Decimal to fraction calculator

Convert a finite decimal into an exact reduced fraction by dividing its integer digits by a power of ten.

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Decimal number

Answer

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Convert a finite decimal into an exact reduced fraction by dividing its integer digits by a power of ten.

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Precision and calculation record

Decimal places in numeric results and text downloads

Rounding changes displayed numbers, not the calculation. Text, fractions, matrices and CSV schedules keep their own formatting. Automatic keeps up to 12 significant digits, with money shown to cents where applicable.

Saved scenario

Save the current answer, then change an input to compare. This clears when you leave.

Formula and assumptions

Only the digits you enter are converted; a rounded decimal such as 0.333 is exactly 333/1,000, not 1/3. Scientific e notation is supported within the input bounds.

Whole-number and finite-decimal arithmetic is exact within the stated input limits. Any requested rounding uses the selected setting. Thousands separators such as 1,000 are accepted; use a dot for decimals.

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Use +, −, ×, ÷, parentheses and %. A percentage is divided by 100. This does not change the main tool.

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Updated 2026-09-20

Using Decimal to fraction calculator

Convert a finite decimal into an exact reduced fraction by dividing its integer digits by a power of ten.

Only the digits you enter are converted; a rounded decimal such as 0.333 is exactly 333/1,000, not 1/3. Scientific e notation is supported within the input bounds.

Next: Fraction calculator

Next: Scientific notation calculator

A worked example

Example inputs: decimal number = 0.125. Reduced fraction = 1/8.

Before you use the result

Only the digits you enter are converted; a rounded decimal such as 0.333 is exactly 333/1,000, not 1/3. Scientific e notation is supported within the input bounds. Whole-number and finite-decimal arithmetic is exact within the stated input limits. Any requested rounding uses the selected setting.

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