Percentage Calculator
Calculate percentages instantly: what is X% of Y, X is what % of Y, percentage change. Free, no sign-up.
How to Use
1
Choose a mode
Select what you want to calculate: percentage of, is what percent, or percentage change.
2
Enter values
Type your numbers in the input fields.
3
Get instant results
Results update in real-time as you type, with formula and explanation.
Features
Three Calculation Modes
What is X% of Y, X is what % of Y, and percentage change between two values.
Instant Results
No submit button needed — results update as you type.
Formula Display
See the exact formula used for each calculation.
Copy Results
One-click copy any result to your clipboard.
Frequently Asked Questions
Calculator guides
Recommended Reading
Practical guides matched to this calculator, its inputs, and the result users need to trust.
10 guides