Percentage Calculator
Every percentage question in one place — percent of a number, ratios and change.
About the percentage calculator
A percentage calculator that answers the three questions people actually ask: what is X percent of a number, what percentage one number is of another, and the percentage increase or decrease between two values. Perfect for discounts, tips, tax, grades and statistics.
- Find X% of any number (discounts, VAT, commissions)
- Work out what percentage one value is of another
- Calculate percentage increase or decrease between two numbers
- Live results as you type — no submit button
- Handles decimals and large numbers cleanly
How do I calculate a percentage of a number?+
Select the 'percent of a number' mode, enter the percentage and the number, and the answer appears instantly — for example 15% of 200 is 30.
How do I work out a percentage increase or decrease?+
Use the 'percentage increase / decrease' mode and enter the starting value and the ending value. The calculator shows the percentage change, including whether it went up or down.
What percentage is one number of another?+
Switch to the 'X is what % of Y' mode, enter both numbers, and you'll see the ratio as a percentage — useful for scores, progress and proportions.