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Volume of a rectangular pour
The base formula for a slab, pad or rectangular footing. Every length must be in the same unit before multiplying.
The Formula
V = L x W x T
The base formula for a slab, pad or rectangular footing. Every length must be in the same unit before multiplying.
| Symbol | Meaning | Unit | Notes |
|---|---|---|---|
| L | Length | metres | Measured along the longer side of the pour. |
| W | Width | metres | Measured across the pour. |
| T | Thickness | metres | Millimetres divided by one thousand gives metres. |
| V | Volume | cubic metres | The quantity ordered, in cubic metres. |
What Each Symbol Means
Lmetres
Length
Measured along the longer side of the pour.
Wmetres
Width
Measured across the pour.
Tmetres
Thickness
Millimetres divided by one thousand gives metres.
Vcubic metres
Volume
The quantity ordered, in cubic metres.
See It Worked With Real Numbers
A formula on its own does not tell you which number goes where. The how to calculate concrete volume page applies this equation to a concrete case, shows every intermediate step, and names the mistakes that produce a wrong answer even when the algebra is right.
Where This Formula Appears
This equation is the working core of How To Calculate Concrete Volume, filed under Everyday Life. Every number the guide produces comes from substituting into this one line.