Its like magic to change a circle into a square, click the button and poof there you have it!!

This calculator converts the area of a circle into a square with four even length sides and four right angles. The calculation is based on the area of the square being the same as the circle's area.

Circle Formula's

Radius

R = D ÷ 2

where R = radius, D = diameter

Area;

A = π * D² ÷ 4

where A = area, π = 3.14159..., D = diameter

Circumference;

C = 2 * π * D ÷ 2

where C = circumference, π = 3.14159...., D = diameter

Square Formula's

Area

Area = length * length

The square side length (calculated from the circle's area)

side length = √ (A)

where A = the area of the circle

Perimeter

perimeter = length * 4

Calculation

1. enter the diameter of a circle
2. number of decimal places required in results

Results

1. radius of the circle
2. the area of the circle
3. the perimeter of the circle (circumference)
4. side of the square's length
5. perimeter of the square

Area and Perimeter of Various Shapes

• Circle - Imperial
• Circle - Metric
• Circle Segment
• Circular Segment - Imperial
• Circular Segment - Metric
• Donut
• Ellipse
• Equilateral Triangle
• Isosceles Triangle
• Multiple Shapes
• Octagon
• Pentagon
• Quatrefoil
• Rectangle or Square
• Right Angled Triangle
• Trapezoid

Changing the shape of an Area

• Circle to an Oval
• Circle to a Rectangle
• Circle to a Right Angled Triangle
• Circle to a Square

Acreage or Building Lot Calculators

• Perimeter of an Acreage or Building Lot
• Lot and Building Envelope Square Footage

Stadium Calculators

• Stadium within a Stadium Shape