# PI

Formulas / PI
Calculate the value of Ï€.
`PI()`
• No parameters

## Examples

• `=PI()`

The PI() function in Sourcetable returns the mathematical constant pi (Ï€) to 15 decimal places. As an example, the formula above will return the result 3.14159265358979

• `=2*PI()*3`

The PI() function can be used in a formula to calculate the circumference of a circle. Using the formula above will return the circumference of a circle with a diameter of 3. The result in this case is 18.84955592153876

• `=PI()*A1^2`

The PI() function can be used to calculate the area of a circle when used in conjunction with other functions. For example, the formula will return the area of a circle with a radius of 3. The result in this case is 28.27433388230814

## Summary

The PI function is a mathematical constant that returns the value of Ï€, representing a half-turn in the radian angle system. It is used in many formulas relating to circles.

• The PI function calculates the value of Ï€ which is 3.14159265358979 accurate to 15 decimal places and represents a half turn in radians.
• The PI function appears in many formulas relating to circles.