{"dataset":{"id":"3d614c45-2efa-4287-8760-27a16d431660","slug":"codata-constants","name":"CODATA fundamental physical constants","description":"CODATA 2022 recommended values of the fundamental physical constants, published by NIST (a US government work). One document per constant citing the NIST complete listing; refreshed on each CODATA release, roughly every four years.","visibility":"public","version":468,"documentCount":355,"createdAt":"2026-10-03T21:46:09.000Z","updatedAt":"2026-10-04T00:50:21.000Z","publisher":"Koskamo","license":"CODATA 2022 recommended values from NIST, a work of the US government (public domain in the United States)","reviewedAt":"2026-10-03T22:27:15.000Z"},"total":355,"documents":[{"id":"e645a1bf-8ca0-4b3f-9637-d7075124cefe","title":"alpha particle-electron mass ratio","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:28:06.000Z","updatedAt":"2026-10-03T22:28:07.000Z","text":"alpha particle-electron mass ratio = 7294.299 541 71 (CODATA 2022 recommended value, NIST)\n\n- Value: `7294.29954171`\n- Standard uncertainty: `1.7e-7` (relative 2.3 × 10⁻¹¹)\n- Unit: none (dimensionless)"},{"id":"a7aa10e8-19dd-4e5c-a290-ef21acad1447","title":"alpha particle mass","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":2,"createdAt":"2026-10-03T22:28:13.000Z","updatedAt":"2026-10-04T00:26:11.000Z","text":"alpha particle mass = 6.644 657 3450 × 10⁻²⁷ kg (CODATA 2022 recommended value, NIST)\n\n- Value: `6.6446573450e-27`\n- Standard uncertainty: `2.1e-36` (relative 3.2 × 10⁻¹⁰)\n- Unit: `kg`\n- Also known as: helium-4 nucleus mass; m_alpha"},{"id":"bfe294d6-8b28-4608-984f-45308558c500","title":"alpha particle mass energy equivalent","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:28:19.000Z","updatedAt":"2026-10-03T22:28:19.000Z","text":"alpha particle mass energy equivalent = 5.971 920 1997 × 10⁻¹⁰ J (CODATA 2022 recommended value, NIST)\n\n- Value: `5.9719201997e-10`\n- Standard uncertainty: `1.9e-19` (relative 3.2 × 10⁻¹⁰)\n- Unit: `J`"},{"id":"0929449a-df7e-4e5b-9b71-fc000d70634f","title":"alpha particle mass energy equivalent in MeV","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:28:25.000Z","updatedAt":"2026-10-03T22:28:25.000Z","text":"alpha particle mass energy equivalent in MeV = 3727.379 4118 MeV (CODATA 2022 recommended value, NIST)\n\n- Value: `3727.3794118`\n- Standard uncertainty: `1.2e-6` (relative 3.2 × 10⁻¹⁰)\n- Unit: `MeV`"},{"id":"98a19865-f183-4de3-a96f-e331ab9f07c6","title":"alpha particle mass in u","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:28:31.000Z","updatedAt":"2026-10-03T22:28:31.000Z","text":"alpha particle mass in u = 4.001 506 179 129 u (CODATA 2022 recommended value, NIST)\n\n- Value: `4.001506179129`\n- Standard uncertainty: `6.2e-11` (relative 1.5 × 10⁻¹¹)\n- Unit: `u`"},{"id":"ac1dbec9-bb9b-4fdd-94b1-cfb553605e84","title":"alpha particle molar mass","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:28:37.000Z","updatedAt":"2026-10-03T22:28:37.000Z","text":"alpha particle molar mass = 4.001 506 1833 × 10⁻³ kg mol⁻¹ (CODATA 2022 recommended value, NIST)\n\n- Value: `4.0015061833e-3`\n- Standard uncertainty: `1.2e-12` (relative 3.0 × 10⁻¹⁰)\n- Unit: `kg mol^-1`"},{"id":"74177f6e-a428-4b1f-b61f-7b30b92bf17e","title":"alpha particle-proton mass ratio","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:28:44.000Z","updatedAt":"2026-10-03T22:28:44.000Z","text":"alpha particle-proton mass ratio = 3.972 599 690 252 (CODATA 2022 recommended value, NIST)\n\n- Value: `3.972599690252`\n- Standard uncertainty: `7.0e-11` (relative 1.8 × 10⁻¹¹)\n- Unit: none (dimensionless)"},{"id":"70af49a7-80b9-40b9-bc83-d1e8d0181193","title":"alpha particle relative atomic mass","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:28:50.000Z","updatedAt":"2026-10-03T22:28:50.000Z","text":"alpha particle relative atomic mass = 4.001 506 179 129 (CODATA 2022 recommended value, NIST)\n\n- Value: `4.001506179129`\n- Standard uncertainty: `6.2e-11` (relative 1.5 × 10⁻¹¹)\n- Unit: none (dimensionless)"},{"id":"79bba061-7bc9-4544-9e27-5b36bb399a35","title":"alpha particle rms charge radius","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:28:56.000Z","updatedAt":"2026-10-03T22:28:56.000Z","text":"alpha particle rms charge radius = 1.6785 × 10⁻¹⁵ m (CODATA 2022 recommended value, NIST)\n\n- Value: `1.6785e-15`\n- Standard uncertainty: `2.1e-18` (relative 1.3 × 10⁻³)\n- Unit: `m`"},{"id":"72e38e86-a064-430d-a94b-5ff4aa90d9de","title":"Angstrom star","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:29:02.000Z","updatedAt":"2026-10-03T22:29:02.000Z","text":"Angstrom star = 1.000 014 95 × 10⁻¹⁰ m (CODATA 2022 recommended value, NIST)\n\n- Value: `1.00001495e-10`\n- Standard uncertainty: `9.0e-17` (relative 9.0 × 10⁻⁷)\n- Unit: `m`"},{"id":"5f1674d5-159f-441a-b4e3-82255755ddfe","title":"atomic mass constant","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":2,"createdAt":"2026-10-03T22:29:08.000Z","updatedAt":"2026-10-04T00:26:25.000Z","text":"atomic mass constant = 1.660 539 068 92 × 10⁻²⁷ kg (CODATA 2022 recommended value, NIST)\n\n- Value: `1.66053906892e-27`\n- Standard uncertainty: `5.2e-37` (relative 3.1 × 10⁻¹⁰)\n- Unit: `kg`\n- Also known as: m_u"},{"id":"99396172-a3eb-4438-93b0-adfe67a891ef","title":"atomic mass constant energy equivalent","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:29:14.000Z","updatedAt":"2026-10-03T22:29:14.000Z","text":"atomic mass constant energy equivalent = 1.492 418 087 68 × 10⁻¹⁰ J (CODATA 2022 recommended value, NIST)\n\n- Value: `1.49241808768e-10`\n- Standard uncertainty: `4.6e-20` (relative 3.1 × 10⁻¹⁰)\n- Unit: `J`"},{"id":"6353305e-bd94-4780-b484-c785468a8e91","title":"atomic mass constant energy equivalent in MeV","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:29:20.000Z","updatedAt":"2026-10-03T22:29:20.000Z","text":"atomic mass constant energy equivalent in MeV = 931.494 103 72 MeV (CODATA 2022 recommended value, NIST)\n\n- Value: `931.49410372`\n- Standard uncertainty: `2.9e-7` (relative 3.1 × 10⁻¹⁰)\n- Unit: `MeV`"},{"id":"62d5ad3c-a9e5-4458-af5f-b9c5ddc67ced","title":"atomic mass unit-electron volt