Enter one footing run's length, width, and depth plus how many identical runs — yards, truckloads, and bag counts solve live.
Length of one footing run.
Identical footing runs.
Labor (optional)
Order quantity
1.45
CU YDS
Bill of materials+10% waste
Ready-mix concrete
1 truckload — short-load fee likely
Net 1.32 cu yd · Waste +0.13 cu yd
80-lb bags (alt.)
Net 59 bags · Waste +10%
60-lb bags (alt.)
Net 79 bags · Waste +10%
Cost projection
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Order quantity
1.45 cu yd
Strip footing volume is length × width × depth ÷ 27 — a 40 ft × 16 in × 8 in footing is 40 × 1.33 × 0.67 ÷ 27 ≈ 1.32 cubic yards before waste.
Enter one footing run's length, width, and depth plus how many identical runs — yards, truckloads, and bag counts solve live.
Order 5–10% extra for over-excavation and form spread; trench bottoms are rarely perfect.
Most ready-mix suppliers charge a short-load fee under 4 yards — combine small footings into one pour when you can.
A cubic yard of concrete needs about 45 eighty-pound bags or 60 sixty-pound bags of premix.
V = L × W × D ÷ 27
Volume = length × width × depth ÷ 27. A 40 ft × 16 in × 8 in footing is about 1.32 cubic yards net — order roughly 1.45 yards with 10% waste.
Below the local frost line — commonly 12–36 in depending on climate — and always bearing on undisturbed soil. Check local code before you dig.
Yes — order 5–10% extra for over-excavation and form spread. Trench bottoms are rarely perfect.
About 45 eighty-pound bags or 60 sixty-pound bags of premix per cubic yard.
Ready-mix wins above roughly a yard; below that, bags avoid the short-load fee most suppliers charge under 4 yards. This tool prices both so you can compare.
Keep estimating
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