BROWSER · Exact BigInt rational arithmetic (local JavaScript)

Fraction Calculator

Калькулятор дробей

Добавлено 2026-09-12Обновлено 2026-09-13

Calculate fractions exactly, simplify them, convert finite decimals to fractions and view mixed-number and decimal results. Runs locally with BigInt.

✓ Exact fraction arithmetic using browser BigInt✓ Add, subtract, multiply and divide fractions✓ Simplify fractions and convert finite decimals exactly

Mode

First value

Operation

Second value

—

Reduced fraction—

Mixed number—

Decimal—

Percentage—

Об этом инструменте

An exact local fraction calculator using integer rational arithmetic instead of floating-point approximations.

Common uses

fraction calculatorfraction simplifierdecimal to fractionmixed number calculator

Как это работает

1Choose arithmetic or single-value simplify mode.
2Enter fractions, mixed numbers or finite decimals.
3Calculate to see the reduced fraction, mixed number and decimal result.

Часто задаваемые вопросы

What input formats are accepted?

Integers, fractions such as 3/4, mixed numbers such as 2 1/3, and finite decimals such as 0.125 are accepted.

Are decimal inputs converted exactly?

Finite decimal strings are converted from their digits to an exact rational value before calculation.

Is data uploaded?

No. The calculation runs locally in your browser.