relationship","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:29:26.000Z","updatedAt":"2026-10-03T22:29:27.000Z","text":"atomic mass unit-electron volt relationship = 9.314 941 0372 × 10⁸ eV (CODATA 2022 recommended value, NIST)\n\n- Value: `9.3149410372e8`\n- Standard uncertainty: `2.9e-1` (relative 3.1 × 10⁻¹⁰)\n- Unit: `eV`"},{"id":"b617dc9d-8c5b-4027-b361-95a9cad1b1b7","title":"atomic mass unit-hartree relationship","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:29:33.000Z","updatedAt":"2026-10-03T22:29:33.000Z","text":"atomic mass unit-hartree relationship = 3.423 177 6922 × 10⁷ E_h (CODATA 2022 recommended value, NIST)\n\n- Value: `3.4231776922e7`\n- Standard uncertainty: `1.1e-2` (relative 3.2 × 10⁻¹⁰)\n- Unit: `E_h`"},{"id":"55e94f0a-78c3-42ce-9458-180bab5164d2","title":"atomic mass unit-hertz relationship","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:29:39.000Z","updatedAt":"2026-10-03T22:29:39.000Z","text":"atomic mass unit-hertz relationship = 2.252 342 721 85 × 10²³ Hz (CODATA 2022 recommended value, NIST)\n\n- Value: `2.25234272185e23`\n- Standard uncertainty: `7.0e13` (relative 3.1 × 10⁻¹⁰)\n- Unit: `Hz`"},{"id":"e9031d46-01a6-4e0f-87d2-f1fede336e62","title":"atomic mass unit-inverse meter relationship","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:29:45.000Z","updatedAt":"2026-10-03T22:29:45.000Z","text":"atomic mass unit-inverse meter relationship = 7.513 006 6209 × 10¹⁴ m⁻¹ (CODATA 2022 recommended value, NIST)\n\n- Value: `7.5130066209e14`\n- Standard uncertainty: `2.3e5` (relative 3.1 × 10⁻¹⁰)\n- Unit: `m^-1`"},{"id":"5d341ed4-da14-4a45-9a85-aa92e8f34a13","title":"atomic mass unit-joule relationship","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:29:51.000Z","updatedAt":"2026-10-03T22:29:51.000Z","text":"atomic mass unit-joule relationship = 1.492 418 087 68 × 10⁻¹⁰ J (CODATA 2022 recommended value, NIST)\n\n- Value: `1.49241808768e-10`\n- Standard uncertainty: `4.6e-20` (relative 3.1 × 10⁻¹⁰)\n- Unit: `J`"},{"id":"73d031f9-3687-4d3e-8dec-0b1ef499d45a","title":"atomic mass unit-kelvin relationship","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:29:57.000Z","updatedAt":"2026-10-03T22:29:57.000Z","text":"atomic mass unit-kelvin relationship = 1.080 954 020 67 × 10¹³ K (CODATA 2022 recommended value, NIST)\n\n- Value: `1.08095402067e13`\n- Standard uncertainty: `3.4e3` (relative 3.1 × 10⁻¹⁰)\n- Unit: `K`"},{"id":"25f5bd94-d3f5-4581-ab71-08b8da107db8","title":"atomic mass unit-kilogram relationship","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:30:03.000Z","updatedAt":"2026-10-03T22:30:03.000Z","text":"atomic mass unit-kilogram relationship = 1.660 539 068 92 × 10⁻²⁷ kg (CODATA 2022 recommended value, NIST)\n\n- Value: `1.66053906892e-27`\n- Standard uncertainty: `5.2e-37` (relative 3.1 × 10⁻¹⁰)\n- Unit: `kg`"},{"id":"a94601e2-6a3d-4f39-994b-c27a7c76570e","title":"atomic unit of 1st hyperpolarizability","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:30:10.000Z","updatedAt":"2026-10-03T22:30:10.000Z","text":"atomic unit of 1st hyperpolarizability = 3.206 361 2996 × 10⁻⁵³ C³ m³ J⁻² (CODATA 2022 recommended