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RC Time Constant Calculator
Calculate RC circuit time constant, charge/discharge time and voltage curves
Ω
µF
V
V
Result
Formula
τ = R × C
Charging: V(t) = Vs(1 − e−t/τ)
Discharging: V(t) = Vs × e−t/τ
| τ | Charging % | Discharging % |
|---|---|---|
| 1τ | 63.2% | 36.8% |
| 2τ | 86.5% | 13.5% |
| 3τ | 95.0% | 5.0% |
| 4τ | 98.2% | 1.8% |
| 5τ | 99.3% | 0.7% |
