Ellipse Shaped Concrete Volume

Calculate the amount of concrete you will need to pour an Ellipse (Oval) shaped slab, using feet and inches for measurements.

Formula

Area = 𝛑MN
Perimeter = 2𝛑√(M²+N²)/2
where 𝛑 equals 3.14159
M is length A ÷ 2
N is length B ÷ 2

To convert cubic feet to cubic yards, multiply cubic feet * 0.037037037037037
To convert cubic feet to cubic metres, multiply cubic feet * 0.028316846592
To convert cubic yards to cubic metres, multiply cubic yards * 0.764554857984 

Example Calculation

Length A = 22 feet
Length B = 10 feet
Depth = 6 inches

Area

M = 22 ÷ 2         M = 11 
N = 10 ÷ 2         N =  5

3.14159 * 11 * 5 =  172.787595947  rounded to 172.79

The surface area of this slab is 172.79 square feet.

Perimeter

2 * 3.14159 * √(11² + 5²) ÷ 2 
2 * 3.14159 * 8.544  = 53.683558797 rounded to 53.6 

The perimeter (circumference) of the slab is 53.6 lineal feet.

Volume

Multiply the area square footage by the depth of the slab.
First, convert the 6 inches to feet by dividing by 12.

6 ÷ 12 = 0.5

6 inches = 0.5 feet

172.79 * 0.5 = 86.395 rounded to 86.4

You will need 86.4 cubic feet of concrete for this slab.

Calculation

1. enter the length of A in feet and inches
2. the length of B in feet and inches
3. the slab depth in inches
4. waste factor (if required) in a percentage

Results

1. the area of the slab in square feet
2. the perimeter (circumference) in lineal feet
3. the amount of concrete needed in cubic feet
4. in cubic yards
5. in cubic metres