Sakrete Concrete Calculator
Estimate the number of concrete mix bags needed for a slab, footing, column, or hole — based on standard Sakrete bag yields. Numbers update as you type.
Sakrete Concrete Calculator: Bags, Volume & Cost Estimator
Use this Sakrete concrete calculator to find the exact number of 60-lb or 80-lb Sakrete bags needed for any project — slab, post, footing, or repair — in under 10 seconds.
Enter length, width, and thickness. The calculator returns bag count, cubic yards (cu yd), cubic feet (cu ft), and total material cost with a built-in 10% waste buffer.
What This Calculator Computes
This tool computes 5 outputs for every Sakrete project:
- Bag count — for both 60-lb (0.45 cu ft coverage) and 80-lb (0.60 cu ft coverage) bags
- Concrete volume — in cubic feet (cu ft), cubic yards (cu yd), and cubic meters (m³)
- Project area — in square feet (sq ft) and square meters (m²)
- Waste-adjusted quantity — adds 10% automatically so the project never runs short
- Estimated cost — based on current average Sakrete pricing at Home Depot and Lowe’s
How to Use the Sakrete Calculator
To calculate Sakrete bags needed:
- Select project type — slab, post hole, deck footing, circular slab, stairs, or curb
- Enter dimensions — length, width, and thickness in feet (ft), inches (in), yards (yd), meters (m), or centimeters (cm)
- Choose bag size — 60-lb or 80-lb Sakrete bag
- Click Calculate — results appear instantly with bag count, volume, and cost
Pro tip: Always buy the waste-adjusted number shown — running short mid-pour ruins the slab.
Sakrete Bag Coverage Chart
Bag Size | Coverage per Bag | Bags per 1 Cu Yd | Bags per 1 Cu Ft |
60-lb | 0.45 cu ft (12.7 L) | 60 bags | 2.2 bags |
80-lb | 0.60 cu ft (17.0 L) | 45 bags | 1.67 bags |
50-lb Fast Set | 0.375 cu ft (10.6 L) | 72 bags | 2.67 bags |
The 80-lb bag is 25% more efficient per dollar — 80-lb bags cost roughly $6.48 vs $5.28 for 60-lb at Lowe’s (April 2026 pricing), but deliver 33% more concrete per bag.
Choose 60-lb bags when carrying bags more than 50 ft (15 m), working alone, or mixing in a wheelbarrow. Choose 80-lb bags for large slabs where efficiency matters more than handling weight.
Sakrete Calculator by Project Type
Slab Pour Calculator
A standard 10 ft × 10 ft (3 m × 3 m) slab at 4 in (10 cm) thick needs:
- Volume: 12.35 cu ft / 0.457 cu yd / 0.35 m³
- 21 bags of 80-lb Sakrete (waste-adjusted: 23 bags)
- 28 bags of 60-lb Sakrete (waste-adjusted: 31 bags)
For slabs thicker than 2 in (5 cm), Sakrete recommends High-Strength Concrete Mix (5,000 PSI) or MAXIMIZER Concrete Mix for high-yield pours.
Post Setting Calculator
A standard fence post hole — 10 in (25 cm) diameter × 24 in (61 cm) deep — needs:
- Volume: 1.09 cu ft / 0.04 cu yd / 0.031 m³
- 2 bags of 80-lb Sakrete Fast Setting Mix
- Sets in 20–40 minutes without mixing — pour dry, add water directly in hole
For 4×4 posts: 1 bag per hole. For 6×6 posts or structural columns: 2 bags per hole.
Deck Footings Calculator
A cylindrical deck footing — 12 in (30 cm) diameter × 36 in (91 cm) deep — needs:
- Volume: 2.36 cu ft / 0.087 cu yd / 0.067 m³
- 4 bags of 80-lb Sakrete (waste-adjusted: 5 bags)
- Use Sakrete 5000 Plus (5,000 PSI at 28 days) for load-bearing deck footings
Slab Repair Calculator
For a repair area 24 in × 24 in (61 cm × 61 cm) at 2 in (5 cm) deep:
- Volume: 0.67 cu ft / 0.025 cu yd
- 2 bags of 60-lb Sakrete Concrete Repair Mix
- Minimum repair depth: 0.5 in (1.3 cm). Maximum single-layer depth: 2 in (5 cm)
Sakrete vs Quikrete: Which Bags Go Further?
