Percentage calculator
Share, proportion, change, discount
This percentage calculator gathers the five everyday cases: what is X% of Y, what percentage a part represents in a total, the percentage change from a value A to a value B (increase or decrease), applying a discount (with the final price and the amount saved) and adding a percentage to an amount. Handy for sales, a tip, a raise, a grade or a statistic.
Every calculation runs in your browser: no data sent, no tracking, no ads.
FAQ
Which kinds of calculations are available?
X% of Y, a part of a total in %, the change A→B, a discount and adding a percentage.
How is a percentage change computed?
With the formula (B − A) ⁄ A × 100; a positive result is an increase, negative a decrease.
What happens if the total is zero?
An error message indicates that division by zero is impossible.
Are my values stored?
No, everything is computed locally and nothing is kept or sent.