Free Ratio Calculator
Enter two numbers to get the ratio simplified to lowest terms — plus each share as a percentage of the total, and optionally the ratio scaled by any factor.
How to Use the Ratio Calculator
- Enter the two ratio values.
- Optionally enter a scale factor.
- Click Simplify Ratio for the lowest-terms ratio.
Features
Reduces via the greatest common divisor (handling decimals by scaling), computes percentage shares, and multiplies both terms by your scale factor for recipes, models and mixes.
Benefits & Use Cases
Chefs scale recipes, students simplify math homework, gamers compare stats, and DIYers mix paint, concrete or fertilizer ratios.
Tips
Ratios compare parts to parts; if you need part-to-whole, the percentage shares in the result are what you want.
Frequently Asked Questions
How do you simplify a ratio?
Divide both numbers by their greatest common divisor, e.g. 12:18 becomes 2:3.
What is the difference between ratio and fraction?
A ratio 2:3 compares two parts; as a fraction of the total, the first part is 2/5.
Can ratios use decimals?
Yes — the tool scales decimals to whole numbers before simplifying.
How does scaling work?
Multiply both terms by the factor: 2:3 scaled by 4 becomes 8:12 — same relationship, bigger batch.
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