Capacitors & Reactance

Capacitive Reactance Calculator

Capacitive Reactance 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.

Inputs

Frequency

Hz / kHz

Capacitance

pF / nF / µF / mF / F

Calculations run in your browser. Entered electrical values are not uploaded to our server.

ⓘMathematical estimate only. Verify equipment datasheets, manufacturer instructions, electrical codes and qualified design before real-world use.

Formula & method

XC = 1 / (2πfC)

Worked example

50 Hz and 100 µF → ≈ 31.831 Ω

Assumptions & safety boundary

Mathematical estimate only. Verify equipment datasheets, manufacturer instructions, electrical codes and qualified design before real-world use.