Reviews of Modern Physics / NIST

CODATA Recommended Values of the Fundamental Physical Constants: 2022

The 2022 self-consistent recommended values and conversion factors of physics and chemistry from the CODATA least-squares adjustment.

2025Source ↗

Limits established by this paper

2026

CLM-CODATA-0355= 0.881 45 ± 0.000 13LR-001354 — W to Z mass ratio

ACCEPTED

2026

CLM-CODATA-0354= 2.897 771 955... e-3 (exact)LR-001353 — Wien wavelength displacement law constant

ACCEPTED

2026

CLM-CODATA-0353= 5.878 925 757... e10 (exact)LR-001352 — Wien frequency displacement law constant

ACCEPTED

2026

CLM-CODATA-0352= 0.223 05 ± 0.000 23LR-001351 — weak mixing angle

ACCEPTED

2026

CLM-CODATA-0351= 25 812.807 45... (exact)LR-001350 — von Klitzing constant

ACCEPTED

2026

CLM-CODATA-0350= 1.256 637 061 27 e-6 ± 0.000 000 000 20 e-6LR-001349 — vacuum mag. permeability

ACCEPTED

2026

CLM-CODATA-0349= 8.854 187 8188 e-12 ± 0.000 000 0014 e-12LR-001348 — vacuum electric permittivity

ACCEPTED

2026

CLM-CODATA-0348= 1.660 539 068 92 e-27 ± 0.000 000 000 52 e-27LR-001347 — unified atomic mass unit

ACCEPTED

2026

CLM-CODATA-0347= 1.066 639 9189 ± 0.000 000 0021LR-001346 — triton to proton mag. mom. ratio

ACCEPTED

2026

CLM-CODATA-0346= 3.015 500 715 97 ± 0.000 000 000 10LR-001345 — triton relative atomic mass

ACCEPTED

2026

CLM-CODATA-0345= 2.993 717 034 03 ± 0.000 000 000 10LR-001344 — triton-proton mass ratio

ACCEPTED

2026

CLM-CODATA-0344= 3.015 500 719 13 e-3 ± 0.000 000 000 94 e-3LR-001343 — triton molar mass

ACCEPTED

2026

CLM-CODATA-0343= 3.015 500 715 97 ± 0.000 000 000 10LR-001342 — triton mass in u

ACCEPTED

2026

CLM-CODATA-0342= 2808.921 136 68 ± 0.000 000 88LR-001341 — triton mass energy equivalent in MeV

ACCEPTED

2026

CLM-CODATA-0341= 4.500 387 8119 e-10 ± 0.000 000 0014 e-10LR-001340 — triton mass energy equivalent

ACCEPTED

2026

CLM-CODATA-0340= 5.007 356 7512 e-27 ± 0.000 000 0016 e-27LR-001339 — triton mass

ACCEPTED

2026

CLM-CODATA-0339= 2.978 962 4650 ± 0.000 000 0059LR-001338 — triton mag. mom. to nuclear magneton ratio

ACCEPTED

2026

CLM-CODATA-0338= 1.622 393 6648 e-3 ± 0.000 000 0032 e-3LR-001337 — triton mag. mom. to Bohr magneton ratio

ACCEPTED

2026

CLM-CODATA-0337= 1.504 609 5178 e-26 ± 0.000 000 0030 e-26LR-001336 — triton mag. mom.

ACCEPTED

2026

CLM-CODATA-0336= 5.957 924 930 ± 0.000 000 012LR-001335 — triton g factor

ACCEPTED

2026

CLM-CODATA-0335= 5496.921 535 51 ± 0.000 000 21LR-001334 — triton-electron mass ratio

ACCEPTED

2026

CLM-CODATA-0334= 6.652 458 7051 e-29 ± 0.000 000 0062 e-29LR-001333 — Thomson cross section

ACCEPTED

2026

CLM-CODATA-0333= 1.893 76 ± 0.000 13LR-001332 — tau-proton mass ratio

ACCEPTED

2026

CLM-CODATA-0332= 1.891 15 ± 0.000 13LR-001331 — tau-neutron mass ratio

ACCEPTED

2026

CLM-CODATA-0331= 16.8170 ± 0.0011LR-001330 — tau-muon mass ratio

ACCEPTED

2026

CLM-CODATA-0330= 1.907 54 e-3 ± 0.000 13 e-3LR-001329 — tau molar mass

ACCEPTED

2026

CLM-CODATA-0329= 1.907 54 ± 0.000 13LR-001328 — tau mass in u

ACCEPTED

2026

CLM-CODATA-0328= 2.846 84 e-10 ± 0.000 19 e-10LR-001327 — tau mass energy equivalent

ACCEPTED

2026

CLM-CODATA-0327= 3.167 54 e-27 ± 0.000 21 e-27LR-001326 — tau mass

ACCEPTED

2026

CLM-CODATA-0326= 1776.86 ± 0.12LR-001325 — tau energy equivalent

ACCEPTED

2026

CLM-CODATA-0325= 3477.23 ± 0.23LR-001324 — tau-electron mass ratio

ACCEPTED

2026

CLM-CODATA-0324= 6.977 71 e-16 ± 0.000 47 e-16LR-001323 — tau Compton wavelength

ACCEPTED

2026

CLM-CODATA-0323= 5.670 374 419... e-8 (exact)LR-001322 — Stefan-Boltzmann constant

ACCEPTED

2026

CLM-CODATA-0322= 100 000 (exact)LR-001321 — standard-state pressure

ACCEPTED

2026

CLM-CODATA-0321= 101 325 (exact)LR-001320 — standard atmosphere

ACCEPTED

2026

CLM-CODATA-0320= 9.806 65 (exact)LR-001319 — standard acceleration of gravity

ACCEPTED

2026

CLM-CODATA-0319= 299 792 458 (exact)LR-001318 — speed of light in vacuum

ACCEPTED

2026

CLM-CODATA-0318= 2.394 50 e-8 ± 0.000 20 e-8LR-001317 — shielding difference of t and p in HT

ACCEPTED

2026

CLM-CODATA-0317= 1.987 70 e-8 ± 0.000 10 e-8LR-001316 — shielding difference of d and p in HD

ACCEPTED

2026

CLM-CODATA-0316= 2.792 775 648 ± 0.000 000 011LR-001315 — shielded proton mag. mom. to nuclear magneton ratio

ACCEPTED

2026

CLM-CODATA-0315= 1.520 993 1551 e-3 ± 0.000 000 0062 e-3LR-001314 — shielded proton mag. mom. to Bohr magneton ratio

ACCEPTED

2026

CLM-CODATA-0314= 1.410 570 5830 e-26 ± 0.000 000 0058 e-26LR-001313 — shielded proton mag. mom.