value, NIST)\n\n- Value: `3.2063612996e-53`\n- Standard uncertainty: `1.5e-62` (relative 4.7 × 10⁻¹⁰)\n- Unit: `C^3 m^3 J^-2`"},{"id":"d0e57a2a-dfff-4cbe-b7d6-6e312cf5826c","title":"atomic unit of 2nd hyperpolarizability","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:30:16.000Z","updatedAt":"2026-10-03T22:30:16.000Z","text":"atomic unit of 2nd hyperpolarizability = 6.235 379 9735 × 10⁻⁶⁵ C⁴ m⁴ J⁻³ (CODATA 2022 recommended value, NIST)\n\n- Value: `6.2353799735e-65`\n- Standard uncertainty: `3.9e-74` (relative 6.3 × 10⁻¹⁰)\n- Unit: `C^4 m^4 J^-3`"},{"id":"79842880-0b11-4051-9c90-50582b6ef5b4","title":"atomic unit of action","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:30:22.000Z","updatedAt":"2026-10-03T22:30:22.000Z","text":"atomic unit of action = 1.054 571 817… × 10⁻³⁴ J s (CODATA 2022 recommended value, NIST)\n\n- Value: `1.054571817e-34` (NIST lists only these digits; the exact value continues)\n- Uncertainty: none; the value is exact by definition of the SI\n- Unit: `J s`"},{"id":"353ce2f6-b11f-40f5-b347-380d06c869d5","title":"atomic unit of charge","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:30:28.000Z","updatedAt":"2026-10-03T22:30:28.000Z","text":"atomic unit of charge = 1.602 176 634 × 10⁻¹⁹ C (CODATA 2022 recommended value, NIST)\n\n- Value: `1.602176634e-19`\n- Uncertainty: none; the value is exact by definition of the SI\n- Unit: `C`"},{"id":"5d10f689-3db5-4827-9e67-560323f614a1","title":"atomic unit of charge density","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:30:34.000Z","updatedAt":"2026-10-03T22:30:34.000Z","text":"atomic unit of charge density = 1.081 202 386 77 × 10¹² C m⁻³ (CODATA 2022 recommended value, NIST)\n\n- Value: `1.08120238677e12`\n- Standard uncertainty: `5.1e2` (relative 4.7 × 10⁻¹⁰)\n- Unit: `C m^-3`"},{"id":"3e0ad943-2c73-457b-8e91-1b5558272e24","title":"atomic unit of current","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:30:40.000Z","updatedAt":"2026-10-03T22:30:40.000Z","text":"atomic unit of current = 6.623 618 237 5082 × 10⁻³ A (CODATA 2022 recommended value, NIST)\n\n- Value: `6.6236182375082e-3`\n- Standard uncertainty: `7.2e-15` (relative 1.1 × 10⁻¹²)\n- Unit: `A`"},{"id":"e1724027-168d-498c-8ddd-c52a834902f0","title":"atomic unit of electric dipole mom.","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":2,"createdAt":"2026-10-03T22:30:47.000Z","updatedAt":"2026-10-04T00:26:38.000Z","text":"atomic unit of electric dipole mom. = 8.478 353 6198 × 10⁻³⁰ C m (CODATA 2022 recommended value, NIST)\n\n- Value: `8.4783536198e-30`\n- Standard uncertainty: `1.3e-39` (relative 1.5 × 10⁻¹⁰)\n- Unit: `C m`\n- Also known as: atomic unit of electric dipole moment"},{"id":"cb26838a-b155-4be6-899a-500ddbb5666f","title":"atomic unit of electric field","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:30:53.000Z","updatedAt":"2026-10-03T22:30:53.000Z","text":"atomic unit of electric field = 5.142 206 751 12 × 10¹¹ V m⁻¹ (CODATA 2022 recommended value, NIST)\n\n- Value: `5.14220675112e11`\n- Standard uncertainty: `8.0e1` (relative 1.6 × 10⁻¹⁰)\n- Unit: `V