## What is Pi?

The number π is a mathematical constant that is the ratio of a circle’s circumference to its diameter. Calculated to the 5th decimal it is approximately equal to 3.14159

## Calculate Pi

**How many digits of Pi** would you like to see? With this great little calculator powered by Wolfram, you can specify the number of digits, and the calculator will show you Pi to that degree. Very cool math tool to work on memorizing Pi to a particular digit.

## Pi Calculator

### Citation styles

- APA style
- Pi Calculator. (2014, February 23). In
*ClassBrain Math Tutorials*. Retrieved 09:47, September 22, 2017, from http://www.classbrainmath.com/pi-calculator/ - MLA style
- Cynthia Kirkeby, “Pi Calculator.”
*ClassBrain Math Tutorials*. 23 February 2014, 20:59 UTC. . 22 Sep 2017 <http://www.classbrainmath.com/pi-calculator/>. - MHRA style
- Cynthia Kirkeby, 'Pi Calculator',
*ClassBrain Math Tutorials*, 23 February 2014, 20:59 UTC, <http://www.classbrainmath.com/pi-calculator/> [accessed 22 September 2017] - The Chicago Manual of Style
- Cynthia Kirkeby, “Pi Calculator.”
*ClassBrain Math Tutorials*, http://www.classbrainmath.com/pi-calculator/ [accessed September 22, 2017]. - CBE/CSE style
- Cynthia Kirkeby, Pi Calculator [Internet]. ClassBrain Math Tutorials; 2014 February 23, 20:59 UTC [cited 2017 Sep 22]. Available from: http://www.classbrainmath.com/pi-calculator/.
- Bluebook style
- Pi Calculator, http://www.classbrainmath.com/pi-calculator/ (last visited Sep. 22, 2017).
- AMA style
- Cynthia Kirkeby, Pi Calculator. ClassBrain Math Tutorials. February 23, 2014, 20:59 UTC. Available at: http://www.classbrainmath.com/pi-calculator/. Accessed September 22, 2017.