What is X% of Y?
What is % of ?
30
X is what percent of Y?
is what % of ?
15%
Percentage change
From to
+25%
Increase / decrease by %
%
220
Tip calculator
Bill tip % split
Total 94.40
Percentage difference
Between and
40%
Every percentage calculation in one place
Whether you need a discount, a tip, a grade, a tax amount or a growth rate, these six calculators cover the common percentage questions. Each one updates as you type.
- X% of Y — find a portion, e.g. 15% of 200.
- X is what % of Y — turn a fraction into a percentage.
- Percentage change — increase or decrease from an old value to a new one.
- Increase / decrease by % — add or remove a percentage, e.g. a 10% raise or a 20% sale.
- Tip — add a tip and split the bill.
- Percentage difference — compare two values relative to their average.
Frequently asked questions
How do I calculate a percentage of a number?
Use the first box: enter the percentage and the number, e.g. 15% of 200 = 30. The formula is (percentage ÷ 100) × number.
How do I work out percentage increase or decrease?
Use “Percentage change” for the difference between an old and new value, or “Increase / decrease by %” to apply a percentage to a starting amount.
Can it calculate a tip and split the bill?
Yes. Enter the bill, the tip percentage and how many people are splitting it to see the total, the tip amount and the amount each person pays.