ACCEPTED

2026

CLM-CODATA-0313= 42.576 385 43 ± 0.000 000 17LR-001312 — shielded proton gyromag. ratio in MHz/T

ACCEPTED

2026

CLM-CODATA-0312= 2.675 153 194 e8 ± 0.000 000 011 e8LR-001311 — shielded proton gyromag. ratio

ACCEPTED

2026

CLM-CODATA-0311= -0.761 786 1334 ± 0.000 000 0031LR-001310 — shielded helion to shielded proton mag. mom. ratio

ACCEPTED

2026

CLM-CODATA-0310= -0.761 766 577 21 ± 0.000 000 000 66LR-001309 — shielded helion to proton mag. mom. ratio

ACCEPTED

2026

CLM-CODATA-0309= -2.127 497 7624 ± 0.000 000 0017LR-001308 — shielded helion mag. mom. to nuclear magneton ratio

ACCEPTED

2026

CLM-CODATA-0308= -1.158 671 494 57 e-3 ± 0.000 000 000 94 e-3LR-001307 — shielded helion mag. mom. to Bohr magneton ratio

ACCEPTED

2026

CLM-CODATA-0307= -1.074 553 110 35 e-26 ± 0.000 000 000 93 e-26LR-001306 — shielded helion mag. mom.

ACCEPTED

2026

CLM-CODATA-0306= 32.434 100 033 ± 0.000 000 028LR-001305 — shielded helion gyromag. ratio in MHz/T

ACCEPTED

2026

CLM-CODATA-0305= 2.037 894 6078 e8 ± 0.000 000 0018 e8LR-001304 — shielded helion gyromag. ratio

ACCEPTED

2026

CLM-CODATA-0304= 1.438 776 877... e-2 (exact)LR-001303 — second radiation constant

ACCEPTED

2026

CLM-CODATA-0303= -1.164 870 521 49 ± 0.000 000 000 47LR-001302 — Sackur-Tetrode constant (1 K, 101.325 kPa)

ACCEPTED

2026

CLM-CODATA-0302= -1.151 707 534 96 ± 0.000 000 000 47LR-001301 — Sackur-Tetrode constant (1 K, 100 kPa)

ACCEPTED

2026

CLM-CODATA-0301= 2.179 872 361 1030 e-18 ± 0.000 000 000 0024 e-18LR-001300 — Rydberg constant times hc in J

ACCEPTED

2026

CLM-CODATA-0300= 13.605 693 122 990 ± 0.000 000 000 015LR-001299 — Rydberg constant times hc in eV

ACCEPTED

2026

CLM-CODATA-0299= 3.289 841 960 2500 e15 ± 0.000 000 000 0036 e15LR-001298 — Rydberg constant times c in Hz

ACCEPTED

2026

CLM-CODATA-0298= 10 973 731.568 157 ± 0.000 012LR-001297 — Rydberg constant

ACCEPTED

2026

CLM-CODATA-0297= 1.110 538 e-16 ± 0.000 075 e-16LR-001296 — reduced tau Compton wavelength

ACCEPTED

2026

CLM-CODATA-0296= 2.103 089 100 51 e-16 ± 0.000 000 000 66 e-16LR-001295 — reduced proton Compton wavelength

ACCEPTED

2026

CLM-CODATA-0295= 197.326 980 4... (exact)LR-001294 — reduced Planck constant times c in MeV fm

ACCEPTED

2026

CLM-CODATA-0294= 6.582 119 569... e-16 (exact)LR-001293 — reduced Planck constant in eV s

ACCEPTED

2026

CLM-CODATA-0293= 1.054 571 817... e-34 (exact)LR-001292 — reduced Planck constant

ACCEPTED

2026

CLM-CODATA-0292= 2.100 194 1520 e-16 ± 0.000 000 0011 e-16LR-001291 — reduced neutron Compton wavelength

ACCEPTED

2026

CLM-CODATA-0291= 1.867 594 306 e-15 ± 0.000 000 042 e-15LR-001290 — reduced muon Compton wavelength

ACCEPTED

2026

CLM-CODATA-0290= 3.861 592 6744 e-13 ± 0.000 000 0012 e-13LR-001289 — reduced Compton wavelength

ACCEPTED

2026

CLM-CODATA-0289= 7.273 895 0934 e-4 ± 0.000 000 0023 e-4LR-001288 — quantum of circulation times 2

ACCEPTED

2026

CLM-CODATA-0288= 3.636 947 5467 e-4 ± 0.000 000 0011 e-4LR-001287 — quantum of circulation

ACCEPTED

2026

CLM-CODATA-0287= 0.528 051 ± 0.000 036LR-001286 — proton-tau mass ratio

ACCEPTED

2026

CLM-CODATA-0286= 8.4075 e-16 ± 0.0064 e-16LR-001285 — proton rms charge radius

ACCEPTED

2026

CLM-CODATA-0285= 1.007 276 466 5789 ± 0.000 000 000 0083LR-001284 — proton relative atomic mass

ACCEPTED

2026

CLM-CODATA-0284= 0.998 623 477 97 ± 0.000 000 000 40LR-001283 — proton-neutron mass ratio

ACCEPTED

2026

CLM-CODATA-0283= -1.459 898 02 ± 0.000 000 34LR-001282 — proton-neutron mag. mom. ratio

ACCEPTED

2026

CLM-CODATA-0282= 8.880 243 38 ± 0.000 000 20LR-001281 — proton-muon mass ratio

ACCEPTED

2026

CLM-CODATA-0281= 1.007 276 467 64 e-3 ± 0.000 000 000 31 e-3LR-001280 — proton molar mass

ACCEPTED

2026

CLM-CODATA-0280= 1.007 276 466 5789 ± 0.000 000 000 0083LR-001279 — proton mass in u

ACCEPTED

2026

CLM-CODATA-0279= 938.272 089 43 ± 0.000 000 29LR-001278 — proton mass energy equivalent in MeV

ACCEPTED

2026

CLM-CODATA-0278= 1.503 277 618 02 e-10 ± 0.000 000 000 47 e-10LR-001277 — proton mass energy equivalent

ACCEPTED

2026

CLM-CODATA-0277= 1.672 621 925 95 e-27 ± 0.000 000 000 52 e-27LR-001276 — proton mass

ACCEPTED

2026

CLM-CODATA-0276= 2.567 15 e-5 ± 0.000 41 e-5LR-001275 — proton mag. shielding correction

ACCEPTED

2026

CLM-CODATA-0275= 2.792 847 344 63 ± 0.000 000 000 82LR-001274 — proton mag. mom. to nuclear magneton ratio

ACCEPTED

2026

CLM-CODATA-0274= 1.521 032 202 30 e-3 ± 0.000 000 000 45 e-3LR-001273 — proton mag. mom. to Bohr magneton ratio

ACCEPTED

2026

CLM-CODATA-0273= 1.410 606 795 45 e-26 ± 0.000 000 000 60 e-26LR-001272 — proton mag. mom.

