Category: Calculators
Percentage Calculator
Percent of a number, share of a total and change
Work out what X% of Y is, what share one number is of another, and the percentage increase or decrease between two values.
Result30
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What this tool does
Three everyday questions in one place: how much a percentage of an amount is, what proportion one figure represents, and how much something has grown or fallen. Useful for discounts, tips, tax, margins and reporting.
How to use it
- Pick the calculation you need at the top.
- Enter the two numbers; the labels change to match the mode.
- Read the result underneath.
Privacy
This tool runs entirely in your browser. Your input is never uploaded, stored or shared — closing the tab removes it.
Frequently asked questions
- How is percentage change calculated?
- The difference between the two values divided by the absolute starting value, multiplied by 100. A negative result means a decrease.
- Can I use decimals?
- Yes. Decimal separators from your keyboard are accepted, and results are rounded for readability.