How to use the capacitive reactance calculator
Find the opposition a capacitor presents to alternating current at a given frequency. Enter frequency, capacitance in the fields above; the capacitive reactance is computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “capacitor AC resistance”, “Xc”, “reactance of capacitor at frequency”, “calculate capacitive reactance”, “find capacitive reactance”.
Formula
Variables
- f — Frequency (Hz)
- C — Capacitance (µF)
Worked example
With frequency = 60 Hz, capacitance = 100 µF, the calculator gives capacitive reactance ≈ 26.52582 Ω.
Frequently asked questions
What is the capacitive reactance calculator used for?
Find the opposition a capacitor presents to alternating current at a given frequency. It helps with questions such as “capacitor AC resistance”, “Xc”, “reactance of capacitor at frequency”.
What is the formula for the capacitive reactance calculation?
Capacitive reactance (Ω) = 1 / (2 × π × f × C × 1e-6). Here f is frequency (Hz), C is capacitance (µF).
What inputs do I need for the capacitive reactance calculator?
You need frequency in Hz, capacitance in µF. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the capacitive reactance calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the capacitive reactance result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.