Percentage Calculator
The three percentage questions you actually ask: what is X% of Y, X is what percent of Y, and the percentage change between two numbers. Type and read the answer.
Percentage of a number
What is% of? = 30
X is what percent of Y
is what % of? = 20%
Percentage increase / decrease
Fromto= +25%(increase)
Runs in your browser. Your input is not uploaded to PayloadIQ.
Three calculators, no formulas to remember
Each box answers one everyday question — a percent of a total, a part as a percentage of a whole, and the increase or decrease from one value to another. The change box also tells you the direction, so you don't misread a drop as a rise.
Instant and private
Results update as you type, with no button to press and no data leaving your device.
FAQ
How do I calculate the percentage of a number?
Use the first box: 'What is X% of Y'. For 15% of 200, enter 15 and 200 to get 30. The formula is Y × X ÷ 100.
How do I work out a percentage change?
Use the third box. From an old value to a new value, the change is (new − old) ÷ old × 100. From 80 to 100 is a +25% increase; from 100 to 80 is a −20% decrease.
Is my input saved or sent anywhere?
No. Every calculation runs locally in your browser as you type. Nothing is stored or uploaded.