Spike's Calculators

Calculate the amount of concrete needed for pouring columns with results for concrete needed in cubic feet, yards, and metres. To calculate the volume of a column (cylinder), you need to know the column's diameter and height.

The lineal foot amount of tubing (forming material) is rounded upwards to the nearest whole foot, but more than likely, you will end up wasting some of the material!

- enter the number of columns
- the diameter of the columns
- the height of the columns

- the length of tubing material needed in lineal feet (rounded up to the nearest whole foot)
- the amount of concrete needed in cubic feet
- in cubic yards
- in cubic metres

V = Π * D² ÷ 4 * h where V = concrete volume in cubic feet pi = 3.14159...... D = diameter h = height

column height= 4 feet - 6 inches diameter = 10 inches 5 columns

Convert 4 feet- 6 inches into inches;

4 * 12 + 6 = 54

4 feet - 6 inches = 54 inches.

Using the formula from above

3.14159 * 10² ÷ 4 * 54 * 5 = 21205.750

The volume is 21205.750 cubic inches

Convert this to cubic feet by dividing this amount by 1728 (there are 1728 cubic inches in one cubic foot);

21205.750 / 1728 = 12.27 rounded to two decimals

You need 12.27 cubic feet of concrete for these five columns.

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

- Circle
- Circle - Metric
- Donut
- Donut - Metric
- Ellipse
- Ellipse - Metric
- Equilateral Triangle
- Equilateral Triangle - Metric
- Octagon
- Octagon - Metric
- Oval
- Pentagon
- Pentagon - Metric
- Scalene Triangle
- Scalene Triangle - Metric
- Stadium Shape
- Stadium Shape - Metric
- Trapazoid
- Trapezium
- Plastic Concrete Footing Form