Percentage Calculator
Calculate percentages, percent changes, and ratios.
100% Free Forever
What is X% of Y?
% of =50
X is what % of Y?
is what % of =66.6667%
Percent change from X to Y
From to =25%
Free Percentage Calculator
Calculate percentages, percent changes, and ratios. Find what X% of a number is, or what percent X is of Y.
How to use this tool
- 1
Pick a calculation type
Percent of, percent change, etc.
- 2
Enter the numbers
Fill in the relevant fields.
- 3
See the result
Get the percentage instantly.
Pro tips
- Percent change can be negative (a decrease).
Frequently asked questions
How is percent change calculated?
((new − old) / old) × 100.