Ratio Calculator

A ratio calculator that reduces a ratio to its lowest terms, finds the missing term in a proportion, and splits an amount into shares. Enter two or three terms to simplify, three terms of a proportion to solve for the fourth, or an amount with a ratio such as 3:2:1 to divide it up. Results show the reduced form, the ratio scaled so the smallest term is 1, and each term's share of the total as a percentage. Decimal terms are scaled to whole numbers before reducing, so values are kept to four decimal places.

Calculator Type
Leave blank for a two-term ratio.
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The tool solves for the fourth term.
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Two to ten terms separated by colons, commas or spaces.
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