Capacitor charge & energy calculator

Q = C × V (charge stored). E = ½ × C × V² (energy stored). I_avg = Q ÷ t (average current over charging time).

Charge Q
0
Energy E
0
I avg (during t)
0
Power dissipated
0

Reference

  • Coulombs: 1 C = 1 A·s. A 1000 µF cap charged to 12 V holds 0.012 C and 0.072 J.
  • Equivalent capacitance: series 1/C = Σ1/Cᵢ. Parallel C = ΣCᵢ.
  • Time constant: τ = R × C. 5τ is fully charged (>99%). See RC time constant.