## Summary

To calculate the volume of a cylinder, you can use the PI function together with the exponent operator (^). In the example shown, the formula in D5, copied down, is:

``````=PI()*B5^2*C5
``````

which returns the volume of a cylinder with the radius given in column B and the height given in column C. Units are indicated generically with "u", and the resulting volume is units cubed (u3).

## Generic formula

``=PI()*r^2*h``

## Explanation

In geometry, the formula for calculating the volume of a cylinder is:

The Greek letter π ("pi") represents the ratio of the circumference of a circle to its diameter. In Excel, π is represented in a formula with the PI function, which returns the number 3.14159265358979, accurate to 15 digits:

``````=PI() // returns 3.14159265358979
``````

To square a number in Excel, you can use the exponentiation operator (^):

``````=A1^2
``````

Or, you can use the POWER function:

``````=POWER(A1,2)
``````

Rewriting the formula for volume of a cylinder with Excel's math operators, we get:

``````=PI()*B5^2*C5
``````

Or, with the POWER function:

``````=PI()*POWER(B5,2)*C5
``````

The result is the same for both formulas. Following Excel's order of operations, exponentiation will occur before multiplication.

Author

### Dave Bruns

Hi - I'm Dave Bruns, and I run Exceljet with my wife, Lisa. Our goal is to help you work faster in Excel. We create short videos, and clear examples of formulas, functions, pivot tables, conditional formatting, and charts.