Percentage Calculator

Solve the four most common percentage calculations: what X% of Y is, what percentage X is of Y, and percentage increase, decrease or difference.

X (percentage)

Y (number)

20% of 150

How to use the Percentage Calculator

Choose the type of percentage calculation you need from the tabs.

Enter your two numbers.

The result updates instantly as you type.

Percentage Formulas

X% of Y = (X ÷ 100) × Y | X is what % of Y = (X ÷ Y) × 100 | % change = ((New − Old) ÷ Old) × 100

Example

1.What is 20% of 150? → (20 ÷ 100) × 150 = 30
2.40 is what percent of 200? → (40 ÷ 200) × 100 = 20%
3.Price rises from 50 to 65 → % increase = (65 − 50) ÷ 50 × 100 = 30%

Frequently Asked Questions

What's the difference between percentage change and percentage difference?+

Percentage change compares a new value to an old value and is direction-aware (increase or decrease). Percentage difference compares two values without treating either as the 'original', and is always positive.

Can I calculate a percentage of a negative number?+

Yes, the calculator supports negative numbers and will show a negative result where mathematically correct.

Discount Calculator Markup Calculator Profit Margin Calculator