Capacitive Reactance Calculator

Reactance is a capacitor's opposition to AC current.

HVAC Pro calculator — inputs, formula and example are open to everyone.

Result

Results for this calculator are part of HVAC Pro

You can see the inputs, formula and worked example. Unlock results for every Pro calculator.

Unlock with HVAC Pro

Already a member? Sign in

Formula

Xc = 1 ÷ (2π × f × C)

Example calculation

45 µF at 60 Hz → 58.9 Ω.

Practical HVAC use

Understanding motor capacitor circuits.

Common mistakes

Forgetting to convert µF to farads.

Related calculators

Capacitor µF Test

Pro

Calculate a run capacitor's actual µF from measured current and voltage (µF = 2652 × A ÷ V at 60 Hz).

Power Factor

Pro

Calculate power factor and phase angle from real power, voltage and current.

Educational tool. Results are estimates from the stated formulas; always confirm with manufacturer data and the code adopted in your jurisdiction. All calculators