Capacitance Calculator

Calculate capacitance from electric charge and potential difference. Enter your own values below to see capacitance and check the method behind it.

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Your inputs

Change the example values to match your situation.

Your result

Let’s work it out.

Fill in your inputs and select Calculate.
Your result and breakdown will appear here.

How this calculator works

Capacitance = charge ÷ voltage. Output is converted from farads to microfarads.

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What is Capacitance Calculator?

Capacitance Calculator helps you calculate capacitance from electric charge and potential difference.

The main result is capacitance. The formula, example and assumptions below explain how to interpret it.

How to use Capacitance Calculator

Use the example to get familiar with the form, then enter your own figures. Any rates in the example are illustrative. Check the field labels and units before calculating.

  1. Gather stored electric charge (C) and voltage across capacitor (V). Use values from the same situation or reporting period.
  2. Replace the example stored electric charge with your own value, then complete the other fields. Check the displayed units.
  3. Select Calculate and read capacitance. Change one input and calculate again to compare a second scenario. Reset restores the original example.
  • Enter stored electric charge in C, at least 0. Decimals are accepted.
  • Enter voltage across capacitor in V, at least 0.000001. Decimals are accepted.

Capacitance Calculator: a worked example

With the inputs below, the result is 100 µF (capacitance). Follow the example, then replace these illustrative values with your own.

Example inputs and output
Input or outputExample value
Stored electric charge (C)0.001 C
Voltage across capacitor (V)10 V
Capacitance100 µF

Understanding the Capacitance result

The main output is capacitance, expressed in µF. It applies to the inputs and operation you selected.

Displayed results use a readable number of decimal places. When checking a result by hand, keep extra precision until the last step. To compare scenarios, change one input at a time and keep the others fixed.

Capacitance Calculator: assumptions and common mistakes

A useful estimate starts with the right inputs. Check the following assumptions and limits before applying the result to your situation.

  • DC, single-phase and three-phase calculations use different relationships. Equipment selection also depends on installation conditions and applicable standards.

For wider guidance, visit Bureau of Indian Standards. The formula and scope of this specific tool are stated on this page.

Capacitance Calculator FAQs

What does Capacitance Calculator calculate?

Capacitance Calculator helps you calculate capacitance from electric charge and potential difference. Its main output is capacitance in µF.

What inputs do I need for Capacitance Calculator?

You need stored electric charge (C) and voltage across capacitor (V). Use the field labels and units to match your figures to the formula.

Which formula does Capacitance Calculator use?

Capacitance = charge ÷ voltage. Output is converted from farads to microfarads.

What is a worked example for Capacitance Calculator?

Example inputs: Stored electric charge: 0.001 C; Voltage across capacitor: 10 V. The result is 100 µF (capacitance).

How should I enter stored electric charge?

Enter stored electric charge in C, at least 0. Decimals are accepted.

How do I choose voltage across capacitor?

Enter voltage across capacitor in V, at least 0.000001. Decimals are accepted. The example uses 10 V; replace it if your circumstances differ.

How should I read capacitance?

The main output is capacitance, expressed in µF. It applies to the inputs and operation you selected.

Why might my Capacitance Calculator result differ from my records?

DC, single-phase and three-phase calculations use different relationships. Equipment selection also depends on installation conditions and applicable standards. Differences in entered values, units or rounding can also change the comparison.

Can I compare two scenarios in Capacitance Calculator?

Yes. Note your first capacitance, change stored electric charge or another input, and select Calculate again. Editing a field clears the old result so it is not mistaken for a new calculation.

Is Capacitance Calculator free, and where are my inputs calculated?

This calculator is free to use without signing in. Its formula runs in your browser; calculator inputs are not sent to a calculation API. The inputs reset to the example values when you reset the form or start a fresh page.