Concrete Bag Calculator
Enter the volume you need and the bag size you're buying. The calculator returns the bag count plus how many pallets that is, with an optional waste allowance.
Your measurements
ft³
Bigger bags yield more concrete each (40 lb ≈ 0.30 ft³ up to 80 lb ≈ 0.60 ft³), so you need fewer — but an 80 lb bag is heavy to carry and mix.
Coverage
- Volume
- 9 ft³
80 lb bags needed
15 bags
What to buy
- Bag yield
- 0.6 ft³/bag
- Pallets
- 0.4 pallets(42/pallet)
Estimates only. Verify against your supplier's coverage figures before ordering.
The formula
Bags = Cubic feet ÷ bag yield (yields: 40 lb 0.30, 50 lb 0.375, 60 lb 0.45, 80 lb 0.60 ft³)
Example: For 9 ft³ using 80 lb bags: 9 ÷ 0.6 = 15 bags. Pallets usually hold 42 × 80 lb bags.
How it works
- 1Each bag yields a fixed volume of mixed concrete: 0.30 ft³ (40 lb), 0.375 ft³ (50 lb), 0.45 ft³ (60 lb), or 0.60 ft³ (80 lb).
- 2Divide the volume you need by the bag yield to get the bag count.
- 3Round up — you can't buy a partial bag — and add an optional waste allowance.
Frequently asked questions
How many bags of concrete are on a pallet?
A pallet typically holds 42 × 80 lb bags, 56 × 60 lb bags, or 80 × 40 lb bags, though this varies slightly by brand.