Math
Ratio Calculator
Calculate ratios, simplify them to lowest terms, or find a missing value when scaling a ratio.
Scaled Part A
β
How It Works
To scale a ratio, multiply both parts by the same scale factor. If A:B = 3:4 and scale = 5, then scaled A = 15 and scaled B = 20. The ratio 3:4 is maintained.
Example
Recipe ratio 3:4 (flour to sugar) scaled by 5 = 15 cups flour : 20 cups sugar. The proportion is identical.
Frequently Asked Questions
How do I simplify a ratio?
Find the greatest common divisor (GCD) of both numbers and divide each by it. 12:8 β GCD is 4 β simplified to 3:2.
What is a proportion?
A proportion states that two ratios are equal: A/B = C/D. If three values are known, you can solve for the fourth by cross-multiplying.
What are ratios used for?
Cooking, map scales, currency exchange, gear ratios, mixing solutions, financial analysis (P/E ratio), and many engineering applications.