Rc Time Constant Calculator
Calculate RC circuit time constant and charging/discharging curves. Enter values for instant results with step-by-step formulas.
Reviewed by Daniel Agrici, Founder & Lead Developer
Reviewed by Daniel Agrici, Founder & Lead Developer
Formula
ฯ = R ร C | V(t) = Vโ(1 - e^(-t/ฯ)) charging | V(t) = Vโ ร e^(-t/ฯ) discharging
The RC time constant ฯ is the time to charge to 63.2% (or discharge to 36.8%). After 5ฯ, the circuit is >99% complete.
Worked Examples
Example 1: 10kฮฉ + 1ฮผF
Problem:R=10kฮฉ, C=1ฮผF
Solution:ฯ = 10000 ร 0.000001 = 0.01 s = 10 ms
Result:10 ms
Reviewed by Daniel Agrici, Founder & Lead Developer ยท Editorial policy