Spike's Calculators

# 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.

### Ellipse Shaped Slab Calculator

Length A:   ft  in
Length B:   ft  in
Depth:   in
Waste:   %
Area:   ft ²
Perimeter:   lin ft

#### Amount of concrete needed:

Cubic Feet:   ft ³
Cubic Yards:   yd ³
Cubic Meters:   m ³

#### 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

### When Ordering Concrete

This concrete calculator will help you in estimating the amount of concrete needed for your project. The amount given as needed does not include any waste. Depending on your job, we recommend adding anywhere from an extra 4% to 10% to your concrete required calculation to make sure you have enough concrete to finish the job. Ask when ordering the concrete. They will be able to give you a good idea of what is needed.
##### 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.`