# Area of a circle Calculator

## Calculates the area and circumference of a circle given the radius or diameter. | ||

- Purpose of use
- Design a firepit

- Purpose of use
- Working out how and what size small holes I need to drill into a plastic pressure pipe if end is blocked off and need to keep roughly the same flow/pressure.

- Purpose of use
- determine amount of concrete in 4 foot diameter pile vs. 3 ft. diameter pile

- Purpose of use
- To calculate area of inner and outer circle's to determine amount of seed needed for each ring

- Purpose of use
- help with a question

- Purpose of use
- To expose me more understanding
- Comment/Request
- nice

- Purpose of use
- CEU''s re-newing my certification
- Comment/Request
- It''s great because I don''t have to do the laborious math long hand in a note book! Where was this when I was in college? Oh, that''s right the internet, apps and calculators weren''t invented then, just the old trusty slide rule.

- Purpose of use
- To be able to ease my work of calculation

- Purpose of use
- verify manual calculations involved in modifing a automotive combustion engine using different varribles for optimum horsepower to torque at given RPM

- Purpose of use
- Determine area of different diameter pizzas to calculate best buy for price!
- Comment/Request
- Thank you !

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