⚡
Ratio Calculator
Simplify ratios, solve for missing values, and scale ratios up or down.
:
:=:
:
How to Use the Ratio Calculator
- Choose a mode: Simplify, Solve, or Scale.
- Enter the ratio values in the provided fields.
- For Solve mode, leave exactly one field blank.
- Click Calculate to see the result.
Formula & Method
Simplification: Divide both terms by their GCD.A:B = (A/GCD) : (B/GCD)
Solving proportions: A/B = C/D — cross-multiply to find the missing value.
Scaling: Multiply both terms by the scale factor.
Examples
| Operation | Input | Result |
|---|---|---|
| Simplify | 12 : 18 | 2 : 3 |
| Solve | 2:5 = 6:? | 15 |
| Scale | 3:4 × 2 | 6 : 8 |
Frequently Asked Questions
What is a ratio?
A ratio compares two quantities by division.
How do I simplify a ratio?
Divide both numbers by their greatest common divisor (GCD).
Can ratios have decimal values?
Yes, but simplified ratios are typically expressed as whole numbers.
People Also Ask
How accurate is this calculator?
Our calculators use standard mathematical formulas and provide accurate results.
Can I use this on my phone?
Yes, all tools are fully responsive and work on any device.