How do I use the Ratio Calculator?
Enter your values in the fields and the result updates instantly as you type.
Ratio Calculator
Simplify or scale ratios. Enter your values, review the formula, and use the worked result as a quick check for everyday planning.
Ratio Calculator
Simplify or scale ratios.
Any positive integer
Any positive integer
Multiplier for scaling
Results
Simplified ratio
1:2
Scaled ratio
8:16
Formula: Ratio = a:b, Scaled = a*x:b*x
Ratio Calculator: Simplify and Scale Ratios
Simplify ratios to their lowest terms or scale them up and down. Ratios appear in cooking, mixing, design, finance, and any situation where proportions matter.
Formula
To simplify: divide both sides by their GCD. To scale: multiply both sides by the same factor. The calculator shows the simplified ratio and scaled versions.
Worked example
Ratio 12:18 simplifies to 2:3 (GCD = 6). Scaling 2:3 by 4 gives 8:12.
Practical guidance
Ratios in recipes and mixing
A paint mixture of 3:1 (paint to thinner) means 3 parts paint for every 1 part thinner. If you need 2 liters total, that is 1.5 L paint and 0.5 L thinner. Ratios keep proportions consistent regardless of total quantity.
Simplifying for comparison
Comparing 15:25 and 18:30 is hard until you simplify: both are 3:5. Simplification reveals equivalent ratios and makes decisions faster.
Frequently asked questions
What formula does this calculator use?
Ratio = a:b, Scaled = a*x:b*x
Can I use decimal values?
Yes. Decimal inputs are supported for most calculators. Integer-based tools use rounded integer values where appropriate.
Is this calculator free?
Yes. CalcuNimble calculators are free and optimized for fast everyday use.