ACCEPTED

2026

CLM-CODATA-0272= 42.577 478 461 ± 0.000 000 018LR-001271 — proton gyromag. ratio in MHz/T

ACCEPTED

2026

CLM-CODATA-0271= 2.675 221 8708 e8 ± 0.000 000 0011 e8LR-001270 — proton gyromag. ratio

ACCEPTED

2026

CLM-CODATA-0270= 5.585 694 6893 ± 0.000 000 0016LR-001269 — proton g factor

ACCEPTED

2026

CLM-CODATA-0269= 1836.152 673 426 ± 0.000 000 032LR-001268 — proton-electron mass ratio

ACCEPTED

2026

CLM-CODATA-0268= 1.321 409 853 60 e-15 ± 0.000 000 000 41 e-15LR-001267 — proton Compton wavelength

ACCEPTED

2026

CLM-CODATA-0267= 9.578 833 1430 e7 ± 0.000 000 0030 e7LR-001266 — proton charge to mass quotient

ACCEPTED

2026

CLM-CODATA-0266= 5.391 247 e-44 ± 0.000 060 e-44LR-001265 — Planck time

ACCEPTED

2026

CLM-CODATA-0265= 1.416 784 e32 ± 0.000 016 e32LR-001264 — Planck temperature

ACCEPTED

2026

CLM-CODATA-0264= 1.220 890 e19 ± 0.000 014 e19LR-001263 — Planck mass energy equivalent in GeV

ACCEPTED

2026

CLM-CODATA-0263= 2.176 434 e-8 ± 0.000 024 e-8LR-001262 — Planck mass

ACCEPTED

2026

CLM-CODATA-0262= 1.616 255 e-35 ± 0.000 018 e-35LR-001261 — Planck length

ACCEPTED

2026

CLM-CODATA-0261= 4.135 667 696... e-15 (exact)LR-001260 — Planck constant in eV/Hz

ACCEPTED

2026

CLM-CODATA-0260= 6.626 070 15 e-34 (exact)LR-001259 — Planck constant

ACCEPTED

2026

CLM-CODATA-0259= 7.622 593 2188 ± 0.000 000 0024LR-001258 — nuclear magneton in MHz/T

ACCEPTED

2026

CLM-CODATA-0258= 3.658 267 7706 e-4 ± 0.000 000 0011 e-4LR-001257 — nuclear magneton in K/T

ACCEPTED

2026

CLM-CODATA-0257= 2.542 623 410 09 e-2 ± 0.000 000 000 79 e-2LR-001256 — nuclear magneton in inverse meter per tesla

ACCEPTED

2026

CLM-CODATA-0256= 3.152 451 254 17 e-8 ± 0.000 000 000 98 e-8LR-001255 — nuclear magneton in eV/T

ACCEPTED

2026

CLM-CODATA-0255= 5.050 783 7393 e-27 ± 0.000 000 0016 e-27LR-001254 — nuclear magneton

ACCEPTED

2026

CLM-CODATA-0254= 6.708 83 e-39 ± 0.000 15 e-39LR-001253 — Newtonian constant of gravitation over h-bar c

ACCEPTED

2026

CLM-CODATA-0253= 6.674 30 e-11 ± 0.000 15 e-11LR-001252 — Newtonian constant of gravitation

ACCEPTED

2026

CLM-CODATA-0252= -0.684 996 94 ± 0.000 000 16LR-001251 — neutron to shielded proton mag. mom. ratio

ACCEPTED

2026

CLM-CODATA-0251= 0.528 779 ± 0.000 036LR-001250 — neutron-tau mass ratio

ACCEPTED

2026

CLM-CODATA-0250= 1.008 664 916 06 ± 0.000 000 000 40LR-001249 — neutron relative atomic mass

ACCEPTED

2026

CLM-CODATA-0249= 1.001 378 419 46 ± 0.000 000 000 40LR-001248 — neutron-proton mass ratio

ACCEPTED

2026

CLM-CODATA-0248= 1.388 449 48 e-3 ± 0.000 000 40 e-3LR-001247 — neutron-proton mass difference in u

ACCEPTED

2026

CLM-CODATA-0247= 1.293 332 51 ± 0.000 000 38LR-001246 — neutron-proton mass difference energy equivalent in MeV

ACCEPTED

2026

CLM-CODATA-0246= 2.072 147 12 e-13 ± 0.000 000 60 e-13LR-001245 — neutron-proton mass difference energy equivalent

ACCEPTED

2026

CLM-CODATA-0245= 2.305 574 61 e-30 ± 0.000 000 67 e-30LR-001244 — neutron-proton mass difference

ACCEPTED

2026

CLM-CODATA-0244= -0.684 979 35 ± 0.000 000 16LR-001243 — neutron-proton mag. mom. ratio

ACCEPTED

2026

CLM-CODATA-0243= 8.892 484 08 ± 0.000 000 20LR-001242 — neutron-muon mass ratio

ACCEPTED

2026

CLM-CODATA-0242= 1.008 664 917 12 e-3 ± 0.000 000 000 51 e-3LR-001241 — neutron molar mass

ACCEPTED

2026

CLM-CODATA-0241= 1.008 664 916 06 ± 0.000 000 000 40LR-001240 — neutron mass in u

ACCEPTED

2026

CLM-CODATA-0240= 939.565 421 94 ± 0.000 000 48LR-001239 — neutron mass energy equivalent in MeV

ACCEPTED

2026

CLM-CODATA-0239= 1.505 349 765 14 e-10 ± 0.000 000 000 76 e-10LR-001238 — neutron mass energy equivalent

ACCEPTED

2026

CLM-CODATA-0238= 1.674 927 500 56 e-27 ± 0.000 000 000 85 e-27LR-001237 — neutron mass

ACCEPTED

2026

CLM-CODATA-0237= -1.913 042 76 ± 0.000 000 45LR-001236 — neutron mag. mom. to nuclear magneton ratio

ACCEPTED

2026

CLM-CODATA-0236= -1.041 875 65 e-3 ± 0.000 000 25 e-3LR-001235 — neutron mag. mom. to Bohr magneton ratio

ACCEPTED

2026

CLM-CODATA-0235= -9.662 3653 e-27 ± 0.000 0023 e-27LR-001234 — neutron mag. mom.

ACCEPTED

2026

CLM-CODATA-0234= 29.164 6935 ± 0.000 0069LR-001233 — neutron gyromag. ratio in MHz/T

ACCEPTED

2026

CLM-CODATA-0233= 1.832 471 74 e8 ± 0.000 000 43 e8LR-001232 — neutron gyromag. ratio

ACCEPTED

2026

CLM-CODATA-0232= -3.826 085 52 ± 0.000 000 90LR-001231 — neutron g factor

ACCEPTED

2026

CLM-CODATA-0231= 1838.683 662 00 ± 0.000 000 74LR-001230 — neutron-electron mass ratio

ACCEPTED

2026

CLM-CODATA-0230= 1.040 668 84 e-3 ± 0.000 000 24 e-3LR-001229 — neutron-electron mag. mom. ratio

ACCEPTED

2026

CLM-CODATA-0229= 1.319 590 903 82 e-15 ± 0.000 000 000 67 e-15LR-001228 — neutron Compton wavelength

ACCEPTED

2026

CLM-CODATA-0228= 299 792 458 (exact)LR-001227 — natural unit of velocity

ACCEPTED

2026

CLM-CODATA-0227= 1.288 088 666 44 e-21 ± 0.000 000 000 40 e-21LR-001226 — natural unit of time

ACCEPTED

2026

CLM-CODATA-0226= 0.510 998 950 69 ± 0.000 000 000 16LR-001225 — natural unit of momentum in MeV/c

ACCEPTED

2026

CLM-CODATA-0225= 2.730 924 534 46 e-22 ± 0.000 000 000 85 e-22LR-001224 — natural unit of momentum

ACCEPTED

2026

CLM-CODATA-0224= 9.109 383 7139 e-31 ± 0.000 000 0028 e-31LR-001223 — natural unit of mass

ACCEPTED

2026

CLM-CODATA-0223= 3.861 592 6744 e-13 ± 0.000 000 0012 e-13LR-001222 — natural unit of length

