Convert a decimal to its simplest fraction (with a whole-number part) or a fraction back to a decimal.
Numbers • fractions
Built on internationally recognised SI and standards-body conversion factors for dependable results.
Results update live as you type, with a clear visual breakdown across every unit at once.
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Converting a decimal to a fraction expresses it as a ratio in lowest terms — 0.375 becomes 3/8. This is constant in cooking, woodworking, construction, math homework and finance, where a fraction is often clearer than a long decimal.
This tool finds the simplest fraction for any decimal (with a whole-number part for values over 1) and converts fractions like 1 1/2 back to decimals. Repeating decimals are approximated very closely. Instant and private.