Does it simplify results automatically?

Yes, all arithmetic results are automatically reduced to lowest terms.

Can I convert a decimal to a fraction?

Yes, use the Decimal ⇄ Fraction tab to convert either direction.

Are negative fractions supported?

Yes, negative numerators and denominators are handled correctly.

Is my data uploaded to a server?

No. This tool runs entirely in your browser using standard web APIs, so your input never leaves your device and nothing is logged or stored on our servers.

Does it work offline and on mobile?

Yes. Once the page has loaded it keeps working without a network connection, and the layout is responsive so it stays usable on phones and tablets.

Fraction Calculator

Add, subtract, multiply, divide, and simplify fractions.

Support

Works Offline

Privacy First

No Login

No API

Fraction Calculator

Arithmetic, simplification, and decimal conversion

Numerator 1

Denominator 1

Operator

Numerator 2

Denominator 2

Result

Updates live

Arithmetic result

5 / 6

As decimal

0.83333333

Simplified

3 / 4

Fraction from decimal

3 / 4

About the Fraction Calculator

Perform arithmetic on fractions, simplify any fraction to lowest terms, and convert freely between decimals and fractions.

Examples

1/2 + 1/3

1/2 + 1/3

Output

5/6

Keyboard shortcuts

Copy the main outputCtrl / ⌘ + Shift + C
Download the resultCtrl / ⌘ + S
Share this toolCtrl / ⌘ + Shift + S
Reset the inputsAlt + R
Open the tool search paletteCtrl / ⌘ + K

Related tools

Logarithm & Exponent Calculator

Math & Numbers

Compute logarithms of any base and exponentiation results.

Number Sequence Generator

Math & Numbers

Generate arithmetic, geometric, or Fibonacci-like number sequences.

Prime Checker

Math & Numbers

Check primality, factorize numbers, list primes, and compute GCD/LCM.

Quadratic Equation Solver

Math & Numbers

Solve ax² + bx + c = 0 with real or complex roots.

Scientific Notation Converter

Math & Numbers

Convert between decimal, scientific, and engineering notation.

BMI Calculator

Math & Numbers

Calculate your Body Mass Index and healthy weight range.

Frequently asked questions

Version 1.0.0 · Updated 2026-08-06 · Runs entirely in your browser