🔬Physics Constants (CODATA)
25 physics and chemistry constants — speed of light, Planck constant, elementary charge, Avogadro number and more — at CODATA values. Search by name, symbol, or unit; copy in calculator-friendly e-notation.
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How to use
- 1Search by name (Planck), symbol (h), or unit (J·s).
- 2Press Copy to get calculator-ready e-notation like 6.626e-34.
- 3Paste straight into the scientific calculator tool.
FAQ
Where do the values come from?+
CODATA 2018 recommended values. c, h, e, k_B and N_A are exact since the 2019 SI redefinition.
What format does Copy use?+
Exponential display is converted to calculator-friendly e-notation.
Are chemistry constants included?+
Yes — Avogadro number, gas constant R, Faraday constant, molar volume and more.