Capacitor Energy & RC Time Calculator

Calculate charge stored (Q), energy stored (E), and RC time constant (τ).

µF
V
Result
Ω
µF
RC Time Constant

Formulas

  • Charge: Q (µC) = C (µF) × V
  • Energy: E (J) = ½ × C × V² (C in Farads)
  • RC time constant: τ (s) = R (Ω) × C (F)
  • Charged to 63.2% at 1τ, 99.3% at 5τ