Acreage Calculator

The first dimension: side, length, base, or the semi-major axis of an ellipse.
The second dimension: width, second parallel base, second side, or semi-minor axis.
Third side for Heron's formula.
Annulus only.
Regular polygon only.
Central angle for a sector or segment; the included angle for a two-sides-and-angle triangle.
Area
78.539816
Area Calculator
Area unit
m2
Area in square metres
78.539816 m2
Area in square feet
845.395547 ft2
Perimeter
31.415927
Perimeter unit
m
Shape
Circle
Formula used
A = pi r^2
Worked out from CRC Standard Mathematical Tables and Formulae, Geometry: areas and perimeters of plane figures and 3 other sources.

How this is worked out

5 steps
  1. Shape: Circle. Dimensions are in m.
  2. Formula: A = pi r^2.
  3. Area = 78.53981633974483 m2.
  4. In SI: 78.53981633974483 m^2 (= 845.3955472258481 sq ft).
  5. Perimeter = 31.41592653589793 m.

Results are general information, not financial, tax, legal, medical or engineering advice.