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Fraction Calculator — Add, Subtract, Multiply, Divide

Add, subtract, multiply and divide fractions with automatic simplification, decimal and mixed-number output. Client-side.

Free No signup Client-side Privacy friendly Updated
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How to use

  1. 1 Enter the numerator and denominator of each fraction.
  2. 2 Choose an operation: + − × ÷.
  3. 3 The answer is shown fully simplified, plus decimal and mixed-number forms.

Why use this tool

  • Add, subtract, multiply and divide fractions with automatic simplification.
  • See the result as a simplified fraction, a decimal, and a mixed number.
  • Runs entirely in your browser. No signup.

Frequently asked questions

How do you add two fractions?

Give them a common denominator, add the numerators, then simplify: a/b + c/d = (a·d + c·b) / (b·d).

How is the fraction simplified?

Both numerator and denominator are divided by their greatest common divisor (GCD).

What is a mixed number?

An improper fraction written as a whole number plus a proper fraction, e.g. 7/3 = 2 1/3.

Can it handle negative fractions?

Yes — enter a negative numerator or denominator and the sign is normalised in the result.

What is Fraction Calculator?

A fraction calculator performs arithmetic on two fractions and returns the result fully simplified, along with its decimal value and mixed-number form.

Features

Four operations

Add, subtract, multiply, and divide fractions with exact integer arithmetic.

Auto-simplify

Reduces the answer to lowest terms by dividing through the GCD.

Free & private

Runs on your device — nothing is uploaded.

Example

Input

1/2 + 1/3

Output

5/6

Common use cases

  1. 1

    Homework & study

    Check fraction arithmetic and see the reduced result.

  2. 2

    Recipes & measurements

    Combine fractional quantities when scaling a recipe or plan.

  3. 3

    Ratios & proportions

    Compute and simplify ratios expressed as fractions.

Summary

Zerethon's fraction calculator adds, subtracts, multiplies, and divides two fractions in your browser and reduces the result to lowest terms using the greatest common divisor. Everything runs client-side — nothing is uploaded.

Category
Math
Pricing
Free
Privacy
Browser-based
Signup
Not required

References

Privacy

Your data never leaves your browser unless explicitly stated. Fraction Calculator runs entirely client-side — no server upload, no logging, no tracking of your input.

Compare

LCM vs GCD

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