ACCEPTED

2026

CLM-CODATA-0222= 0.510 998 950 69 ± 0.000 000 000 16LR-001221 — natural unit of energy in MeV

ACCEPTED

2026

CLM-CODATA-0221= 8.187 105 7880 e-14 ± 0.000 000 0026 e-14LR-001220 — natural unit of energy

ACCEPTED

2026

CLM-CODATA-0220= 6.582 119 569... e-16 (exact)LR-001219 — natural unit of action in eV s

ACCEPTED

2026

CLM-CODATA-0219= 1.054 571 817... e-34 (exact)LR-001218 — natural unit of action

ACCEPTED

2026

CLM-CODATA-0218= 5.946 35 e-2 ± 0.000 40 e-2LR-001217 — muon-tau mass ratio

ACCEPTED

2026

CLM-CODATA-0217= 0.112 609 5262 ± 0.000 000 0025LR-001216 — muon-proton mass ratio

ACCEPTED

2026

CLM-CODATA-0216= -3.183 345 146 ± 0.000 000 071LR-001215 — muon-proton mag. mom. ratio

ACCEPTED

2026

CLM-CODATA-0215= 0.112 454 5168 ± 0.000 000 0025LR-001214 — muon-neutron mass ratio

ACCEPTED

2026

CLM-CODATA-0214= 1.134 289 258 e-4 ± 0.000 000 025 e-4LR-001213 — muon molar mass

ACCEPTED

2026

CLM-CODATA-0213= 0.113 428 9257 ± 0.000 000 0025LR-001212 — muon mass in u

ACCEPTED

2026

CLM-CODATA-0212= 105.658 3755 ± 0.000 0023LR-001211 — muon mass energy equivalent in MeV

ACCEPTED

2026

CLM-CODATA-0211= 1.692 833 804 e-11 ± 0.000 000 038 e-11LR-001210 — muon mass energy equivalent

ACCEPTED

2026

CLM-CODATA-0210= 1.883 531 627 e-28 ± 0.000 000 042 e-28LR-001209 — muon mass

ACCEPTED

2026

CLM-CODATA-0209= -8.890 597 04 ± 0.000 000 20LR-001208 — muon mag. mom. to nuclear magneton ratio

ACCEPTED

2026

CLM-CODATA-0208= -4.841 970 48 e-3 ± 0.000 000 11 e-3LR-001207 — muon mag. mom. to Bohr magneton ratio

ACCEPTED

2026

CLM-CODATA-0207= 1.165 920 62 e-3 ± 0.000 000 41 e-3LR-001206 — muon mag. mom. anomaly

ACCEPTED

2026

CLM-CODATA-0206= -4.490 448 30 e-26 ± 0.000 000 10 e-26LR-001205 — muon mag. mom.

ACCEPTED

2026

CLM-CODATA-0205= -2.002 331 841 23 ± 0.000 000 000 82LR-001204 — muon g factor

ACCEPTED

2026

CLM-CODATA-0204= 206.768 2827 ± 0.000 0046LR-001203 — muon-electron mass ratio

ACCEPTED

2026

CLM-CODATA-0203= 1.173 444 110 e-14 ± 0.000 000 026 e-14LR-001202 — muon Compton wavelength

ACCEPTED

2026

CLM-CODATA-0202= 1.002 099 52 e-13 ± 0.000 000 53 e-13LR-001201 — Molybdenum x unit

ACCEPTED

2026

CLM-CODATA-0201= 1.205 883 199 e-5 ± 0.000 000 060 e-5LR-001200 — molar volume of silicon

ACCEPTED

2026

CLM-CODATA-0200= 22.413 969 54... e-3 (exact)LR-001199 — molar volume of ideal gas (273.15 K, 101.325 kPa)

ACCEPTED

2026

CLM-CODATA-0199= 22.710 954 64... e-3 (exact)LR-001198 — molar volume of ideal gas (273.15 K, 100 kPa)

ACCEPTED

2026

CLM-CODATA-0198= 3.990 312 712... e-10 (exact)LR-001197 — molar Planck constant

ACCEPTED

2026

CLM-CODATA-0197= 12.000 000 0126 e-3 ± 0.000 000 0037 e-3LR-001196 — molar mass of carbon-12

ACCEPTED

2026

CLM-CODATA-0196= 1.000 000 001 05 e-3 ± 0.000 000 000 31 e-3LR-001195 — molar mass constant

ACCEPTED

2026

CLM-CODATA-0195= 8.314 462 618... (exact)LR-001194 — molar gas constant

ACCEPTED

2026

CLM-CODATA-0194= 2.067 833 848... e-15 (exact)LR-001193 — mag. flux quantum

ACCEPTED

2026

CLM-CODATA-0193= 683 (exact)LR-001192 — luminous efficacy

ACCEPTED

2026

CLM-CODATA-0192= 2.686 780 111... e25 (exact)LR-001191 — Loschmidt constant (273.15 K, 101.325 kPa)

ACCEPTED

2026

CLM-CODATA-0191= 2.651 645 804... e25 (exact)LR-001190 — Loschmidt constant (273.15 K, 100 kPa)

ACCEPTED

2026

CLM-CODATA-0190= 1.920 155 716 e-10 ± 0.000 000 032 e-10LR-001189 — lattice spacing of ideal Si (220)

ACCEPTED

2026

CLM-CODATA-0189= 5.431 020 511 e-10 ± 0.000 000 089 e-10LR-001188 — lattice parameter of silicon

ACCEPTED

2026

CLM-CODATA-0188= 6.509 657 260... e39 (exact)LR-001187 — kilogram-kelvin relationship

ACCEPTED

2026

CLM-CODATA-0187= 8.987 551 787... e16 (exact)LR-001186 — kilogram-joule relationship

ACCEPTED

2026

CLM-CODATA-0186= 4.524 438 335... e41 (exact)LR-001185 — kilogram-inverse meter relationship

ACCEPTED

2026

CLM-CODATA-0185= 1.356 392 489... e50 (exact)LR-001184 — kilogram-hertz relationship

ACCEPTED

2026

CLM-CODATA-0184= 2.061 485 788 7415 e34 ± 0.000 000 000 0022 e34LR-001183 — kilogram-hartree relationship

ACCEPTED

2026

CLM-CODATA-0183= 5.609 588 603... e35 (exact)LR-001182 — kilogram-electron volt relationship

ACCEPTED

2026

CLM-CODATA-0182= 6.022 140 7537 e26 ± 0.000 000 0019 e26LR-001181 — kilogram-atomic mass unit relationship

ACCEPTED

2026

CLM-CODATA-0181= 1.536 179 187... e-40 (exact)LR-001180 — kelvin-kilogram relationship

ACCEPTED

2026

CLM-CODATA-0180= 1.380 649 e-23 (exact)LR-001179 — kelvin-joule relationship

ACCEPTED

2026

CLM-CODATA-0179= 69.503 480 04... (exact)LR-001178 — kelvin-inverse meter relationship

ACCEPTED

2026

CLM-CODATA-0178= 2.083 661 912... e10 (exact)LR-001177 — kelvin-hertz relationship

