Calculator modes
1) What is X% of Y? 2) X is what % of Y? 3) Percentage increase from X to Y. 4) Percentage decrease. 5) Add/subtract a percentage from a value.
Converter and calculator
Percentage Calculator
Calculate percentages instantly: what is X% of Y, what percentage is X of Y, percentage increase/decrease, and more.
Complete guide
How to use Percentage Calculator
Unit converters guide for percentage calculator users.
Percentage calculations are needed constantly — tip calculations, discount pricing, grade calculations, tax, interest, and growth rates. This tool handles the four most common types: finding a percentage of a number, finding what percentage one number is of another, percentage increase, and percentage decrease.
How to use it
Select the calculation type. Enter the values. The result updates instantly.
Common examples
20% tip on $45 = $9. 15% off $80 = $68. Score 72/90 = 80%. Growth from 100 to 125 = 25% increase.
Quick checklist
- For discounts: 'What is X% of Y' gives the discount amount. Subtract from original for the sale price.
- For tips: find X% of the bill total.
- For grade: 'X is what % of Y' — score is X, total possible is Y.
- For growth: use percentage increase mode with old value and new value.
Answers
Percentage Calculator FAQs
What is 15% of 200?
200 × 0.15 = 30.
What percentage is 45 of 60?
(45 ÷ 60) × 100 = 75%.
What is a 20% increase on 150?
150 × 1.20 = 180.
How do I calculate a 30% discount?
Multiply the original price by 0.30 to get the discount amount. Subtract from original: 100 × 0.30 = 30 off, so 70 is the sale price.