Percentage Calculator
Calculate percentages and percentage changes.
How to Use
- Choose a calculation mode: "X% of Y" (e.g. what is 15% of 200), "% Change" (percentage change between two numbers), or "X is ?% of Y" (what percentage is X of Y).
- Fill in the two required numbers — the result is calculated instantly.
- Copy the result for your records.
Frequently Asked Questions
- Is the calculation accurate?
- Yes, Percentage Calculator uses standard math. For critical calculations, verify independently.
- What's the difference between the three calculation modes?
- "X% of Y" multiplies Y by the percentage (e.g. 15% of 200 = 30). "% Change" calculates (new - old) / old × 100 — showing how much a value grew or shrank. "X is ?% of Y" divides X by Y and multiplies by 100 — finding what fraction X is of Y.
- Can I use this for financial calculations?
- For critical financial calculations, use specialized software with rounding guarantees.