Percentage Calculator
Choose what you want to work out, enter your numbers, and get an instant, accurate percentage result.
What this calculator does
This tool covers the three most common percentage questions people run into: finding a percentage of a number, figuring out what percent one number is of another, and calculating the percent increase or decrease between two values.
The formulas used
X% of Y is calculated as (X ÷ 100) × Y. X is what percent of Y is calculated as (X ÷ Y) × 100. Percent change from X to Y is calculated as ((Y − X) ÷ |X|) × 100, where a positive result is an increase and a negative result is a decrease.
A quick note
These are standard arithmetic formulas used across finance, retail, and everyday math. This calculator is provided for general educational and planning purposes and is not a substitute for professional financial or accounting advice.