How to use Ratio Calculator
- Choose to simplify a ratio or to split a total.
- Enter parts A and B (and C if you have three parts).
- For a split, also enter the total.
- Read the result.
About this tool
To simplify a ratio, divide every part by their greatest common divisor: 12:18 becomes 2:3. Decimals are scaled to whole numbers first, so 1.5:4.5 becomes 1:3.
To split a total, add the parts together and give each person their part divided by the sum, times the total. For example 500 split 2:3 gives 200 and 300.
Privacy: This tool runs in your browser. What you type or choose is not sent to a server by this website.
Common questions
Can a ratio contain 0?
Yes, such as 0:5, which simplifies to 0:1. At least one part must be greater than 0.
What is the difference between a ratio and a proportion?
A ratio compares quantities. A proportion says two ratios are equal. Use the Proportion Calculator to find a missing value.