Math & Science
Popular
Proportion & Ratio Calculator
Solve proportions, simplify ratios, and calculate map scale distances.
Solve a/b = c/d. Enter any 3 values and leave the unknown as empty.
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Missing Value
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Verification
Simplify any ratio to its lowest terms and find equivalent ratios.
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Simplified Ratio
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As Fraction
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As Decimal
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First as %
Equivalent Ratios
Find real-world distance from a map measurement, or vice versa.
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Real Distance (same unit)
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Real Distance (km)