Online area calculators of various shapes, applicable in everyday life. Calculate the area of surface to find out how much material you need to cover it.

## Circle Area Online Calculator by Diameter, Radius or Circumference

The circle does not have angles and straight sides, so calculating the area of this geometric figure was not an easy task. But ancient scientists coped with this task and invented all possible formulas. You do not need to remember them, because you can use our simple, fast and handy [...]