How do I calculate X% of a number?

Multiply the number by X and divide by 100. Example: 20% of 250 = 250 × 20 / 100 = 50.

How do I find what percent a number is of another?

Divide the part by the whole and multiply by 100. Example: 40 of 200 = 40 / 200 × 100 = 20%.

(New - Old) / Old × 100. A negative result means a decrease.

Calculators

Percentages appear everywhere - from discounts and taxes to statistics. This tool covers the three most common questions in one place.

20% of 250

Percentages appear everywhere - from discounts and taxes to statistics. This tool covers the three most common questions in one place.

Everything runs directly in your browser. No signup, no upload, no tracking of your inputs - just a fast, focused utility that respects your time.

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