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- Calculate area of circle from diameter
- Circle circumference to diameter calculator
- Circle radius to diameter calculator
- Convert an area to different units
- Length and distance converter
- Sphere volume to diameter calculator
- Sphere surface area to diameter calculator
This tool will calculate the diameter of a circle from the area, and will convert different measurement units for area and diameter.
The formula used to calculate the circle diameter is:
ø = 2 · √(A / π)
- ø = Circle diameter
- A = Circle area
- π = Pi = 3.14159…
Area of Circle
Enter the area contained within a circle.
Diameter of Circle
This is the diameter of a circle that corresponds to the specified area. The diameter of a circle is the length of a straight line drawn between two points on a circle where the line also passes through the centre of a circle, or any two points on the circle as long as they are exactly 180 degrees apart.