Calculate a portion
Find the number represented by a specified percentage of a total value.
Percentage Calculator
Percentage Calculator
Calculate a percentage of a value, a ratio, or percent change with explicit formulas.
Key features
- Offers X% of Y, ratio, and percent-change modes.
- Shows the exact formula used for each result.
- Distinguishes an increase, decrease, and no change.
- Calculates immediately in your browser.
How to use
- Choose a calculation mode.
- Enter the two values.
- Review the formula and result.
Examples
Check ratio or change
Calculate one value's percentage of another or its change from an earlier value.
Privacy
Percentage inputs never leave your browser.
Requirements
Ratios and percent changes cannot divide by zero. All values must be finite numbers.
Common questions
- Which percentage calculations are supported?
- It calculates X percent of a value, one value as a percentage of another, and percentage change from an old value to a new value.
- Can ratio or change be calculated from a zero base?
- No. A ratio or percentage change with zero as the divisor is undefined and is shown as an error.
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