Formula & method
τ = R × C
Worked example
1 kΩ × 100 µF = 0.1 s
Assumptions & safety boundary
Mathematical estimate only. Verify equipment datasheets, manufacturer instructions, electrical codes and qualified design before real-world use.
Capacitors & Reactance
RC Time Constant Calculator
RC Time Constant Calculator. Series/parallel capacitance, RC time constant and AC reactance calculations. Calculations run in your browser. Entered electrical values are not uploaded to our server.
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Calculations run in your browser. Entered electrical values are not uploaded to our server.