Percentage Calculator
Three ways to calculate percentages — pick the one that fits your question.
What is X% of Y?
How to Use
- Select the type of percentage calculation you need using the tabs above.
- Enter your numbers in the fields provided.
- Click Calculate to see the result instantly.
Percentage Formulas
- What is X% of Y? — Result = (X ÷ 100) × Y
- X is what % of Y? — Result = (X ÷ Y) × 100
- Percentage change: — Result = ((Y − X) ÷ X) × 100
Frequently Asked Questions
What is 20% of 150? ▼
20% of 150 is 30. You calculate this as (20 ÷ 100) × 150 = 30.
How do I calculate a percentage increase? ▼
Use the percentage change tab. Enter the original number and the new number. The formula is ((New − Original) ÷ Original) × 100. A positive result is an increase, a negative result is a decrease.
What is 15% tip on $85? ▼
15% of $85 is $12.75. Enter 15 in the percentage field and 85 in the number field using the first tab.
How do I find what percentage one number is of another? ▼
Use the second tab 'X is what % of Y'. For example, 45 is 22.5% of 200. The formula is (45 ÷ 200) × 100 = 22.5%.
Is this percentage calculator free? ▼
Yes, completely free. No sign up, no download, works in any browser on any device.
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