Spherical Capacitor Calculator
Free calculate capacitance of spherical capacitors. determine capacitance from inner radius, outer radius, and permittivity using c = 4πε₀r₁r₂/(r₂-r₁).
Input Parameters
Vacuum: 1.0, Air: ~1.0, Water: 80
Results
Enter radii to calculate capacitance
Spherical Capacitor Formula
Capacitance
C = 4πε₀εᵣr₁r₂ / (r₂ - r₁)
Where:
- • C = capacitance (F)
- • ε₀ = vacuum permittivity (8.85×10⁻¹² F/m)
- • εᵣ = relative permittivity
- • r₁ = inner radius (m)
- • r₂ = outer radius (m)
Note
For r₂ >> r₁, this approximates a single sphere: C ≈ 4πε₀εᵣr₁