Free Online Ratio & Proportion Calculator
Solve ratio proportions (A:B = C:D), simplify ratios, and scale dimensions proportionally.
:
=
:
Solved Ratio:
16 : 9 = 1920 : 1080
Client-Side Processing: All financial and personal inputs remain private in your browser.
Formula & Calculation Method
A / B = C / D => A * D = B * C
Solve for any missing variable in a proportion, simplify complex ratios to lowest terms, or scale recipe and design dimensions up or down.
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