Free online tool
Ratio calculator
Find the missing value in A : B = C : D, for scaling recipes, maps, images and more. Or simplify a ratio.
Works in your browserNothing is sent anywhereNo sign-upFree
:=:
Leave one box empty; it is worked out for you.
Simplify:
Simplest form · as 1 : x · as x : 1–
Questions
Good to know
How do I scale a recipe?
Put the old amount and servings in A and B, the new servings in D, and leave C empty. Example: 200 g : 4 people = ? : 6 people gives 300 g.
What is 1920 × 1080 as a ratio?
16 : 9, the usual widescreen shape.
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