Ratio Calculator
Simplify ratios to their lowest terms and solve ratio proportions. Enter two or three values to calculate.
ArithmeticFree · no sign-upStep-by-step answers
How to use this calculator
- 1Enter your values or expression in the fields above.
- 2Press Enter or click the calculate button.
- 3Read the result, then follow the numbered step-by-step working to understand each stage.
Worked Examples
Frequently Asked Questions
How do you simplify a ratio?
Divide both parts by their greatest common divisor (GCD).
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Learn the concepts
Understand the theory behind this calculator.
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Ratios
A ratio compares two or more quantities. Ratios can be written as a:b, a/b, or "a to b".
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Fractions
A fraction represents a part of a whole. It consists of a numerator (top) and denominator (bottom). Understanding fractions is foundational for all higher mathematics.
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Decimals
Decimals are another way to represent fractions, using place values based on powers of 10.
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Percentages
A percentage expresses a number as a fraction of 100. It is used everywhere in daily life — discounts, interest, statistics.