Strip Foundation Cost Estimator (Concrete & Rebar)
Calculate costs for strip footings/trench foundations. Estimates concrete volume, rebar, and formwork with localized pricing databases for US/UK/Canada.
Total Estimated Cost
| Material | Quantity | Est. Cost |
|---|
*Prices are regional averages. Consult local suppliers.
About
A strip foundation (or trench footing) is a continuous strip of concrete used to support load-bearing walls. Accurate estimation of materials is financially critical; under-ordering ready-mix concrete results in expensive "short load" fees and cold joints, while over-ordering eats into the project margin. This tool calculates the exact volume required based on perimeter, width, and depth, accounting for a user-defined waste factor. It simultaneously calculates the linear footage of rebar required (based on the number of bars per trench) and generates a cost estimate using regional material price averages.
Formulas
The volume V is derived from the total perimeter P, width W, and depth D:
Total Rebar Length Lrebar depends on the number of longitudinal bars (n):
Reference Data
| Material | Typical Unit | Approx. Cost (US) | Waste Factor rec. |
|---|---|---|---|
| Ready-Mix Concrete | yd3 | $125 - 150 | 5 - 10% |
| Pre-Mix Bags (60lb) | Bag | $4.50 | 10% |
| Rebar (#4, 1/2") | ft | $0.60 | 5% |
| Lumber (2x10) | ft | $1.50 | Reusable |