Concrete Calculator
Calculate concrete volume for slabs, footings, pads and post holes from length, width and depth. Results show cubic feet, cubic yards and cubic meters, plus bag counts for pre-mix or ready-mix quantity.
Concrete Calculator
Concrete & Construction
ft
ft
in
%
Concrete volume
1.63yd³
44 ft³ · 1.25 m³
80 lb bags
74bags
0.60 ft³ per bag
60 lb bags
98bags
40 lb bags
147bags
Ready-mix to order
2yd³ (½ yd³ steps)
Add 5–10% when ordering trucks
Calculation breakdown
- 1Raw volume:
3.66 × 3.05 × 0.1 = 1.133 m³ - 2With waste:
× 1.10 = 1.246 m³ - 3Conversions:
44 ft³ ÷ 27 = 1.63 yd³
- Post holes: compute per hole (πr²×depth) and multiply, or use the Fence Calculator.
Volume = Length × Width × Depth.
1 yd³ = 27 ft³ = 0.764554857984 m³.
Bag yields (typical pre-mix): 80 lb → 0.60 ft³ · 60 lb → 0.45 ft³ · 40 lb → 0.30 ft³.