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Capacitor Energy Calculator

Stored capacitor energy = capacitance × voltage² / 2. Ideal linear capacitor; no leakage, dielectric nonlinearity or discharge model.

Free to useNo sign-upRuns in your browser
Enter your details

Enter the inputs, then select Calculate.

Your result
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Result will appear here

How Capacitor Energy Calculator works

Stored capacitor energy = capacitance × voltage² / 2.

Ideal linear capacitor; no leakage, dielectric nonlinearity or discharge model. Finite real inputs; output uses up to 12 significant digits. Floating-point results may be rounded.

Concept diagram for Capacitor Energy Calculator, showing capacitance (f) input and the supported output.
Concept diagram; the three operation images are actual browser captures.

How to use Capacitor Energy Calculator

Follow the labelled inputs.

Enter capacitance (f)

Replace the example with capacitance (f). The field labels specify the expected format and units.

Input and settings
Capacitor Energy Calculator: input and settings in the implemented browser tool
Actual local browser view. Open the image to read it at full size.

Check the remaining inputs

Set voltage (v). Ideal linear capacitor; no leakage, dielectric nonlinearity or discharge model.

Tool result
Capacitor Energy Calculator: tool result in the implemented browser tool
Actual local browser view. Open the image to read it at full size.

Run, review and save

Select Calculate. Review the calculated result, then copy it or download the result text.

Review the details
Capacitor Energy Calculator: review the details in the implemented browser tool
Actual local browser view. Open the image to read it at full size.

Examples and uses for Capacitor Energy Calculator

Check the supplied example

The starting example produces 0.1 J. Stored capacitor energy = capacitance × voltage² / 2.

Abstract input values and a mathematical worksheet.
Start with the values. Concept illustration.

Use your own inputs

Read the labels for capacitance (f) and voltage (v). Ideal linear capacitor; no leakage, dielectric nonlinearity or discharge model.

Two calculation examples shown for comparison.
Compare a second example. Concept illustration.

Record a reviewed result

Copy the calculated result into your notes. Keep the formula and assumptions with it if someone else needs to reproduce the calculation.

A calculation and supporting explanation represented conceptually.
Explain the calculation. Concept illustration.

How to read the result

Read the units and assumptions with the output.

Stored capacitor energy = capacitance × voltage² / 2.

Ideal linear capacitor; no leakage, dielectric nonlinearity or discharge model. Finite real inputs; output uses up to 12 significant digits. Floating-point results may be rounded.

A mathematical result connected to the values used to calculate it.
Read the result with its inputs. Concept illustration.

Supported input and limits

Check the stated scope before you run it.

Ideal linear capacitor; no leakage, dielectric nonlinearity or discharge model. Finite real inputs; output uses up to 12 significant digits. Floating-point results may be rounded.

The input stays in this browser. Copy result and Download save the same displayed text.

Values and units reviewed before relying on a mathematical result.
Check values and units. Concept illustration.

Capacitor Energy Calculator: common questions

Answers about using Capacitor Energy Calculator and understanding its results.

What assumptions and input limits apply?

Ideal linear capacitor; no leakage, dielectric nonlinearity or discharge model. Finite real inputs; output uses up to 12 significant digits. Floating-point results may be rounded.

How can I save the output?

Use Copy result to copy the displayed text, or Download to save it as a text file. The tool runs in your browser and does not require an account.

Calculate with your input

Check the calculated result, then copy or download it.

Calculate