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Concrete Calculator for 16x16 Slab (4" Depth)
For a 16' x 16' slab with 4" depth, you need 3.16 cubic yards of ready-mix concrete.
Concrete Slab Estimator
Calculate cubic yards, cubic feet, and 60lb/80lb premixed bags.
Cubic Yards
Cubic Feet
Premix Bags
Step-by-Step Worked Explanation
Volume = 16 x 16 x (4/12) = 85.3 cubic feet.
Cubic Yards = 85.3 / 27 = 3.16 yards.
80lb Bags = 143 bags.
Mathematical FormulaLaTeX Standard
\text{Cubic Yards} = \frac{L \times W \times D}{27}Explanation: Length (ft) times Width (ft) times Depth (ft) divided by 27 cubic feet per cubic yard.
Frequently Asked Questions
How many 80lb bags for a 16x16 slab?
You will need approximately 143 bags of 80lb premixed concrete.
Need a different variation or custom calculation?
Open the full interactive Concrete Calculator tool.