Ratio calculator
Solve A : B = C : x, and simplify a ratio.
How this calculator works
x = B × C ÷ A. Ratios are simplified by dividing both sides by their greatest common factor.
Worked example: 3 : 4 = 12 : x gives x = 4 × 12 ÷ 3 = 16. Use it to scale a mix, such as 1 part cement to 4 parts sand, or a map scale.
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