benri-ni
Language: English

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Percentage calculator

Calculates “B% of A”, “A as a percentage of B” and the percentage change from A to B.

Calculation
%

Use “.” as the decimal point and “,” as the thousands separator (e.g. 1,234.5). Separators are optional.

Result

Enter A and B to see the result here.

Only the calculation type and decimal places are saved on this device (the numbers you enter are not saved).

How it calculates

Calculation Formula
B% of A A × B ÷ 100
A is what % of B A ÷ B × 100
Change from A to B (B − A) ÷ |A| × 100
  • You can enter up to 15 digits before and 10 digits after the decimal point. Use “.” as the decimal point and “,” as the thousands separator (only in groups of three).
  • Calculations use decimal arithmetic, so results such as 3% of 0.1 have no binary rounding errors. Divisions that don’t come out even are calculated to 20 decimal places.
  • Results are rounded to the selected number of decimal places, with halves rounded away from zero. “Automatic” rounds to 10 decimal places and drops trailing zeros.
  • If the whole (B) or the original value (A) is 0, the calculation would divide by 0, so no result is shown.
  • If the original value is negative, the percentage change is calculated using its absolute value.

Saving and sharing

  • Only the calculation type and number of decimal places are saved on this device. The numbers you enter and your calculation history are not saved.
  • A link containing the calculation type, the numbers and the decimal places is created only when you press “Create a share link”. Anyone who receives the link can see the numbers. The values in the link mean the same in every language.

This tool processes your input and files on this device (in your browser) and does not send them to a server. See Privacy and ads for details.

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