RC Charge Time Calculator

τ = RC

Resistance

Ω

Capacitance

µF

Supply voltage

V

Initial voltage

V

Target voltage

V

Quick targets

Assumes an ideal RC circuit. Leakage, component tolerance, ESR, and input impedance can change real timing.

Time to target

999.67 ms

Time constant τ: 1 s · Target ratio: 63.2%

Time constant τ

1 s

~99% settle time

5 s

Final voltage

5 V

Target ratio

63.2%