Ratio calculator
Find d in a:b = c:d from a, b and c.
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USDTHE NUMBERS, MADE CLEARInstant calculation
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Use for resizing, recipes and proportional scaling. All of a, b and c must be positive; the ratio is not automatically reduced to integers.
Common uses
Find d in a:b = c:d from a, b and c.
BEHIND THE NUMBERSFormula & assumptions
a:b = c:d; d = b × c / a
Use for resizing, recipes and proportional scaling. All of a, b and c must be positive; the ratio is not automatically reduced to integers.