โ Math
Ratio Calculator
A ratio compares two quantities and stays the same when both sides are multiplied or divided by the same number. Simplifying to the smallest whole numbers makes ratios much easier to compare.
How it works
First value
Second value
Scale second part to
Scaled first value
First divided by second
First as share of total
Frequently asked questions
How do I use the Ratio Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.