Calculate Sakrete bagged concrete, mortar, and 5000 Plus high-strength mix quantities, water ratios, and coverage for DIY and masonry.
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A Sakrete calculator estimates the required quantity of Sakrete brand pre-blended concrete, sand mix, mortar, or high-strength 5000 Plus bags. It accounts for volume, density yield, water-to-cement ratios, and job site overage.
\text{Bags} = \left\lceil \frac{\text{Length (ft)} \times \text{Width (ft)} \times \left(\frac{\text{Depth (in)}}{12}\right) \times 1.10}{\text{Bag Yield (cu ft)}} \right\rceilAn 80-lb Sakrete bag yields 0.60 cu ft (45 bags/cu yd). A 60-lb bag yields 0.45 cu ft (60 bags/cu yd). A 10% waste buffer is automatically included.
Scenario: Pouring a 10 ft by 8 ft patio slab with a 4-inch depth using 80-lb Sakrete concrete bags.
Volume: 10 ft × 8 ft × 0.333 ft = 26.67 cu ft (0.99 cu yds).
Add 10% contingency: 26.67 × 1.10 = 29.34 cu ft.
Divide by bag yield: 29.34 ÷ 0.60 cu ft per 80-lb bag = 48.9 bags.
Round up: 49 bags of 80-lb Sakrete with 43 gallons of clean mixing water.
It takes exactly 45 bags of 80-lb Sakrete to yield one cubic yard (27 cubic feet) of mixed concrete.
It takes 60 bags of 60-lb Sakrete (0.45 cu ft per bag) to make one cubic yard of concrete.
An 80-lb bag of Sakrete concrete requires approximately 3.5 quarts (0.875 gallons) of clean water. Add water gradually until a firm, workable oatmeal consistency is achieved.
Under normal temperatures (70°F / 21°C), Sakrete sets enough for light foot traffic in 24 hours, and reaches full 4,000 PSI structural cure in 28 days.
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Volume: 29.33 cu ft (1.09 cu yds)