How to calculate capacitive reactance?

Fill in frequency and capacitance in the Capacitive Reactance Calculator above and your capacitive reactance is calculated instantly. Change any value to see how the result responds.

Is this calculator free to use?

Yes — every calculator on this site is completely free, with no sign-up or account required.

How accurate is this calculator?

It uses the standard formula and calculates on our server for every request, so results are precise for the values you enter.

Is my data saved anywhere?

No. Nothing you enter is stored or sent anywhere unless you choose to share a link with your values included.

Capacitive Reactance Calculator

Electrical & Engineering · AC Circuits

Quick answer

If frequency is 50 Hz and capacitance is 0.00001 F, the capacitive reactance is 318.3099 Ω.

Enter your values

Frequency

Capacitance

Capacitive reactance

318.3099Ω

Capacitive reactance — how strongly the capacitor opposes alternating current at this frequency.

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See how the result changes

Each table re-runs this calculator with one value changed and everything else left as it is.

Capacitive reactance by frequency

If frequency goes from 50 Hz to 75 Hz, capacitive reactance changes from 318.3099 Ω to 212.2066 Ω (−33%).

Capacitive reactance for different values of Frequency
Frequency	Capacitive reactance
25 Hz	636.6198 Ω
37.5 Hz	424.4132 Ω
50 Hzstart	318.3099 Ω
75 Hz	212.2066 Ω
100 Hz	159.1549 Ω

Capacitive reactance by capacitance

If capacitance goes from 0.00001 F to 0.000015 F, capacitive reactance changes from 318.3099 Ω to 212.2066 Ω (−33%).

Capacitive reactance for different values of Capacitance
Capacitance	Capacitive reactance
0.000005 F	636.6198 Ω
0.000008 F	424.4132 Ω
0.00001 Fstart	318.3099 Ω
0.000015 F	212.2066 Ω
0.00002 F	159.1549 Ω

ELECTRICAL & ENGINEERING GUIDE

A quick guide to Capacitive Reactance

Use it to get an accurate capacitive reactance in seconds — free, with no sign-up.

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See your capacitive reactance the moment you enter your numbers.
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The same standard formula runs on our server for every calculation.

How to Use the Capacitive Reactance Calculator

Enter Frequency

Provide your frequency, in Hz.

Enter Capacitance

Provide your capacitance, in F.

View Your Results

Get your capacitive reactance instantly, calculated on our server.

What is Capacitive Reactance?

This electrical & engineering tool works out your capacitive reactance instantly, so you don't have to do the math by hand.

“One quick calculation, so you always know your capacitive reactance before you decide.”

What Affects Your Capacitive reactance

Your capacitive reactance depends on the values below.

Frequency
Changing your frequency changes your capacitive reactance.
Capacitance
Changing your capacitance changes your capacitive reactance.

Example Result

Here's what you can expect from a capacitive reactance calculation:

Frequency: 50 Hz
Capacitance: 0.00001 F
Capacitive reactance: 318.3099 Ω

Frequently Asked Questions

How does frequency affect capacitive reactance?: If frequency goes from 50 Hz to 75 Hz, capacitive reactance changes from 318.3099 Ω to 212.2066 Ω (−33%).
How does capacitance affect capacitive reactance?: If capacitance goes from 0.00001 F to 0.000015 F, capacitive reactance changes from 318.3099 Ω to 212.2066 Ω (−33%).
How to calculate capacitive reactance?: Fill in frequency and capacitance in the Capacitive Reactance Calculator above and your capacitive reactance is calculated instantly. Change any value to see how the result responds.
What does an example capacitive reactance calculation look like?: If frequency is 50 Hz and capacitance is 0.00001 F, the capacitive reactance is 318.3099 Ω.
Is this calculator free to use?: Yes — every calculator on this site is completely free, with no sign-up or account required.
How accurate is this calculator?: It uses the standard formula and calculates on our server for every request, so results are precise for the values you enter.
Is my data saved anywhere?: No. Nothing you enter is stored or sent anywhere unless you choose to share a link with your values included.

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