ACCEPTED

2026

CLM-CODATA-0177= 3.166 811 563 4564 e-6 ± 0.000 000 000 0035 e-6LR-001176 — kelvin-hartree relationship

ACCEPTED

2026

CLM-CODATA-0176= 8.617 333 262... e-5 (exact)LR-001175 — kelvin-electron volt relationship

ACCEPTED

2026

CLM-CODATA-0175= 9.251 087 2884 e-14 ± 0.000 000 0029 e-14LR-001174 — kelvin-atomic mass unit relationship

ACCEPTED

2026

CLM-CODATA-0174= 1.112 650 056... e-17 (exact)LR-001173 — joule-kilogram relationship

ACCEPTED

2026

CLM-CODATA-0173= 7.242 970 516... e22 (exact)LR-001172 — joule-kelvin relationship

ACCEPTED

2026

CLM-CODATA-0172= 5.034 116 567... e24 (exact)LR-001171 — joule-inverse meter relationship

ACCEPTED

2026

CLM-CODATA-0171= 1.509 190 179... e33 (exact)LR-001170 — joule-hertz relationship

ACCEPTED

2026

CLM-CODATA-0170= 2.293 712 278 3969 e17 ± 0.000 000 000 0025 e17LR-001169 — joule-hartree relationship

ACCEPTED

2026

CLM-CODATA-0169= 6.241 509 074... e18 (exact)LR-001168 — joule-electron volt relationship

ACCEPTED

2026

CLM-CODATA-0168= 6.700 535 2471 e9 ± 0.000 000 0021 e9LR-001167 — joule-atomic mass unit relationship

ACCEPTED

2026

CLM-CODATA-0167= 483 597.848 4... e9 (exact)LR-001166 — Josephson constant

ACCEPTED

2026

CLM-CODATA-0166= 12 906.403 72... (exact)LR-001165 — inverse of conductance quantum

ACCEPTED

2026

CLM-CODATA-0165= 2.210 219 094... e-42 (exact)LR-001164 — inverse meter-kilogram relationship

ACCEPTED

2026

CLM-CODATA-0164= 1.438 776 877... e-2 (exact)LR-001163 — inverse meter-kelvin relationship

ACCEPTED

2026

CLM-CODATA-0163= 1.986 445 857... e-25 (exact)LR-001162 — inverse meter-joule relationship

ACCEPTED

2026

CLM-CODATA-0162= 299 792 458 (exact)LR-001161 — inverse meter-hertz relationship

ACCEPTED

2026

CLM-CODATA-0161= 4.556 335 252 9132 e-8 ± 0.000 000 000 0050 e-8LR-001160 — inverse meter-hartree relationship

ACCEPTED

2026

CLM-CODATA-0160= 1.239 841 984... e-6 (exact)LR-001159 — inverse meter-electron volt relationship

ACCEPTED

2026

CLM-CODATA-0159= 1.331 025 048 24 e-15 ± 0.000 000 000 41 e-15LR-001158 — inverse meter-atomic mass unit relationship

ACCEPTED

2026

CLM-CODATA-0158= 137.035 999 177 ± 0.000 000 021LR-001157 — inverse fine-structure constant

ACCEPTED

2026

CLM-CODATA-0157= 9 192 631 770 (exact)LR-001156 — hyperfine transition frequency of Cs-133

ACCEPTED

2026

CLM-CODATA-0156= 7.372 497 323... e-51 (exact)LR-001155 — hertz-kilogram relationship

ACCEPTED

2026

CLM-CODATA-0155= 4.799 243 073... e-11 (exact)LR-001154 — hertz-kelvin relationship

ACCEPTED

2026

CLM-CODATA-0154= 6.626 070 15 e-34 (exact)LR-001153 — hertz-joule relationship

ACCEPTED

2026

CLM-CODATA-0153= 3.335 640 951... e-9 (exact)LR-001152 — hertz-inverse meter relationship

ACCEPTED

2026

CLM-CODATA-0152= 1.519 829 846 0574 e-16 ± 0.000 000 000 0017 e-16LR-001151 — hertz-hartree relationship

ACCEPTED

2026

CLM-CODATA-0151= 4.135 667 696... e-15 (exact)LR-001150 — hertz-electron volt relationship

ACCEPTED

2026

CLM-CODATA-0150= 4.439 821 6590 e-24 ± 0.000 000 0014 e-24LR-001149 — hertz-atomic mass unit relationship

ACCEPTED

2026

CLM-CODATA-0149= 5.996 7029 e-5 ± 0.000 0023 e-5LR-001148 — helion shielding shift

ACCEPTED

2026

CLM-CODATA-0148= 3.014 932 246 932 ± 0.000 000 000 074LR-001147 — helion relative atomic mass

ACCEPTED

2026

CLM-CODATA-0147= 2.993 152 671 552 ± 0.000 000 000 070LR-001146 — helion-proton mass ratio

ACCEPTED

2026

CLM-CODATA-0146= 3.014 932 250 10 e-3 ± 0.000 000 000 94 e-3LR-001145 — helion molar mass

ACCEPTED

2026

CLM-CODATA-0145= 3.014 932 246 932 ± 0.000 000 000 074LR-001144 — helion mass in u

ACCEPTED

2026

CLM-CODATA-0144= 2808.391 611 12 ± 0.000 000 88LR-001143 — helion mass energy equivalent in MeV

ACCEPTED

2026

CLM-CODATA-0143= 4.499 539 4185 e-10 ± 0.000 000 0014 e-10LR-001142 — helion mass energy equivalent

ACCEPTED

2026

CLM-CODATA-0142= 5.006 412 7862 e-27 ± 0.000 000 0016 e-27LR-001141 — helion mass

ACCEPTED

2026

CLM-CODATA-0141= -2.127 625 3498 ± 0.000 000 0017LR-001140 — helion mag. mom. to nuclear magneton ratio

ACCEPTED

2026

CLM-CODATA-0140= -1.158 740 980 83 e-3 ± 0.000 000 000 94 e-3LR-001139 — helion mag. mom. to Bohr magneton ratio

ACCEPTED

2026

CLM-CODATA-0139= -1.074 617 551 98 e-26 ± 0.000 000 000 93 e-26LR-001138 — helion mag. mom.

ACCEPTED

2026

CLM-CODATA-0138= -4.255 250 6995 ± 0.000 000 0034LR-001137 — helion g factor

ACCEPTED

2026

CLM-CODATA-0137= 5495.885 279 84 ± 0.000 000 16LR-001136 — helion-electron mass ratio

ACCEPTED

2026

CLM-CODATA-0136= 4.850 870 209 5419 e-35 ± 0.000 000 000 0053 e-35LR-001135 — hartree-kilogram relationship

ACCEPTED

2026

CLM-CODATA-0135= 3.157 750 248 0398 e5 ± 0.000 000 000 0034 e5LR-001134 — hartree-kelvin relationship

ACCEPTED

2026

CLM-CODATA-0134= 4.359 744 722 2060 e-18 ± 0.000 000 000 0048 e-18LR-001133 — hartree-joule relationship

ACCEPTED

2026

CLM-CODATA-0133= 2.194 746 313 6314 e7 ± 0.000 000 000 0024 e7LR-001132 — hartree-inverse meter relationship

ACCEPTED

2026

CLM-CODATA-0132= 6.579 683 920 4999 e15 ± 0.000 000 000 0072 e15LR-001131 — hartree-hertz relationship

