Elementary charge = 1.602 176 634 × 10−19 C
- Symbol
- e
- Value
- 1.602 176 634 × 10−19
- Unit
- C
- Uncertainty
- exact (by definition)
- Copy-ready
1.602176634e-19
Defines the ampere. The charge of a proton; an electron carries −e.
NIST, Fundamental Physical Constants — Complete Listing (2022 CODATA adjustment), retrieved 2026-07-26.
The seven SI defining constants
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