BurnerTools
%
Percentage Calculator
Every kind of % calculation, instantly.
Every common percentage calculation in one place: percent of a number, percent change between two values, and reverse percentage. No ads, no popups, no math homework.
- Category
- Math & Everyday
- Privacy
- Runs in your browser
- Uploads
- No server upload
- Access
- Free, no signup
What is X% of Y?
%of
30
100% Private. Processed locally on your device. Your data never touches a server.
X is what % of Y?
of=
20%
100% Private. Processed locally on your device. Your data never touches a server.
% change from A to B
→=
25%
100% Private. Processed locally on your device. Your data never touches a server.
How to use
- 1Pick the calculation type you need.
- 2Fill in the two known values.
- 3Read the result — copy it if you need it.
Popular use cases
- →Calculate sale discounts (`30% off $79.99`).
- →Work out tip percentages on a restaurant bill.
- →Track week-over-week growth in a metric.
Frequently asked questions
How do I calculate percentage change?+
((new − old) / old) × 100. Positive = increase, negative = decrease.