ACCEPTED

2026

CLM-CODATA-0131= 27.211 386 245 981 ± 0.000 000 000 030LR-001130 — Hartree energy in eV

ACCEPTED

2026

CLM-CODATA-0130= 4.359 744 722 2060 e-18 ± 0.000 000 000 0048 e-18LR-001129 — Hartree energy

ACCEPTED

2026

CLM-CODATA-0129= 27.211 386 245 981 ± 0.000 000 000 030LR-001128 — hartree-electron volt relationship

ACCEPTED

2026

CLM-CODATA-0128= 2.921 262 317 97 e-8 ± 0.000 000 000 91 e-8LR-001127 — hartree-atomic mass unit relationship

ACCEPTED

2026

CLM-CODATA-0127= 1.191 042 972... e-16 (exact)LR-001126 — first radiation constant for spectral radiance

ACCEPTED

2026

CLM-CODATA-0126= 3.741 771 852... e-16 (exact)LR-001125 — first radiation constant

ACCEPTED

2026

CLM-CODATA-0125= 7.297 352 5643 e-3 ± 0.000 000 0011 e-3LR-001124 — fine-structure constant

ACCEPTED

2026

CLM-CODATA-0124= 1.166 3787 e-5 ± 0.000 0006 e-5LR-001123 — Fermi coupling constant

ACCEPTED

2026

CLM-CODATA-0123= 96 485.332 12... (exact)LR-001122 — Faraday constant

ACCEPTED

2026

CLM-CODATA-0122= 1.519 267 447... e15 (exact)LR-001121 — elementary charge over h-bar

ACCEPTED

2026

CLM-CODATA-0121= 1.602 176 634 e-19 (exact)LR-001120 — elementary charge

ACCEPTED

2026

CLM-CODATA-0120= 1.782 661 921... e-36 (exact)LR-001119 — electron volt-kilogram relationship

ACCEPTED

2026

CLM-CODATA-0119= 1.160 451 812... e4 (exact)LR-001118 — electron volt-kelvin relationship

ACCEPTED

2026

CLM-CODATA-0118= 1.602 176 634 e-19 (exact)LR-001117 — electron volt-joule relationship

ACCEPTED

2026

CLM-CODATA-0117= 8.065 543 937... e5 (exact)LR-001116 — electron volt-inverse meter relationship

ACCEPTED

2026

CLM-CODATA-0116= 2.417 989 242... e14 (exact)LR-001115 — electron volt-hertz relationship

ACCEPTED

2026

CLM-CODATA-0115= 3.674 932 217 5665 e-2 ± 0.000 000 000 0040 e-2LR-001114 — electron volt-hartree relationship

ACCEPTED

2026

CLM-CODATA-0114= 1.073 544 100 83 e-9 ± 0.000 000 000 33 e-9LR-001113 — electron volt-atomic mass unit relationship

ACCEPTED

2026

CLM-CODATA-0113= 1.602 176 634 e-19 (exact)LR-001112 — electron volt

ACCEPTED

2026

CLM-CODATA-0112= 1.819 200 062 327 e-4 ± 0.000 000 000 068 e-4LR-001111 — electron-triton mass ratio

ACCEPTED

2026

CLM-CODATA-0111= -658.227 5856 ± 0.000 0027LR-001110 — electron to shielded proton mag. mom. ratio

ACCEPTED

2026

CLM-CODATA-0110= 864.058 239 86 ± 0.000 000 70LR-001109 — electron to shielded helion mag. mom. ratio

ACCEPTED

2026

CLM-CODATA-0109= 1.370 933 554 733 e-4 ± 0.000 000 000 032 e-4LR-001108 — electron to alpha particle mass ratio

ACCEPTED

2026

CLM-CODATA-0108= 2.875 85 e-4 ± 0.000 19 e-4LR-001107 — electron-tau mass ratio

ACCEPTED

2026

CLM-CODATA-0107= 5.485 799 090 441 e-4 ± 0.000 000 000 097 e-4LR-001106 — electron relative atomic mass

ACCEPTED

2026

CLM-CODATA-0106= 5.446 170 214 889 e-4 ± 0.000 000 000 094 e-4LR-001105 — electron-proton mass ratio

ACCEPTED

2026

CLM-CODATA-0105= -658.210 687 89 ± 0.000 000 19LR-001104 — electron-proton mag. mom. ratio

ACCEPTED

2026

CLM-CODATA-0104= 5.438 673 4416 e-4 ± 0.000 000 0022 e-4LR-001103 — electron-neutron mass ratio

ACCEPTED

2026

CLM-CODATA-0103= 960.920 48 ± 0.000 23LR-001102 — electron-neutron mag. mom. ratio

ACCEPTED

2026

CLM-CODATA-0102= 4.836 331 70 e-3 ± 0.000 000 11 e-3LR-001101 — electron-muon mass ratio

ACCEPTED

2026

CLM-CODATA-0101= 206.766 9881 ± 0.000 0046LR-001100 — electron-muon mag. mom. ratio

ACCEPTED

2026

CLM-CODATA-0100= 5.485 799 0962 e-7 ± 0.000 000 0017 e-7LR-001099 — electron molar mass

ACCEPTED

2026

CLM-CODATA-0099= 5.485 799 090 441 e-4 ± 0.000 000 000 097 e-4LR-001098 — electron mass in u

ACCEPTED

2026

CLM-CODATA-0098= 0.510 998 950 69 ± 0.000 000 000 16LR-001097 — electron mass energy equivalent in MeV

ACCEPTED

2026

CLM-CODATA-0097= 8.187 105 7880 e-14 ± 0.000 000 0026 e-14LR-001096 — electron mass energy equivalent

ACCEPTED

2026

CLM-CODATA-0096= 9.109 383 7139 e-31 ± 0.000 000 0028 e-31LR-001095 — electron mass

ACCEPTED

2026

CLM-CODATA-0095= -1838.281 971 877 ± 0.000 000 032LR-001094 — electron mag. mom. to nuclear magneton ratio

ACCEPTED

2026

CLM-CODATA-0094= -1.001 159 652 180 46 ± 0.000 000 000 000 18LR-001093 — electron mag. mom. to Bohr magneton ratio

ACCEPTED

2026

CLM-CODATA-0093= 1.159 652 180 46 e-3 ± 0.000 000 000 18 e-3LR-001092 — electron mag. mom. anomaly

ACCEPTED

2026

CLM-CODATA-0092= -9.284 764 6917 e-24 ± 0.000 000 0029 e-24LR-001091 — electron mag. mom.

