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Ratio Calculator

Solve A : B = C : ? and simplify ratios.

Tool inputs stay in your browser · optional AI search sends your query

How to use it (step by step)

  1. 1Fill in the boxes: “A”, “B”, “C”. Example numbers are already there so you can see how it works; replace them with yours.
  2. 2The result updates instantly as you type (on a phone it is below the boxes).
  3. 3The bold line is the main answer. Tap Copy next to any value to copy it.

Words to know

Fraction / ratio
A fraction is a part of a whole (3/4 = three of four parts). A ratio compares two amounts (2:1 = twice as much).
Recipe scaling
Changing ingredient amounts to make more or fewer servings while keeping the same taste.

More in Math

Fraction CalculatorAdd, subtract, multiply and divide fractions, simplified.GCF & LCM CalculatorGreatest common factor and least common multiple of a list.Prime Number CheckerIs it prime? Plus prime factorization and the next prime.Quadratic Equation SolverSolve ax² + bx + c = 0, including complex roots.Random Number GeneratorRandom numbers in any range, with or without repeats.Scientific CalculatorCalculate expressions with powers, roots, logarithms and trigonometry.