Dashboard
← All tools
Calculators

Percentage Calculator

Find percentages, without the mental math.

  1. 01 · Choose input
  2. 02 · Configure
  3. 03 · Preview
  4. 04 · Download
Work in your browser

How to use Percentage Calculator

Enter a percentage and the number it applies to, then calculate.

Example

15% of 200 = 30. Formula: percentage × number ÷ 100.

Limits and output

Finite numbers, including decimals and negatives. Display rounds to at most eight decimal places.

Good to know

RatTools is an early version of an everyday utility workspace. Image, text, calculation, and developer inputs are processed in your browser.

Your favorites, recently used tool IDs, and theme choice are stored on this device. Tool inputs are not saved. Hosting can receive ordinary page requests; this app includes no analytics.

Images to PDF, merge and split work locally. PDF compression is upcoming. This early version is excluded from search indexing.

Icons: Solar by 480 Design · CC BY 4.0. Components: Be UI and shadcn/ui.