m^-1`"},{"id":"5ce26f02-247a-4c5a-bc3c-94b8e63c915f","title":"atomic unit of electric field gradient","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:30:59.000Z","updatedAt":"2026-10-03T22:30:59.000Z","text":"atomic unit of electric field gradient = 9.717 362 4424 × 10²¹ V m⁻² (CODATA 2022 recommended value, NIST)\n\n- Value: `9.7173624424e21`\n- Standard uncertainty: `3.0e12` (relative 3.1 × 10⁻¹⁰)\n- Unit: `V m^-2`"},{"id":"df389a51-8532-49fb-9364-aa46b4420dd4","title":"atomic unit of electric polarizability","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:31:05.000Z","updatedAt":"2026-10-03T22:31:05.000Z","text":"atomic unit of electric polarizability = 1.648 777 272 12 × 10⁻⁴¹ C² m² J⁻¹ (CODATA 2022 recommended value, NIST)\n\n- Value: `1.64877727212e-41`\n- Standard uncertainty: `5.1e-51` (relative 3.1 × 10⁻¹⁰)\n- Unit: `C^2 m^2 J^-1`"},{"id":"8e2f4dcf-ad0f-4641-9064-b65c6e4a3113","title":"atomic unit of electric potential","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:31:11.000Z","updatedAt":"2026-10-03T22:31:11.000Z","text":"atomic unit of electric potential = 27.211 386 245 981 V (CODATA 2022 recommended value, NIST)\n\n- Value: `27.211386245981`\n- Standard uncertainty: `3.0e-11` (relative 1.1 × 10⁻¹²)\n- Unit: `V`"},{"id":"6f6bef75-91a5-4bb1-bc3b-ed2e7a00535e","title":"atomic unit of electric quadrupole mom.","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":2,"createdAt":"2026-10-03T22:31:17.000Z","updatedAt":"2026-10-04T00:26:52.000Z","text":"atomic unit of electric quadrupole mom. = 4.486 551 5185 × 10⁻⁴⁰ C m² (CODATA 2022 recommended value, NIST)\n\n- Value: `4.4865515185e-40`\n- Standard uncertainty: `1.4e-49` (relative 3.1 × 10⁻¹⁰)\n- Unit: `C m^2`\n- Also known as: atomic unit of electric quadrupole moment"},{"id":"02b8a7f2-58cb-4f5e-a564-781069d76671","title":"atomic unit of energy","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:31:23.000Z","updatedAt":"2026-10-03T22:31:23.000Z","text":"atomic unit of energy = 4.359 744 722 2060 × 10⁻¹⁸ J (CODATA 2022 recommended value, NIST)\n\n- Value: `4.3597447222060e-18`\n- Standard uncertainty: `4.8e-30` (relative 1.1 × 10⁻¹²)\n- Unit: `J`"},{"id":"fb64baae-eec6-4bae-ad2f-01a8c56ee434","title":"atomic unit of force","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:31:29.000Z","updatedAt":"2026-10-03T22:31:29.000Z","text":"atomic unit of force = 8.238 723 5038 × 10⁻⁸ N (CODATA 2022 recommended value, NIST)\n\n- Value: `8.2387235038e-8`\n- Standard uncertainty: `1.3e-17` (relative 1.6 × 10⁻¹⁰)\n- Unit: `N`"},{"id":"d99281ab-a530-4590-bc23-af7f032ea1af","title":"atomic unit of length","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:31:36.000Z","updatedAt":"2026-10-03T22:31:36.000Z","text":"atomic unit of length = 5.291 772 105 44 × 10⁻¹¹ m (CODATA 2022 recommended value, NIST)\n\n- Value: `5.29177210544e-11`\n- Standard uncertainty: `8.2e-21` (relative 1.5 × 10⁻¹⁰)\n- Unit: `m`"},{"id":"29f9e5ef-c0db-42ce-9898-fb4b488ee86f","title":"atomic unit of mag. dipole mom.","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":2,"createdAt":"2026-10-03T22:31:42.000Z","updatedAt":"2026-10-04T00:27:05.000Z","text":"atomic