Evaluate arithmetic with parentheses, powers, Math functions and PI or E, without eval
Percentage Calculator
Runs locally
Use Percentage Calculator
What it does
Pick one of three modes and type two numbers: X% of Y, X as a percentage of Y, or the percentage change between an old and a new value.
It runs entirely in your browser: nothing you enter is uploaded.
Example
15% of 240
X% of Y mode: X = 15, Y = 24036.0000Result 36.0000.
FAQ
How is percentage change calculated?
(new − old) ÷ |old| × 100, so going from 80 to 100 is 25% and from 100 to 80 is −20%. The old value must not be 0.
Why do I see — instead of a result?
A number is missing or is zero where the formula cannot use it: X% of Y needs both numbers non-zero, X is ?% of Y needs a non-zero Y, and % Change needs a non-zero old value. Results are rounded to 4 decimal places.
Is anything sent?
No. It is arithmetic in your browser.