RC Time Constant
Find capacitor charging time scales for an ideal RC circuit.
Your numbers
Time constant
Idealized SI-unit educational model. Real components, tolerances, losses and safe operating limits require separate verification.
Scenario comparison
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Formula
τ=RC; t99=−τln(0.01)
Find capacitor charging time scales for an ideal RC circuit.
Worked example
- Resistance (Ω)
- 1000
- Capacitance (µF)
- 100
- Time constant
- 0.1 s
- Time to 99% of step voltage
- 0.460517018599 s
Scope and limitations
Idealized SI-unit educational model. Real components, tolerances, losses and safe operating limits require separate verification.
Inputs are checked for missing values and allowed ranges. A result outside the finite numeric range is not displayed. Rounding affects display, while the calculation uses the model’s numeric precision.
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Formula version: a0eb5ed483ae · Example checked: