Column + Pad Concrete Volume Calculator - Metric
Columns need to be supported by footings. In some cases, this can be the same footings that support your foundation walls, but more often or not, they are on a separate footing, also known 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 the depth of the pad.
Using imperial measurements? Switch to the Column Pad Calculator - Imperial.
More concrete calculators in metric:
Column & Pad Concrete Calculator
Calculator
- enter the number of columns and pads required
- diameter of the column in millimetres
- the height of the column(s)
- length of one side of the pad in metres
- depth of pad (thickness) in millimetres
Results
- amount of concrete needed in cubic metres
- converted into cubic yards
- concrete needed in feet
Formula
columnV = π * D² ÷ 4 * h * n
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 = 254 millimetres = 0.254 metres column height = 1.5 metres pad size = 0.7 metres x 0.7 metres thickness of pad = 254 millimetres = 0.254 metres 5 columns and pads
Calculating the volume of the columns using the above formula:
3.14159 * 0.254² ÷ 4 * 1.5 * 5
3.14159 * 0.064516 ÷ 4 * 1.5 * 5 = 0.380
The columns have a volume of 0.380 cubic metres.
Calculating the volume of the pads;
0.7² * 0.254 * 5
0.49 * 0.254 * 5 = 0.6223
The volume of the five pads is 0.6 cubic metres.
Adding both results together;
0.380 + 0.6223 = 1 .002
It will take 1 cubic metres of concrete to pour these five columns with pads.
Conversions
To convert cubic metres to cubic yards multiply cubic metres * 1.30795061931439 To convert cubic metres to cubic feet multiply cubic metres * 35.3146667214886