Footing Calculator — Concrete, Rebar & Form Materials
Calculate concrete volume, rebar requirements, form materials, and cost for continuous, spread, stepped, and T-shaped footings. Supports up to 10 footings.
4
Footing Types
10
Max Footings
2
Systems
100%
Free to Use
Enter Footing Details
Your Results
Ready to Calculate
Enter your footing dimensions and click Calculate to see estimates.
Total Concrete Volume
0 cu yd
Total Rebar Length
0 ft
Form Materials
0 sq ft
Form plywood & lumber
80 lb Bags
0 bags
Ready Mix Trucks
0 trucks
Estimated Total Cost
—
Calculation Summary
Footing TypeContinuous
Number of Footings0
Dimensions0 × 0 × 0
Total Volume0 cu yd
Rebar—
Total Cost—
Frequently Asked Questions
A footing is a structural element that transfers building loads to the soil. It is typically wider than the wall it supports and is made of reinforced concrete. Common types include continuous (spread) footings, isolated footings, stepped footings for sloped sites, and T-shaped footings.
For a continuous footing: multiply length by width by depth to get cubic feet, then divide by 27 for cubic yards. For T-shaped footings, add the stem volume (stem width × stem height × length). This calculator handles all footing types and multiple footings.
Rebar requirements depend on the footing size and structural loads. Typically, continuous footings use 2–6 longitudinal bars with vertical stirrups. This calculator estimates total rebar length based on the number of bars and footing length. Always consult structural engineering plans.
Form materials include plywood sheets, lumber (2x4s and 2x6s), stakes, and form ties. The form area is calculated as the total surface area of the footing sides that require forming. Standard plywood sheets are 4ft × 8ft (32 sq ft per sheet).
A T-shaped footing combines a wide base with a narrower stem wall on top, forming a T shape in cross-section. It's commonly used for foundation walls to provide a wider bearing surface while using less concrete than a full-width footing to full height.