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Physical constants sheet

All 27 physical constants in PhysRef on one sheet, grouped by family, with symbol, value at full published precision, unit and — where the data carries one — the published uncertainty.

Physical constants sheet

27 rows · 6 sections · PhysRef · sample of the first 6 rows

Physical constants sheet. All 27 physical constants in PhysRef on one sheet, grouped by family, with symbol, value at full published precision, unit and — where the data carries one — the published uncertainty.
ConstantSymbolValueUnitUncertainty
Universal
Speed of Light in Vacuum 1c299,792,458m/snot defined
Gravitational ConstantG6.674 × 10⁻¹¹N·m²/kg²0.00015 × 10⁻¹¹
Planck Constant 1h6.626 070 15 × 10⁻³⁴J·snot defined
Reduced Planck Constant 1ℏ1.054 571 817… × 10⁻³⁴J·snot defined
Electromagnetic
Elementary Charge 1e1.602 176 634 × 10⁻¹⁹Cnot defined
Coulomb Constant 1k8.988 × 10⁹N·m²/C²not defined

Values follow CODATA and the 2019 SI redefinition, at the precision the PhysRef dataset records. Every constant here is free to browse and search in the constants explorer.

Every row on this sheet is also free on its own page — browse the constants explorer. Premium pays for the sheet, not the physics.