Footing Concrete: Dig, Pour, Bags or Ready-Mix

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Opens on the book's own wall. Change any number to your own and press Calculate.

Footing length m

Footing width m

Footing thickness m

Trench depth m

Waste allowance %

Bag yield ft³ per bag (read the label)

Bag weight lb

Bag price

Ready-mix price per yd³

Short-load fee per yd³

Concrete density kg/m³

Enter the footing and press Calculate.

From the book, Chapter 3. The book's footing is 6.6 × 0.6 × 0.3 m in a trench 0.75 m deep: 2.97 m³ to dig, 1.188 m³ of concrete, a 1.75 yd³ ready-mix order, or 77 bags weighing 6,160 lb.

Ready-mix is ordered in quarter yards; small loads carry a short-load fee. A bag's yield is printed on the bag: use yours. Prices are illustrative US home-center prices from October 2026, shown without a currency sign; put in your own. Everything stays in your browser: no sign-up, nothing stored.