Sakrete Concrete Calculator: Bags per Yard, Post and Slab
One 80 lb bag of Sakrete High-Strength Concrete Mix yields 0.6 cubic feet, so a cubic yard takes 45 bags; a 10×10 ft slab at 4 in takes 62 bags with 10% extra.
Advanced options: waste, prices
NRMCA advises ordering 4 to 10 percent over the estimate.
Concrete needed (with 10% extra)
1.96 yd³
1.50 m³ · 48 ft³ before extra
Slab: 12 ft × 12 ft × 4 in. Over about 1 yd³: order ready-mix.
Premix bags
- 80 lb88
- 60 lb118
- 50 lb141
- 40 lb176
- Ready-mix cost
- $313
- Weight
- 7,200 lb
Full breakdown
| Volume before extra | 1.78 yd³ · 1.36 m³ |
|---|---|
| With 10% extra | 1.96 yd³ |
| Weight (150 lb/ft³) | 7,200 lb · 3.60 tons |
| Pallets of 40 lb (80 bags each) | 3 |
| Pallets of 60 lb (56 bags each) | 3 |
| Pallets of 80 lb (42 bags each) | 3 |
| Truckloads at 12 yd³ | 1 |
| Truckloads at 8 yd³ | 1 |
Bag counts round up, as Quikrete's own calculator does. Cost uses your prices; delivery and short-load fees are extra.
Key takeaways
- 80 lb Sakrete High-Strength = 0.6 ft³; 45 bags per yard.
- High-Strength 4,000 psi; Maximizer 5,500 psi (Oldcastle APG).
- High-Strength is for concrete thicker than 2 in.
- Dry-pour posts only with fast-setting mix (Sakrete).
How Many Bags of Sakrete Do I Need?
You need the concrete volume plus 10% extra, divided by the bag yield: 0.6 ft³ for an 80 lb bag of Sakrete. A 10×10 ft slab at 4 in needs 62 bags of 80 lb Sakrete; a 4×4 post in a 12 in hole 2 ft deep needs 3.
Concrete Calculator Yards is not affiliated with Sakrete; product facts come from Sakrete's maker, Oldcastle APG.
Sakrete Bag Yields: 40, 50, 60 and 80 lb
Sakrete High-Strength Concrete Mix in the 80 lb bag yields 0.6 ft³, according to Oldcastle APG; check the label of other sizes for their yield.
| Bag | Yield (ft³) | Bags per yd³ |
|---|---|---|
| 80 lb | 0.6 | 45 |
How Many Bags of Sakrete per Yard?
A cubic yard takes 45 bags of 80 lb Sakrete High-Strength mix before extra, or 50 with 10% extra.
How Many Square Feet Does a Bag of Sakrete Cover?
One 80 lb bag of Sakrete covers 1.8 sq ft at 4 in thick, 2.4 sq ft at 3 in and 3.6 sq ft at 2 in.
| Bag | 2 in | 3 in | 4 in |
|---|---|---|---|
| 80 lb | 3.60 sq ft | 2.40 sq ft | 1.80 sq ft |
Sakrete Bags per Fence Post and Sonotube
| Project | 80 lb bags | 60 lb bags |
|---|---|---|
| 4×4 post, 12 in hole, 2 ft | 3 | — |
| 6×6 post, 18 in hole, 3 ft | 9 | — |
| 8 in sonotube, 4 ft | 3 | — |
| 12 in sonotube, 4 ft | 6 | — |
60 lb vs 80 lb Sakrete Bags: What Is the Difference?
The difference is the amount of the same mix: the 80 lb Sakrete bag yields 0.6 ft³ (Oldcastle APG), and a 60 lb bag yields less, as printed on its label. This calculator's 60 lb column uses Quikrete's 0.45 ft³ yield.
Which Sakrete Mix for Which Project?
Sakrete makes several concrete mixes; this calculator uses the 0.6 ft³ yield of the 80 lb High-Strength mix.
- High-Strength Concrete Mix: 4,000 psi; for concrete thicker than 2 in (51 mm), according to Oldcastle APG.
- Maximizer Concrete Mix: 5,500 psi; lightweight high-yield mix.
Sakrete vs Quikrete Bag Yields
Sakrete High-Strength and Quikrete Concrete Mix both yield 0.6 ft³ per 80 lb bag and are both rated at 4,000 psi, so bag counts match. Sakrete pallets usually hold 42 bags of 80 lb, per retailer listings; confirm with your store. See the Quikrete calculator.
Worked Examples With Sakrete
10×10 ft slab at 4 in. 33.33 ft³ × 1.1 ÷ 0.6 = 62 bags of 80 lb Sakrete High-Strength.
12×12 ft slab at 4 in. 48 ft³ × 1.1 ÷ 0.6 = 88 bags of 80 lb.
Six 4×4 fence posts, 12 in holes, 2 ft deep. 6 × 1.40 = 8.4 ft³ × 1.1 ÷ 0.6 = 16 bags of 80 lb.
How to Calculate How Much Sakrete You Need
- Measure the pour and find cubic feet.
- Add 10% for waste.
- Divide by 0.6 for the 80 lb High-Strength bag.
- Round up.
Sakrete's Quick Rule: One Pallet Is About a Yard
Sakrete's estimating guide says one pallet of bags is about a cubic yard of concrete; with 42 bags of 80 lb at 0.6 ft³ each, a pallet makes 25.2 ft³, a little under 27.
Sakrete Concrete Calculator FAQ
How much does an 80 lb bag of Sakrete cover?
An 80 lb bag of Sakrete High-Strength yields 0.6 ft³, which covers 1.8 sq ft at 4 in thick.
Can I just pour concrete over dirt?
On firm, well-drained Group I soil the IRC allows a slab without a base course; elsewhere add a 4 in gravel base. See gravel base calculator.
Next step
See how it compares on Sakrete vs Quikrete, or count any brand on the concrete bag calculator.
Official sources
Last reviewed 2026-11-05. Numbers come from our tested engine; see how we calculate and our sources.