Circle area calculator, formulas, practical use.

Circle area and circumference calculations

The circle area calculator is designed for calculations of radius, diameter, circumference or area of a circle. For successful calculation, you need to know and enter into the calculator at least one of them. Then press send or enter to run calculations.

Circle parameters sketch:

area

Circle calculator form:


Unit system:




Circle calculator variables and constants explanation:

r – radius
C – circumference
d – diameter
A – area
π– 3,1415926535
– unspecified values
specified values
calculated values

The formula for circle
circumference calculation:

Circle circumference formula

The formula for circle
area calculation:

Circle area formula

Circle calculator use:

Circle calculation is used in many industries and in a huge number of calculations. This is at least some of them:

  • perimeter of a tree trunk, limb, twig, stem, pipe, tube, hose, duct, wire, rod, cord, thread, rope, tunnel, pillar
  • cross-sectional area of a tree trunk, limb, twig, stem, pipe, tube, hose, duct, wire, rod, cord, thread, rope, tunnel, pillar
  • partial calculations of geometric shapes like cilinder, cone, sphere, barrel, torus and other rotational shapes
  • school calculations