# Fraction Calculator

> Add, subtract, multiply and divide fractions, with the result simplified.

To calculate with fractions, enter two fractions and choose an operation. Addition and subtraction use a common denominator, multiplication multiplies across, and division multiplies by the reciprocal. The answer is reduced and also shown as a mixed number, decimal and percentage.

**URL:** https://convertto.tech/t/fraction-calculator
**Category:** Calculators (https://convertto.tech/c/calculators)
**Privacy:** Runs entirely in the browser; no upload
**Cost:** Free, no sign-up
**Last updated:** 2026-08-01

## Key facts

- **Privacy:** Runs entirely in your browser — nothing is uploaded
- **Cost:** Free, unlimited, no sign-up

## How to use

1. Enter or paste your first fraction.
2. Choose the operation.
3. Enter or paste your second fraction.
4. The result appears immediately — copy or download it.

## FAQ

### Why do fractions need a common denominator to add?

Because the denominator defines the size of each part. Adding thirds to quarters is adding two different units — converting both to twelfths makes the parts the same size, and only then can the numerators be added.

### What is an improper fraction?

One whose numerator is at least as large as its denominator, such as 7/4. It is perfectly valid and often easier to compute with than the mixed number 1¾, which is why calculators work in improper form and convert only at the end.

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