Concrete Footing Calculator

Calculate concrete volume for continuous strip footings. Enter footing length, width, and depth for cubic yards and bag counts.

πŸ—οΈ Concrete Footing Calculator

Results

Volume35.56 cu ft
Volume1.32 cu yd
60 lb Bags80 bags
80 lb Bags60 bags

πŸ’‘ How to Calculate Concrete Footing Volume

Continuous footings (strip footings) run along the base of foundation walls. The volume calculation is straightforward: length Γ— width Γ— depth. Standard residential footings are typically 16–24 inches wide and 8–12 inches deep, extending at least 12 inches below the frost line.

Building codes generally require footings to be twice the width of the wall they support. For an 8-inch foundation wall, the footing should be at least 16 inches wide. Rebar reinforcement (typically #4 bars) is required in most jurisdictions.

A 40 ft perimeter footing, 16 inches wide Γ— 8 inches deep: volume = 40 Γ— 1.33 Γ— 0.67 = 35.7 cu ft = 1.32 cu yd. That is about 59 bags of 80 lb concrete.

Concrete Footing Calculator FAQ

πŸ”— Related Calculators

Concrete CalculatorCalculate how much concrete you need for slabs, footings, and columns. Get results in cubic feet, cubic yards, and ready-mix bags (60 lb & 80 lb).Concrete Block CalculatorCalculate how many concrete blocks (CMU) you need for a wall. Enter wall dimensions and block size to get total blocks with 5% waste, mortar bags, grout fill, and cost estimate. Supports standard and custom sizes.Concrete Slab CalculatorCalculate concrete volume for flat slabs β€” patios, garage floors, driveways. Enter dimensions and thickness for cubic yards, bags, and cost.Square Footage CalculatorCalculate the square footage of any space β€” rectangle, triangle, circle, trapezoid, or rectangular border. Convert to sq m, sq yd, and acres. Estimate project cost with price per sq ft.