RC Time Constant Calculator
Calculate charging and discharging times for RC circuits
RC Circuit Calculator
Enter resistor and capacitor values to calculate time constants
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RC Circuit Reference
How RC time constants work
Time Constant Formula:
τ = R × C
Charging Times:
- 1τ: 63.2% charged
- 2τ: 86.5% charged
- 3τ: 95.0% charged
- 4τ: 98.2% charged
- 5τ: 99.3% charged
Discharging Times:
- 1τ: 36.8% remaining
- 2τ: 13.5% remaining
- 3τ: 5.0% remaining
- 4τ: 1.8% remaining
- 5τ: 0.7% remaining
Corner Frequency:
f₀ = 1/(2π × R × C)
RC circuits are fundamental in electronics, used for timing, filtering, coupling, and decoupling applications. The time constant τ determines how quickly the circuit responds to changes.
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