Capacitor Charge Calculator

RC circuit transient time constant solver, charge/discharge curves, stored energy, and total charge.

Component Specifications

Resistance

Capacitance

Supply Voltage (V)

Solve at Specific Time

Time elapsed

Voltage:3.1606 V

% Charged:63.2%

RC Constant (τ)

1000.000 ms

Stored Energy:1.250 mJ

Total Charge (Q):500.000 µC

Charging curve steps

Time Interval	Voltage (V)	% Charged
0 (0τ)	0.0000 V	0.0%
1000.000 ms (1τ)	3.1606 V	63.2%
2.000 s (2τ)	4.3233 V	86.5%
3.000 s (3τ)	4.7511 V	95.0%
4.000 s (4τ)	4.9084 V	98.2%
5.000 s (5τ)	4.9663 V	99.3%

RC Time Constants & Physics Formulas

The RC time constant, denoted by the Greek letter $\tau$ (tau), is the timeframe required to charge a capacitor through a series resistor to approximately 63.2% of the source voltage. Formula:\tau = R \times C.

During discharge, the remaining voltage decays exponentially: V(t) = V_{supply} \times e^-t/ au. Total stored electrical charge is defined by $Q = C \times V$ in Coulombs, while electrostatic potential energy is computed as $E = \frac12 C V^2$ in Joules.

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