# Column + Pad Concrete Volume Calculator - Imperial 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 this can be the same footings that support your foundation walls, but more often or not they will be placed on their own separate footing, also know as a pad. For round columns these pads usually are square.

To calculate the volume for a column plus pad you need the diameter and height of the column plus the length of one of the sides and depth of the pad.

##### Formula used:
```V = (pi; * D² ÷ 4 + ( w²*d))*n
where V = volume
pi = 3.14159...,
D = diameter
n = number of pad and columns```
##### Example calculation
number of pads and columns = 4
column diameter = 10" --- height = 4' 8"
pad size = 28" x 28" x 10"

since most of it is in inches convert 4' 8" to inches
Column
3.14159 *10 * 10 ÷ 4 * 56 * 4 = 17592.919 cubic inches
28 * 28 * 10 * 4 = 31360? cubic inches

Combined total = 17592.919 + 31360 = 48952.919? cubic inches
There are 1728 cubic inches in one cubic foot. Divide the inches by 1728 to convert them to cubic feet. 48952.919 ÷ 1728 = 28.329 . You will need 28.329 cubic feet of concrete to pour these 4 columns and pads # Number Columns and Pads #
Column Diameter in
Column Height ft in
Depth in

 Lineal Foot Length of Tube lin/ft Forming Material for Pads lin/ft Amount of Concrete Needed in: Cubic Feet ft ³ Cubic Yards yd ³ Cubic Metres m³

#### Calculation

1. enter the number of columns and pads required
2. diameter of the column in inches
3. square pad size in feet and inches

#### Results

1. lineal feet of forming tube for the column(s) (rounded up)
2. forming material for the pads, lineal feet (rounded up)
3. amount of concrete needed in cubic feet
4. concrete needed in cubic yards
5. concrete needed 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. 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.