Concrete Footing and Slab Calculator

IMAGE: EXCAVATED FOOTING

Excavated high wind zone footing with horizontal and vertical rebar installed.

The Formula for Concrete Calculation

Calculating the amount of concrete you need for a project is a pretty simple task. Square or rectangular shapes are the easiest to calculate and that’s what we are going to focus on here.

Length (FT) x width (ft) x depth (ft) / 27

Notice our formula measures everything in feet. Typically footing depths and widths are measured in inches. Our calculator has a built in function to convert feet and inches where appropriate. If you are doing manual calculations, it’s pretty easy to convert feet to inches or vice versa.

Common Inch to Feet conversions in construction:

8″ = .67 ft
16″ = 1.33 ft
20″ = 1.67ft

Uses for this formula:

This mathematical formula for concrete calculation will work for footings, slabs, walkways, and driveways where the thickness is consistent.

“It's not the beauty of a building you should look at; it's the construction of the foundation that will stand the test of time.”
DAVID ALLAN COE

Bookmark our page for easy access to the calculator

Memorizing all of the formulas can be tricky, especially when you are out on the job site. You don’t want to miscalculate on materials calculations, it can hurt your pockets big time. Use our calculator as many times as you want.

Services

Concrete Construction

Contact

Ph: 919.980.3009

Ext. 1 – Sales & Inquiries

Ext. 2 – Project Manager

Fax: 919.963.1084

[email protected]

Location

PO Box 1178

Four Oaks, NC 27524

Your local residential construction pros.

We are a full service residential construction company providing earthworks and masonry services. Footing, foundation, and concrete flatwork construction make up our core service offerings.

Working in Johnston, Wake, Wayne, Harnett, Wilson, Franklin, and Nash counties in North Carolina.

919.980.3009

Building Johnston County

Design + Development by ® Color Storm Design

Company

Services

Concrete Construction