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Ratio calculator

Simplify a ratio of two, three or more parts, decimals included, and see each part's share of the whole. Free, with no account or uploads.

Simplify a ratio

Type the ratio with colons, such as 12 : 18 or 1.5 : 2.25 : 3. It is brought to its smallest whole numbers.

12 : 18 simplified

2 : 3

1 : 1.5 with the first as 1

  • Part 1: 2 of every 5, which is 2/5 or 40% of the whole
  • Part 2: 3 of every 5, which is 3/5 or 60% of the whole

How it is worked out

  1. Divide every part by 6, the largest number that goes into all of them.2 \mathbin{:} 3
How it works and help
Every fraction is kept exact, step by step, on your device. Nothing you type is sent anywhere.

A little help along the way

Follow these steps. Everything is worked out exactly in your browser; nothing is sent anywhere.

  1. Say what you want to doWork with fractions is the usual. The others simplify a ratio, find x or share out a total, turn decimals and fractions into each other, and work with picture sizes.
  2. Type the numbersFractions as 3/4, mixed numbers as 1 1/2, ratios with colons as 12 : 18, and repeating decimals with brackets as 0.1(6).
  3. Read the answer and every stepThe answer is drawn as a textbook would, with each step under it.

Questions people ask

How do I simplify a ratio?
Divide every part by the largest number that goes into all of them. 12 : 18 is 2 : 3, since 6 goes into both.
Can it simplify a ratio with decimals?
Yes. It first multiplies every part by the smallest number that clears the decimals, then divides: 1.5 : 2.25 : 3 times 4 is 6 : 9 : 12, and dividing by 3 gives 2 : 3 : 4.
Can it turn a ratio into percentages?
Yes: under the answer, each part is given as its share of the whole, as a fraction and as a percentage. 2 : 3 is 40% and 60%.

This page is the Fraction and ratio calculator, opened for this one job; every other tool it has is one press away. Each of its settings is explained on the Fraction and ratio calculator's own page.

Read the step-by-step guide

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