Percentage Calculator
Easily solve percentage problems with our comprehensive calculator. Whether you need to find a percentage of a number, calculate percentage increase or decrease, or determine what percentage one number is of another, we've got you covered.
What is X% of Y?
Calculate a specific percentage of a number
X is what % of Y?
Find what percentage one number is of another
Percentage Change
Calculate increase or decrease between two numbers
What is X% of Y?
Result
Quick Percentage Calculations
Common percentage conversions at your fingertips
How to Calculate Percentages
What is X% of Y?
Formula: (X ÷ 100) × Y
Example: What is 20% of 150? (20 ÷ 100) × 150 = 30
X is what percentage of Y?
Formula: (X ÷ Y) × 100
Example: 30 is what % of 150? (30 ÷ 150) × 100 = 20%
Percentage change from X to Y
Formula: ((Y - X) ÷ X) × 100
Example: Percentage change from 150 to 180? ((180 - 150) ÷ 150) × 100 = 20%
This free, browser-based Percentage Calculator solves common percent problems: find X% of Y, compute X is what % of Y, and calculate percentage change. It shows the formula and a clear result, and everything runs locally for privacy.
- Pick a mode: What is X% of Y?, X is what % of Y?, or Percentage Change.
- Enter the numbers in the input fields; press Enter or click the action button.
- See the formula and result in the results card.
- Use the Quick Percentage tiles to autofill common values like 10%, 12.5%, 25%, etc.