Ratio Calculator
Simplify ratios, convert them to fractions or percentages, or solve a missing value in a proportion in just a few clicks.
Why Work with Ratios?
Ratios help you compare two quantities quickly. Whether you’re scaling a recipe from 3:4 parts, adjusting design aspect ratios, or telling a client how budget splits break down, simplified ratios prevent mistakes.
Where You’ll Use This Calculator
- Cooking and formulation: Scale ingredients proportionally for any serving size.
- Business and finance: Present spend allocation (for example 30% paid ads / 70% organic).
- Design and engineering: Maintain consistent width to height ratios across devices.
- Education: Teach students how to solve proportions without manual cross-multiplying.
Example Proportions
Original ratio 2:3 = flour:sugar. Want 10 cups flour? The calculator finds sugar = 15 cups.
16:9 screen fits 1920 px width. Unknown height? Get 1080 px instantly.
1:250 scale drawing: enter 1 cm on the drawing to find 250 cm real-world distance.
Frequently Asked Questions
Divide both sides by their greatest common divisor. The calculator handles this automatically using the classic GCD method.
Yes. In that case you will simply get the simplified ratio and conversions. Enter one value to solve for the missing partner.
Absolutely. A:B is not the same as B:A, so always line up your quantities consistently when inputting ratios.