Quick answer
Estimate concrete volume for simple rectangular footings from footing length, width, depth and number of identical footings. Use the working RenoMetric calculator below for the actual estimate, then use this page to check assumptions, package rounding and project-specific considerations.
Open the working Concrete calculator
Formula
Worked planning example
Four footings measuring 2 × 2 × 1 ft each require 16 ft³, or about 0.59 yd³, before allowance.
Common uses
- Deck footings
- Small wall footings
- Post bases
- Accessory structures
How to get a better estimate
Measure the actual project rather than relying on listing dimensions. For irregular spaces, split the surface into simple measurable sections and add the results. Use the exact product label for package coverage, yield, density or square-foot coverage whenever it is available.
Keep waste and package rounding as separate steps. Waste covers cuts, breakage, pattern matching and unavoidable offcuts. Package rounding reflects the fact that many materials are sold only in complete bags, boxes, bundles or cans.
Before you buy: this page is a planning guide, not a contractor quotation or structural design. Verify final quantities with the product manufacturer, supplier or installer when project conditions could materially change the result.
Concrete Footing Calculator FAQ
Can this size a footing for me?
No. It only estimates material from dimensions you provide. Footing size is a structural and site-specific decision.
How do I calculate multiple footing sizes?
Calculate each footing group separately and add the concrete volumes.
Should form volume be included?
Use the actual concrete dimensions that will be poured, not the outside dimensions of reusable form components.