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Fraction Calculator

Add, subtract, multiply or divide two fractions. Integer terms only; denominators must be nonzero.

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

Enter the inputs, then select Calculate result.

Your result
Enter your details

Result will appear here

How Fraction Calculator works

Add, subtract, multiply or divide two fractions.

Integer terms only; denominators must be nonzero. Dividing by a zero fraction is rejected. Exact reduced output uses a positive denominator.

Concept diagram for Fraction Calculator, showing first numerator input and the supported output.
Concept diagram; the three operation images are actual browser captures.

How to use Fraction Calculator

Follow the labelled inputs.

Enter first numerator

Replace the example with first numerator. The field labels specify the expected format and units.

Input and settings
Fraction 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 first denominator, operation, second numerator, second denominator. Integer terms only; denominators must be nonzero.

Tool result
Fraction 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 result. Review the calculated result, then copy it or download the result text.

Review the details
Fraction 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 Fraction Calculator

Check the supplied example

The starting example produces 1/2. Add, subtract, multiply or divide two fractions.

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

Use your own inputs

Read the labels for first numerator and first denominator, operation, second numerator, second denominator. Integer terms only; denominators must be nonzero.

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.

Add, subtract, multiply or divide two fractions.

Integer terms only; denominators must be nonzero. Dividing by a zero fraction is rejected. Exact reduced output uses a positive denominator.

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.

Integer terms only; denominators must be nonzero. Dividing by a zero fraction is rejected. Exact reduced output uses a positive denominator.

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.

Fraction Calculator: common questions

Answers about using Fraction Calculator and understanding its results.

Which inputs does this tool accept?

Integer terms only; denominators must be nonzero. Dividing by a zero fraction is rejected. Exact reduced output uses a positive denominator.

Can I copy or download the result?

Yes. Copy result copies the displayed text, and Download saves the same result as a text file. Calculations run in your browser without an account.

Calculate result with your input

Check the calculated result, then copy or download it.

Calculate result