ACCEPTED

2026

CLM-CODATA-0091= 1.819 543 074 649 e-4 ± 0.000 000 000 053 e-4LR-001090 — electron-helion mass ratio

ACCEPTED

2026

CLM-CODATA-0090= 28 024.951 3861 ± 0.000 0087LR-001089 — electron gyromag. ratio in MHz/T

ACCEPTED

2026

CLM-CODATA-0089= 1.760 859 627 84 e11 ± 0.000 000 000 55 e11LR-001088 — electron gyromag. ratio

ACCEPTED

2026

CLM-CODATA-0088= -2.002 319 304 360 92 ± 0.000 000 000 000 36LR-001087 — electron g factor

ACCEPTED

2026

CLM-CODATA-0087= 2.724 437 107 629 e-4 ± 0.000 000 000 047 e-4LR-001086 — electron-deuteron mass ratio

ACCEPTED

2026

CLM-CODATA-0086= -2143.923 4921 ± 0.000 0056LR-001085 — electron-deuteron mag. mom. ratio

ACCEPTED

2026

CLM-CODATA-0085= -1.758 820 008 38 e11 ± 0.000 000 000 55 e11LR-001084 — electron charge to mass quotient

ACCEPTED

2026

CLM-CODATA-0084= 2.127 78 e-15 ± 0.000 27 e-15LR-001083 — deuteron rms charge radius

ACCEPTED

2026

CLM-CODATA-0083= 2.013 553 212 544 ± 0.000 000 000 015LR-001082 — deuteron relative atomic mass

ACCEPTED

2026

CLM-CODATA-0082= 1.999 007 501 2699 ± 0.000 000 000 0084LR-001081 — deuteron-proton mass ratio

ACCEPTED

2026

CLM-CODATA-0081= 0.307 012 209 30 ± 0.000 000 000 79LR-001080 — deuteron-proton mag. mom. ratio

ACCEPTED

2026

CLM-CODATA-0080= -0.448 206 52 ± 0.000 000 11LR-001079 — deuteron-neutron mag. mom. ratio

ACCEPTED

2026

CLM-CODATA-0079= 2.013 553 214 66 e-3 ± 0.000 000 000 63 e-3LR-001078 — deuteron molar mass

ACCEPTED

2026

CLM-CODATA-0078= 2.013 553 212 544 ± 0.000 000 000 015LR-001077 — deuteron mass in u

ACCEPTED

2026

CLM-CODATA-0077= 1875.612 945 00 ± 0.000 000 58LR-001076 — deuteron mass energy equivalent in MeV

ACCEPTED

2026

CLM-CODATA-0076= 3.005 063 234 91 e-10 ± 0.000 000 000 94 e-10LR-001075 — deuteron mass energy equivalent

ACCEPTED

2026

CLM-CODATA-0075= 3.343 583 7768 e-27 ± 0.000 000 0010 e-27LR-001074 — deuteron mass

ACCEPTED

2026

CLM-CODATA-0074= 0.857 438 2335 ± 0.000 000 0022LR-001073 — deuteron mag. mom. to nuclear magneton ratio

ACCEPTED

2026

CLM-CODATA-0073= 4.669 754 568 e-4 ± 0.000 000 012 e-4LR-001072 — deuteron mag. mom. to Bohr magneton ratio

ACCEPTED

2026

CLM-CODATA-0072= 4.330 735 087 e-27 ± 0.000 000 011 e-27LR-001071 — deuteron mag. mom.

ACCEPTED

2026

CLM-CODATA-0071= 0.857 438 2335 ± 0.000 000 0022LR-001070 — deuteron g factor

ACCEPTED

2026

CLM-CODATA-0070= 3670.482 967 655 ± 0.000 000 063LR-001069 — deuteron-electron mass ratio

ACCEPTED

2026

CLM-CODATA-0069= -4.664 345 550 e-4 ± 0.000 000 012 e-4LR-001068 — deuteron-electron mag. mom. ratio

ACCEPTED

2026

CLM-CODATA-0068= 1.002 076 97 e-13 ± 0.000 000 28 e-13LR-001067 — Copper x unit

ACCEPTED

2026

CLM-CODATA-0067= 1.000 000 195 53... (exact)LR-001066 — conventional value of watt-90

ACCEPTED

2026

CLM-CODATA-0066= 25 812.807 (exact)LR-001065 — conventional value of von Klitzing constant

ACCEPTED

2026

CLM-CODATA-0065= 1.000 000 106 66... (exact)LR-001064 — conventional value of volt-90

ACCEPTED

2026

CLM-CODATA-0064= 1.000 000 017 79... (exact)LR-001063 — conventional value of ohm-90

ACCEPTED

2026

CLM-CODATA-0063= 483 597.9 e9 (exact)LR-001062 — conventional value of Josephson constant

ACCEPTED

2026

CLM-CODATA-0062= 1.000 000 017 79... (exact)LR-001061 — conventional value of henry-90

ACCEPTED

2026

CLM-CODATA-0061= 0.999 999 982 20... (exact)LR-001060 — conventional value of farad-90

ACCEPTED

2026

CLM-CODATA-0060= 1.000 000 088 87... (exact)LR-001059 — conventional value of coulomb-90

ACCEPTED

2026

CLM-CODATA-0059= 1.000 000 088 87... (exact)LR-001058 — conventional value of ampere-90

ACCEPTED

2026

CLM-CODATA-0058= 7.748 091 729... e-5 (exact)LR-001057 — conductance quantum

ACCEPTED

2026

CLM-CODATA-0057= 2.426 310 235 38 e-12 ± 0.000 000 000 76 e-12LR-001056 — Compton wavelength

ACCEPTED

2026

CLM-CODATA-0056= 2.817 940 3205 e-15 ± 0.000 000 0013 e-15LR-001055 — classical electron radius

ACCEPTED

2026

CLM-CODATA-0055= 376.730 313 412 ± 0.000 000 059LR-001054 — characteristic impedance of vacuum

ACCEPTED

2026

CLM-CODATA-0054= 69.503 480 04... (exact)LR-001053 — Boltzmann constant in inverse meter per kelvin

ACCEPTED

2026

CLM-CODATA-0053= 2.083 661 912... e10 (exact)LR-001052 — Boltzmann constant in Hz/K

ACCEPTED

2026

CLM-CODATA-0052= 8.617 333 262... e-5 (exact)LR-001051 — Boltzmann constant in eV/K

ACCEPTED

2026

CLM-CODATA-0051= 1.380 649 e-23 (exact)LR-001050 — Boltzmann constant

ACCEPTED

2026

CLM-CODATA-0050= 5.291 772 105 44 e-11 ± 0.000 000 000 82 e-11LR-001049 — Bohr radius

ACCEPTED

2026

CLM-CODATA-0049= 0.671 713 814 72 ± 0.000 000 000 21LR-001048 — Bohr magneton in K/T

ACCEPTED

2026

CLM-CODATA-0048= 46.686 447 719 ± 0.000 000 015LR-001047 — Bohr magneton in inverse meter per tesla

ACCEPTED

2026

CLM-CODATA-0047= 1.399 624 491 71 e10 ± 0.000 000 000 44 e10LR-001046 — Bohr magneton in Hz/T

ACCEPTED

2026

CLM-CODATA-0046= 5.788 381 7982 e-5 ± 0.000 000 0018 e-5LR-001045 — Bohr magneton in eV/T

ACCEPTED

2026

CLM-CODATA-0045= 9.274 010 0657 e-24 ± 0.000 000 0029 e-24LR-001044 — Bohr magneton

ACCEPTED

2026

CLM-CODATA-0044= 6.022 140 76 e23 (exact)LR-001043 — Avogadro constant

ACCEPTED

2026

CLM-CODATA-0043= 2.187 691 262 16 e6 ± 0.000 000 000 34 e6LR-001042 — atomic unit of velocity