unit of mag. dipole mom. = 1.854 802 013 15 × 10⁻²³ J T⁻¹ (CODATA 2022 recommended value, NIST)\n\n- Value: `1.85480201315e-23`\n- Standard uncertainty: `5.8e-33` (relative 3.1 × 10⁻¹⁰)\n- Unit: `J T^-1`\n- Also known as: atomic unit of magnetic dipole moment"},{"id":"5b533368-0df7-4014-b3ec-4812b596afec","title":"atomic unit of mag. flux density","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":2,"createdAt":"2026-10-03T22:31:48.000Z","updatedAt":"2026-10-04T00:27:19.000Z","text":"atomic unit of mag. flux density = 2.350 517 570 77 × 10⁵ T (CODATA 2022 recommended value, NIST)\n\n- Value: `2.35051757077e5`\n- Standard uncertainty: `7.3e-5` (relative 3.1 × 10⁻¹⁰)\n- Unit: `T`\n- Also known as: atomic unit of magnetic flux density"},{"id":"86236766-ed98-417b-8f0f-c03977b88d83","title":"atomic unit of magnetizability","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:31:54.000Z","updatedAt":"2026-10-03T22:31:54.000Z","text":"atomic unit of magnetizability = 7.891 036 5794 × 10⁻²⁹ J T⁻² (CODATA 2022 recommended value, NIST)\n\n- Value: `7.8910365794e-29`\n- Standard uncertainty: `4.9e-38` (relative 6.2 × 10⁻¹⁰)\n- Unit: `J T^-2`"},{"id":"200772de-a4b4-49cf-a198-16fa1595bf9e","title":"atomic unit of mass","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:32:00.000Z","updatedAt":"2026-10-03T22:32:00.000Z","text":"atomic unit of mass = 9.109 383 7139 × 10⁻³¹ kg (CODATA 2022 recommended value, NIST)\n\n- Value: `9.1093837139e-31`\n- Standard uncertainty: `2.8e-40` (relative 3.1 × 10⁻¹⁰)\n- Unit: `kg`"},{"id":"b7516704-d1ad-4bb0-8ea1-99b397cf1895","title":"atomic unit of momentum","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:32:06.000Z","updatedAt":"2026-10-03T22:32:06.000Z","text":"atomic unit of momentum = 1.992 851 915 45 × 10⁻²⁴ kg m s⁻¹ (CODATA 2022 recommended value, NIST)\n\n- Value: `1.99285191545e-24`\n- Standard uncertainty: `3.1e-34` (relative 1.6 × 10⁻¹⁰)\n- Unit: `kg m s^-1`"},{"id":"7f75fc48-f434-42fb-9c09-a59098907612","title":"atomic unit of permittivity","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:32:13.000Z","updatedAt":"2026-10-03T22:32:13.000Z","text":"atomic unit of permittivity = 1.112 650 056 20 × 10⁻¹⁰ F m⁻¹ (CODATA 2022 recommended value, NIST)\n\n- Value: `1.11265005620e-10`\n- Standard uncertainty: `1.7e-20` (relative 1.5 × 10⁻¹⁰)\n- Unit: `F m^-1`"},{"id":"35b1fb34-474a-4344-9791-17e04054b202","title":"atomic unit of time","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:32:19.000Z","updatedAt":"2026-10-03T22:32:19.000Z","text":"atomic unit of time = 2.418 884 326 5864 × 10⁻¹⁷ s (CODATA 2022 recommended value, NIST)\n\n- Value: `2.4188843265864e-17`\n- Standard uncertainty: `2.6e-29` (relative 1.1 × 10⁻¹²)\n- Unit: `s`"},{"id":"2741147b-d85d-41c5-ab3c-ebb48a35266d","title":"atomic unit of velocity","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:32:25.000Z","updatedAt":"2026-10-03T22:32:25.000Z","text":"atomic unit of velocity = 2.187 691 262 16 × 10⁶ m s⁻¹ (CODATA 2022 recommended value, NIST)\n\n- Value: `2.18769126216e6`\n- Standard uncertainty: `3.4e-4` (relative 1.6 × 10⁻¹⁰)\n- Unit: `m s^-1`"},{"id":"faba1492-5081-4358-a26e-02577c494ca4","title":"Avogadro constant","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":2,"createdAt":"2026-10-03T22:32:31.000Z","updatedAt":"2026-10-04T00:27:32.000Z","text":"Avogadro constant = 6.022 140 76 × 10²³ mol⁻¹ (CODATA 2022 recommended value, NIST)\n\n- Value: `6.02214076e23`\n- Uncertainty: none; the value is exact by definition of the SI\n- Unit: `mol^-1`\n- Also known as: Avogadro's number; Avogadro number; N_A"},{"id":"1d1fb421-7879-42a0-80ee-98aa91821cfe","title":"Bohr magneton","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":2,"createdAt":"2026-10-03T22:32:37.000Z","updatedAt":"2026-10-04T00:27:46.000Z","text":"Bohr magneton = 9.274 010 0657 × 10⁻²⁴ J T⁻¹ (CODATA 2022 recommended value, NIST)\n\n- Value: `9.2740100657e-24`\n- Standard uncertainty: `2.9e-33` (relative 3.1 × 10⁻¹⁰)\n- Unit: `J T^-1`\n- Also known as: mu_B"},{"id":"78215477-376d-449a-acae-21e022a61677","title":"Bohr magneton in eV/T","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:32:43.000Z","updatedAt":"2026-10-03T22:32:43.000Z","text":"Bohr magneton in eV/T = 5.788 381 7982 × 10⁻⁵ eV T⁻¹ (CODATA 2022 recommended value, NIST)\n\n- Value: `5.7883817982e-5`\n- Standard uncertainty: `1.8e-14` (relative 3.1 × 10⁻¹⁰)\n- Unit: `eV T^-1`"},{"id":"9200834c-9f00-4cc9-a8e5-04a5cd7f0037","title":"Bohr magneton in Hz/T","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":2,"createdAt":"2026-10-03T22:32:50.000Z","updatedAt":"2026-10-03T23:34:27.000Z","text":"Bohr magneton in Hz/T = 1.399 624 491 71 × 10¹⁰ Hz T⁻¹ (CODATA 2022 recommended value, NIST)\n\n- Value: `1.39962449171e10`\n- Standard uncertainty: `4.4` (relative 3.1 × 10⁻¹⁰)\n- Unit: `Hz T^-1`"},{"id":"e88cff1b-c960-4f73-81f1-8c535707995b","title":"Bohr magneton in inverse meter per tesla","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:32:56.000Z","updatedAt":"2026-10-03T22:32:56.000Z","text":"Bohr magneton in inverse meter per tesla = 46.686 447 719 m⁻¹ T⁻¹ (CODATA 2022 recommended value, NIST)\n\n- Value: `46.686447719`\n- Standard uncertainty: `1.5e-8` (relative 3.2 × 10⁻¹⁰)\n- Unit: `m^-1 T^-1`"},{"id":"c795e4a2-30ff-4839-9610-ebaaecf4bfdf","title":"Bohr magneton in K/T","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":1,"createdAt":"2026-10-03T22:33:02.000Z","updatedAt":"2026-10-03T22:33:02.000Z","text":"Bohr magneton in K/T = 0.671 713 814 72 K T⁻¹ (CODATA 2022 recommended value, NIST)\n\n- Value: `0.67171381472`\n- Standard uncertainty: `2.1e-10` (relative 3.1 × 10⁻¹⁰)\n- Unit: `K T^-1`"},{"id":"a3c295c5-3444-4a10-9a73-75c9b5fef968","title":"Bohr radius","sourceUrl":"https://physics.nist.gov/cuu/Constants/Table/allascii.txt#codata-2022","version":2,"createdAt":"2026-10-03T22:33:09.000Z","updatedAt":"2026-10-04T00:27:59.000Z","text":"Bohr radius = 5.291 772 105 44 × 10⁻¹¹ m (CODATA 2022 recommended value, NIST)\n\n- Value: `5.29177210544e-11`\n- Standard uncertainty: `8.2e-21` (relative 1.5 × 10⁻¹⁰)\n- Unit: `m`\n- Also known as: a_0"}]}