Percentage Calculator
Three common percentage problems on one page — no spreadsheet needed.
X is what % of Y?
Result: 12.5%
What is X% of Y?
Result: 12
% increase / decrease between X and Y
Result: 25% increase
What is this tool?
Percentage calculations show up in discounts, grades, analytics, and finance. This page combines the three most common variants: finding what percent one number is of another, taking a percent of a value, and measuring percent increase or decrease between two values.
How to use it
- Pick the sub-calculator that matches your question.
- Enter the numbers in the labeled fields.
- Copy the result when you need it elsewhere.