Sakrete 80-lb covers 0.60 cu ft per bag. Quikrete 80-lb covers 0.60 cu ft per bag — identical coverage.
The 3 real differences between Sakrete and Quikrete:
Factor | Sakrete | Quikrete |
Founded | 1936 | 1940 |
Fast-set time | 20–40 min | 10–15 min |
PSI range | 4,000–5,000 PSI | 3,500–5,000 PSI |
Calculator tool | 12 project types | 6 project types |
Bag colors | Yellow/black | Gray/red |
Choose Sakrete when the project needs higher sustained PSI (4,000+ at 28 days) or when the 12-calculator tool set helps plan complex multi-type projects. Choose Quikrete when faster set time (10–15 min vs 20–40 min) is critical for post setting in cold weather.
Ngrams & Semantic Entities on This Page
Unigrams (single terms): bags, slab, footing, volume, cubic, calculator, thickness, coverage, PSI, concrete
Bigrams (2-word phrases): concrete calculator, bag count, cubic yard, post hole, slab repair, waste factor, set time, bag size, project type, high-strength
Trigrams (3-word phrases): sakrete concrete calculator, bags per yard, cubic feet coverage, deck footing calculator, fast setting mix, slab pour calculator, waste-adjusted quantity, post setting bags
Semantic entities used:
- Product entities: Sakrete, Quikrete, MAXIMIZER, 5000 Plus, Fast Setting Mix
- Measurement entities: cu ft, cu yd, m³, PSI, lb, kg, in, cm
- Project entities: slab, footing, post hole, repair, resurfacing, masonry
- Intent entities: calculate, estimate, buy, pour, mix, set
Frequently Asked Questions
How many bags of Sakrete do I need for a 10×10 slab?
A 10 ft × 10 ft (3 m × 3 m) slab at 4 in (10 cm) thick needs 23 bags of 80-lb Sakrete including 10% waste, or 31 bags of 60-lb Sakrete.
How many 80-lb bags of Sakrete per cubic yard?
45 bags of 80-lb Sakrete fill 1 cubic yard (0.76 m³). For 60-lb bags, 60 bags fill 1 cubic yard.
What is the coverage of one 60-lb bag of Sakrete?
One 60-lb Sakrete bag covers 0.45 cubic feet (12.7 liters). At 4 in (10 cm) thick, one bag covers approximately 1.35 sq ft (0.13 m²).
How long does Sakrete take to set?
Standard Sakrete Concrete Mix sets in 24–48 hours and reaches full strength (4,000 PSI) at 28 days. Sakrete Fast Setting Mix sets in 20–40 minutes and reaches walkable strength in 4 hours.
Can Sakrete be used for fence posts?
Yes — Sakrete Fast Setting Mix is designed specifically for fence posts. Pour dry mix into the hole, add water, and the post sets without mixing in 20–40 minutes.
Is Sakrete stronger than Quikrete?
Sakrete standard mix reaches 4,000 PSI at 28 days; Quikrete standard mix reaches 3,500 PSI — Sakrete is 14% stronger at the same cure time for standard mixes.
How much does Sakrete cost per bag?
Sakrete 80-lb bags cost $6.48–$7.20 at Home Depot and Lowe’s (April 2026). 60-lb bags cost $5.28–$5.80. Bulk purchases of 50+ bags may qualify for contractor pricing.
Should I add 10% extra when buying Sakrete bags?
Yes — always add 10% to the calculated bag count to account for spillage, uneven subgrade, and measurement variation. The calculator on this page includes this automatically.
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