ACCEPTED

2026

CLM-CODATA-0042= 2.418 884 326 5864 e-17 ± 0.000 000 000 0026 e-17LR-001041 — atomic unit of time

ACCEPTED

2026

CLM-CODATA-0041= 1.112 650 056 20 e-10 ± 0.000 000 000 17 e-10LR-001040 — atomic unit of permittivity

ACCEPTED

2026

CLM-CODATA-0040= 1.992 851 915 45 e-24 ± 0.000 000 000 31 e-24LR-001039 — atomic unit of momentum

ACCEPTED

2026

CLM-CODATA-0039= 9.109 383 7139 e-31 ± 0.000 000 0028 e-31LR-001038 — atomic unit of mass

ACCEPTED

2026

CLM-CODATA-0038= 7.891 036 5794 e-29 ± 0.000 000 0049 e-29LR-001037 — atomic unit of magnetizability

ACCEPTED

2026

CLM-CODATA-0037= 2.350 517 570 77 e5 ± 0.000 000 000 73 e5LR-001036 — atomic unit of mag. flux density

ACCEPTED

2026

CLM-CODATA-0036= 1.854 802 013 15 e-23 ± 0.000 000 000 58 e-23LR-001035 — atomic unit of mag. dipole mom.

ACCEPTED

2026

CLM-CODATA-0035= 5.291 772 105 44 e-11 ± 0.000 000 000 82 e-11LR-001034 — atomic unit of length

ACCEPTED

2026

CLM-CODATA-0034= 8.238 723 5038 e-8 ± 0.000 000 0013 e-8LR-001033 — atomic unit of force

ACCEPTED

2026

CLM-CODATA-0033= 4.359 744 722 2060 e-18 ± 0.000 000 000 0048 e-18LR-001032 — atomic unit of energy

ACCEPTED

2026

CLM-CODATA-0032= 4.486 551 5185 e-40 ± 0.000 000 0014 e-40LR-001031 — atomic unit of electric quadrupole mom.

ACCEPTED

2026

CLM-CODATA-0031= 27.211 386 245 981 ± 0.000 000 000 030LR-001030 — atomic unit of electric potential

ACCEPTED

2026

CLM-CODATA-0030= 1.648 777 272 12 e-41 ± 0.000 000 000 51 e-41LR-001029 — atomic unit of electric polarizability

ACCEPTED

2026

CLM-CODATA-0029= 9.717 362 4424 e21 ± 0.000 000 0030 e21LR-001028 — atomic unit of electric field gradient

ACCEPTED

2026

CLM-CODATA-0028= 5.142 206 751 12 e11 ± 0.000 000 000 80 e11LR-001027 — atomic unit of electric field

ACCEPTED

2026

CLM-CODATA-0027= 8.478 353 6198 e-30 ± 0.000 000 0013 e-30LR-001026 — atomic unit of electric dipole mom.

ACCEPTED

2026

CLM-CODATA-0026= 6.623 618 237 5082 e-3 ± 0.000 000 000 0072 e-3LR-001025 — atomic unit of current

ACCEPTED

2026

CLM-CODATA-0025= 1.081 202 386 77 e12 ± 0.000 000 000 51 e12LR-001024 — atomic unit of charge density

ACCEPTED

2026

CLM-CODATA-0024= 1.602 176 634 e-19 (exact)LR-001023 — atomic unit of charge

ACCEPTED

2026

CLM-CODATA-0023= 1.054 571 817... e-34 (exact)LR-001022 — atomic unit of action

ACCEPTED

2026

CLM-CODATA-0022= 6.235 379 9735 e-65 ± 0.000 000 0039 e-65LR-001021 — atomic unit of 2nd hyperpolarizability

ACCEPTED

2026

CLM-CODATA-0021= 3.206 361 2996 e-53 ± 0.000 000 0015 e-53LR-001020 — atomic unit of 1st hyperpolarizability

ACCEPTED

2026

CLM-CODATA-0020= 1.660 539 068 92 e-27 ± 0.000 000 000 52 e-27LR-001019 — atomic mass unit-kilogram relationship

ACCEPTED

2026

CLM-CODATA-0019= 1.080 954 020 67 e13 ± 0.000 000 000 34 e13LR-001018 — atomic mass unit-kelvin relationship

ACCEPTED

2026

CLM-CODATA-0018= 1.492 418 087 68 e-10 ± 0.000 000 000 46 e-10LR-001017 — atomic mass unit-joule relationship

ACCEPTED

2026

CLM-CODATA-0017= 7.513 006 6209 e14 ± 0.000 000 0023 e14LR-001016 — atomic mass unit-inverse meter relationship

ACCEPTED

2026

CLM-CODATA-0016= 2.252 342 721 85 e23 ± 0.000 000 000 70 e23LR-001015 — atomic mass unit-hertz relationship

ACCEPTED

2026

CLM-CODATA-0015= 3.423 177 6922 e7 ± 0.000 000 0011 e7LR-001014 — atomic mass unit-hartree relationship

ACCEPTED

2026

CLM-CODATA-0014= 9.314 941 0372 e8 ± 0.000 000 0029 e8LR-001013 — atomic mass unit-electron volt relationship

ACCEPTED

2026

CLM-CODATA-0013= 931.494 103 72 ± 0.000 000 29LR-001012 — atomic mass constant energy equivalent in MeV

ACCEPTED

2026

CLM-CODATA-0012= 1.492 418 087 68 e-10 ± 0.000 000 000 46 e-10LR-001011 — atomic mass constant energy equivalent

ACCEPTED

2026

CLM-CODATA-0011= 1.660 539 068 92 e-27 ± 0.000 000 000 52 e-27LR-001010 — atomic mass constant

ACCEPTED

2026

CLM-CODATA-0010= 1.000 014 95 e-10 ± 0.000 000 90 e-10LR-001009 — Angstrom star

ACCEPTED

2026

CLM-CODATA-0009= 1.6785 e-15 ± 0.0021 e-15LR-001008 — alpha particle rms charge radius

ACCEPTED

2026

CLM-CODATA-0008= 4.001 506 179 129 ± 0.000 000 000 062LR-001007 — alpha particle relative atomic mass

ACCEPTED

2026

CLM-CODATA-0007= 3.972 599 690 252 ± 0.000 000 000 070LR-001006 — alpha particle-proton mass ratio

ACCEPTED

2026

CLM-CODATA-0006= 4.001 506 1833 e-3 ± 0.000 000 0012 e-3LR-001005 — alpha particle molar mass

ACCEPTED

2026

CLM-CODATA-0005= 4.001 506 179 129 ± 0.000 000 000 062LR-001004 — alpha particle mass in u

ACCEPTED

2026

CLM-CODATA-0004= 3727.379 4118 ± 0.000 0012LR-001003 — alpha particle mass energy equivalent in MeV

ACCEPTED

2026

CLM-CODATA-0003= 5.971 920 1997 e-10 ± 0.000 000 0019 e-10LR-001002 — alpha particle mass energy equivalent

ACCEPTED

2026

CLM-CODATA-0002= 6.644 657 3450 e-27 ± 0.000 000 0021 e-27LR-001001 — alpha particle mass

ACCEPTED

2026

CLM-CODATA-0001= 7294.299 541 71 ± 0.000 000 17LR-001000 — alpha particle-electron mass ratio

ACCEPTED