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Ratio Calculator
Simplify ratios to lowest terms and solve proportions with a single unknown.
Simplified ratio
2 : 3
Decimal form: 0.6667
Two Tools in One
Simplify any ratio to its lowest terms using the GCD, or solve a proportion with one unknown (X:Y = A:?). Handles decimals, integers, and multi-term ratios like 3:5:7.
Real-World Uses
- Recipe scaling (butter:flour:sugar)
- Mixing paints, cement, fertilizer
- Aspect ratios (photo, video, screen)
- Financial ratios and team allocations
Frequently Asked Questions
How do I simplify a ratio?
Find the greatest common divisor (GCD) of both numbers and divide each side. 24:36 → GCD 12 → 2:3. We do it automatically for any number of terms.
How do I solve a proportion?
Cross-multiply. If 3:4 = 9:?, then ? = (4 × 9) / 3 = 12. Enter three values and the tool solves for the fourth.
What about ratios with decimals?
Multiply each side by 10 or 100 until they're whole, then simplify. 1.5:2.5 → 15:25 → 3:5. Our tool handles decimals directly.
Can I simplify 3-term ratios?
Yes. 12:18:24 simplifies to 2:3:4 using the GCD of all three values. The calculator supports any number of terms.