- Symbol
- ε₀
- Value
- 8.854 187 8188 × 10−12
- Unit
- F·m⁻¹
- Uncertainty
- 0.000 000 0014 × 10⁻¹²
- Copy-ready
8.8541878188e-12
The electric constant, 1/(μ₀c²). Sets the strength of the Coulomb force.
NIST, Fundamental Physical Constants — Complete Listing (2022 CODATA adjustment), retrieved 2026-07-26.
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