# Documentation/Calc Functions/PI

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## Function name:

PI

## Category:

Mathematical

## Summary:

Returns the approximate value of the mathematical constant π, rounded to 14 decimal places.

## Syntax:

PI()

## Returns:

3.14159265358979, which is the approximate value of π in radians, rounded to 14 decimal places.

## Arguments:

None.

## Additional details:

- π is an irrational number, which can be defined as the ratio of a circle's circumference to its diameter.
- If angle in degrees is multiplied by PI()/180, its corresponding radian value is obtained.

## Examples:

Formula | Description | Returns |
---|---|---|

=PI() | function returns value of π with precision upto 14 decimal places | 3.14159265358979 (radians) |

=4*4*PI() | the area in cm^{2} of a circle of radius 4 cm where area of circle is given by π*(radius)^{2} |
50.2654824574367 (radians) |

## Related LibreOffice functions:

## ODF standard:

## Equivalent Excel functions:

PI