Columns with Pads Concrete Volume Calculator

Calculate the amount of concrete needed for a column and pad using feet and inches as measurements.

Columns need to be supported by a footing. In some cases, these can be the same footings that support your foundation wall, but in most cases, they need to have a separate footing, also known as a pad. For round columns, these pads usually are square.

To calculate the volume of concrete for a column, you need the diameter and height. And for a square pad, the length of one side and the thickness (depth) of the pad.

Concrete Pad - Imperial

Calculation

enter the number of columns and pads
the diameter of the column in inches
the height of the column in feet and inches
length of one side of the pad in feet and inches
depth of the pads in inches

Results

lineal feet of forming tube for the columns (rounded up)
forming material for the pads, lineal feet (rounded up)
amount of concrete needed in cubic feet
concrete needed in cubic yards
concrete needed in cubic metres

Formula

for the column;

V = π * D² ÷ 4 * h * n

for the pad;

V = w² * d * n

where V = volume
π = 3.14159...,
D = diameter
h = height of the column
w = pad length
d = pad thickness
n = number of pads and columns

Example calculation;

column diameter = 10 inches 
column height = 4 feet -  8 inches
pad size = 28 inches  x 28 inches
thickness of pad = 10 inches
4 columns and pads

Since it is easier to calculate using the same units, convert the 4 feet - 8 inches into inches by multiplying the feet amount by 12 ( 12 inches in one foot);

4 * 12 + 8  = 56

4 feet - 8 inches =  56 inches

Using the formula for the columns from above;

3.14159 * 10² ÷ 4 * 56 * 4

3.14159 * 100 ÷ 4 * 56 * 4 = 17592.92 rounded to two decimals

The volume of the  four columns is 17592.92 cubic inches

Using the formula for the pads from above;

28² * 10 * 4

784 * 10 * 4 =  31360

The volume of the  four pads is 31360 cubic inches

Adding both results and converting the cubic inches to cubic feet by dividing the cubic inch amount by 1728 (there are 1728 cubic inches in one cubic foot)

(17592.92 + 31360) ÷ 1728

48,952.92 ÷ 1728 = 28.3 rounded to one decimal

You will need 28.3 cubic feet of concrete to pour these four columns and pads.

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. It is recommended, depending on the job you are doing, to add anywhere from an extra 4% to 10% to your concrete order 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.

Columns with Pads Concrete Volume Calculator

Concrete Pad - Imperial

Amount of Concrete Needed in:

Calculation

Results

Formula

Example calculation;

When Ordering Concrete

Concrete Volume Calculators

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