Work out concrete column volume instantly with clear inputs, formula shown and shareable results.
A rectangular column is a simple prism, so volume is width times depth times height, multiplied by the number of identical columns. Formwork area is the perimeter of the section times the height, which is the figure shuttering is priced and hired against.
Column volume
V = width x depth x height x number of columns
Formwork
Area = 2 x (width + depth) x height x count
V = width x depth x height x number of columns. A rectangular column is a simple prism, so volume is width times depth times height, multiplied by the number of identical columns.
No. Steel occupies about 1-2 percent of the section, which is well inside the waste allowance, and no supplier prices concrete that finely.
This calculator takes 4 inputs: Column width, Column depth, Column height, Number of columns. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.