What is ?% of ??
Multiply the number by the percentage. Handy for tips, taxes, and commissions.
Result
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Enter two numbers to see the result.
Usage Steps
- 1 Pick the calculation you need: percent of a number, share, percentage change, or add/subtract.
- 2 Enter the two values — the result updates instantly as you type.
- 3 Copy the result, or reset the fields to start another calculation.
Features
Four calculators in one: percent of, share, change, and add/subtract
Live results as you type — no submit button
Runs entirely in your browser — nothing is uploaded
Handles decimals, thousands separators, and negative values
FAQ
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100. For example, 15% of 200 is 200 × 15 ÷ 100 = 30.
How do I work out a percentage increase or decrease?
Subtract the original value from the new value, divide by the original value, then multiply by 100. Going from 100 to 150 is a 50% increase.
Is my data sent anywhere?
No. Every calculation runs locally in your browser, so the numbers you enter never leave your device.