Weather

Rain Days Calculator

Find rain days from total days and percent.

This result means that many days in the period are expected to be rainy days, out of the total days entered.

Formula

Rain days = total × percent ÷ 100.

How it works

For example, 30 days × 50% = 15 days.

FAQs

What does the Rain Days Calculator do?
It takes the values you enter and works out the rain days calculator for you, showing the result straight away.

What should I enter?
Enter ordinary numbers in the boxes above. If a value does not make sense for this calculation, the page will ask you to check it instead of showing a wrong answer.

Can I use the result for everyday math?
Yes. It is a general-purpose math helper; for professional work, still check the steps against your own working.