# Changing a Circle to a Square

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

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

Side Length
length = √ (CA)
where CA = the area of the circle

Perimeter
perimeter = length * 4

### Circle to Square

Select unit:
diameter of the circle {{selectedunit.m1}}
decimal rounding # of digits in results

#### Results:

 circle's radius {{selectedunit.m1}} area of the circle {{selectedunit.m1}}² circumference of the circle {{selectedunit.m1}} side length of the square {{selectedunit.m1}} perimeter of the the square {{selectedunit.m1}}

#### Calculation

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

#### Results

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

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