CALCULATOR
Percentage Calculator
Three common percentage questions, one focused calculator.
Result
Enter two numbersQUICK ANSWER
How it works
Choose a calculation, enter two numbers, then select Calculate. The result and exact formula appear together.
- X% of Y: (X ÷ 100) × Y
- X as % of Y: (X ÷ Y) × 100
- % change: ((new − original) ÷ |original|) × 100
Privacy: Browser-only calculation. Input values are not sent to a server.
Verified: 2026-10-01 · Formula 1.0.0 · Source: Local arithmetic
FAQ
Frequently asked questions
How do I calculate a percentage of a number?
Divide the percentage by 100, then multiply by the number. For example, 20% of 500 is 100.
How do I find what percent one number is of another?
Divide the part by the total and multiply by 100. The total cannot be zero.
How is percentage change calculated?
Subtract the original value from the new value, divide by the absolute original value, then multiply by 100.
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