Ratio Calculator
Simplify ratios, compare proportions, and scale ratios up or down. Solve ratio problems instantly.
Ratio Results
Original Ratio: -
Simplified Ratio: -
Decimal Form: -
Percentage (First Value): -%
How to use the Ratio Calculator
- Enter Value 1 and Value 2.
- Optionally enter a scale factor.
- The simplified ratio, scaled ratio, decimal and percentage split appear instantly.
Formula used
Worked example
Ratio 24 : 36
GCD of 24 and 36 = 12
Simplified ratio = 2 : 3
Decimal = 0.6667; A's share = 40%
Scaled by 5: 10 : 15
Using ratios to share amounts
To divide ₹10,000 in the ratio 2 : 3, add the parts (5), find one part (₹2,000), and multiply: ₹4,000 and ₹6,000. The same method works for partnership profit, cement-sand mixes (1 : 4), recipe scaling and map scales. Screen sizes such as 16 : 9 and 4 : 3 are aspect ratios.
Tips for accurate results
- Ratios have no units, but both values must be in the same unit.
- Order matters: 2 : 3 is not 3 : 2.
- For decimals, multiply both sides by 10 or 100 first.
Frequently Asked Questions
Divide both numbers by their greatest common divisor.
Divide by the total parts, then multiply by each part.
A : B relates to the fraction A/B, but ratios can compare more than two quantities.
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Content reviewed by Vinod, Easy Smart Calculator · Last updated October 2026
How to Use
Enter two values to calculate their ratio. The calculator will simplify the ratio to its lowest terms and show it in multiple formats.
What is a Ratio?
A ratio: A comparison of two quantities. For example, 12:8 means "12 to 8" or "for every 12 of one thing, there are 8 of another."
Simplified Ratio: The lowest form where both numbers have no common factors. 12:8 simplifies to 3:2.
Scaled Ratio: Multiply both parts by the same number. 3:2 scaled by 2 becomes 6:4.
Real-World Examples
- Recipe Scaling: If a recipe calls for 3:2 flour to sugar, you can scale it for different batch sizes
- Map Ratios: A map scale of 1:50,000 means 1 cm on the map = 50,000 cm in reality
- Aspect Ratios: A 16:9 screen ratio is a comparison of width to height
- Financial Ratios: P/E ratio compares price to earnings