About Ratio Calculator
Solve proportions and missing terms in ratios: A : B = C : D.. Designed for accurate, instantaneous calculations with zero wait time.
Formula
A / B = C / D ⟹ D = (B × C) / A
Example Calculation
If 4 : 8 = 12 : D, then D = (8 * 12) / 4 = 24.
How to Use
- Enter your values into the form fields above.
- The calculation updates immediately in real time.
- Inspect the main summary and secondary breakdowns below.