**A moment ago:**Someone discovered that -2000/10/01 was a Thursday

# Calculate the area of a circle

Use this calculation to calculate the area of a circle. You can use numerous different inputs and choose to submit the radius, the diameter or the circumference of the circle. In the result you will get all unknown variables presented.

#### What is broken?

Is there something wrong with the calculation **Calculate the area of a circle**? Is it a bug or has it gone completely offline? Please, let us know what is wrong! If the calculation did not give you the result you expected, please write which values you used and what you expected the calculation to do.

## Other calculations in geometry (area, volume etc)

## Some random calculations

### Ten most popular

- Calculate when you are sober again after drinking alcohol
- Calculate how many days there are between two given dates.
- Calculate your average speed
- Calculate percent in different ways
- Calculate how many days there are left until a certain date
- Calculate the volume of a cylinder
- Find out which date was/is X days before or after a date
- Calculate the area of a square or rectangle
- Calculate the volume of a cube or brick
- Calculate compound interest