Capacitive Reactance Table: Capacitive reactance by Frequency
Reference table of capacitive reactance for Capacitive Reactance across a range of frequency values — exact, engine-computed figures you can read off at a glance.
Capacitive Reactance Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Capacitive reactance
31.831
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Capacitive Reactance Calculator
The Capacitive Reactance Calculator works out your capacitive reactance in an instant. Enter frequency and capacitance and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the frequency.
- Enter the capacitance.
- Read off your capacitive reactance — the calculator updates automatically, with no button to press.
Formula
The Capacitive Reactance Calculator uses the formula:
Capacitive reactance = 1 ÷ (2 × 3.141592653589793 × Frequency × (Capacitance ÷ 1000000))
Worked example
For example, with frequency of 50 Hz and capacitance of 100 µF, the capacitive reactance is 31.831.
| Frequency | 50 Hz |
|---|---|
| Capacitance | 100 µF |
| Capacitive reactance | 31.831 |
|---|
Results are estimates for educational use, not professional advice.
Frequently asked questions
Use Xc = 1 ÷ (2πfC). At 50 Hz with a 100 µF capacitor, the reactance is about 31.8 ohms.
It is the opposition a capacitor offers to alternating current, measured in ohms. It falls as frequency or capacitance rises.
A capacitor charges and discharges faster at higher frequencies, letting more current flow, so its reactance drops.
Effectively yes. At zero frequency the reactance is infinite, so a capacitor blocks steady DC while passing AC.
Enter the frequency. Enter the capacitance. Read off your capacitive reactance — the calculator updates automatically, with no button to press.
Related guides
How to Calculate Capacitive Reactance: Formula, Steps & Examples
Learn how to calculate Capacitive Reactance — the formula explained step by step, with worked examples and a free calculator to check your answer.