Percentage Calculator
Percentage Calculator
Three quick percentage tools in one: find a percentage, work out what percent one number is of another, and calculate percent change.
How to Use the Percentage Calculator
Each box solves a common percentage question. Type your numbers and the answer appears instantly. Use the first for discounts and tips, the second to turn a part into a percentage, and the third to measure growth or decline.
Everyday Percentage Problems
From sale prices and tips to test scores and price changes, percentages come up constantly. Having the three most common calculations side by side means you never have to remember the formula.
Frequently Asked Questions
How do I calculate a discount?
Use the first box: enter the discount percentage and the original price to see the amount off.
How is percentage change calculated?
It is the difference between the new and old value, divided by the old value, shown as a percentage with a plus or minus sign.
Does it handle negative numbers?
Yes, the percent change calculation works with increases and decreases.