Calculate percentages, percentage change, and more with our easy-to-use tool
Calculate X% of Y - perfect for calculating tips, commissions, and discounts
Find how much a value increases by a certain percentage
Calculate how much a value decreases by a certain percentage
A percentage is a way to express a number as a fraction of 100. It is denoted using the percent sign (%). Percentages are used widely in everyday life - from calculating discounts during shopping to understanding interest rates on loans.
X% of Y = (X/100) × Y
Example: 20% of 100 = (20/100) × 100 = 20
Increase = Original Value × (1 + Percentage/100)
Example: Increase 100 by 20% = 100 × (1 + 20/100) = 120
Decrease = Original Value × (1 - Percentage/100)
Example: Decrease 100 by 20% = 100 × (1 - 20/100) = 80
Our calculator makes percentage calculations simple:
Get accurate percentage calculations in seconds without manual math
All calculations happen in your browser - no data is sent to servers
Understand percentage relationships through clear visual charts