Concrete for Footers

The Volume of Concrete in a Footer calculator computes the volume of concrete in a complete rectangular footer (e.g. the footer under a rectangular house/building) based on the length and width of overall foot print and the depth and width of the footer channel (see diagram).

INSTRUCTIONS: Choose units and enter the following: 

• (L) Footer Area Length
• (W) Footer Area Width 
• (D) Footer Depth
• (T) Footer Channel Width

Volume of Concrete (V):  The volume of concrete (V) needed for the footer is returned in cubic yards.  However, this can be automatically converted into other volume units (e.g. cubic meters) via the pull-down menu.  The calculator also returns the equivalent volume in bags of concrete:

• 40lb bag - units of 40 pound bags of concrete mix
• 60lb bag - units of 60 pound bags of concrete mix
• 80lb bag - units of 80 pound bags of concrete mix

Note:  It is important to remember that the length and width of the footer are more than the length and width of the foundation.