CONCRETE BAG FORMULA
V / 27 = CY × 45 = BAGS
1 cubic yard ≈ 45 bags (80lb). Standard calculation for residential slabs and footings.
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WHY USE THIS CONCRETE CALCULATOR?
Quickly estimate concrete needs
Helps reduce ordering mistakes
Useful for slabs, footings, posts, and walls
Great for contractors and DIY projects
Saves time during project planning
CONCRETE CALCULATOR FAQ
HOW DO I CALCULATE HOW MUCH CONCRETE I NEED?
To calculate concrete volume, measure the length, width, and depth (thickness) of your pour. Multiply these three dimensions to get total cubic feet, then divide by 27 to convert to cubic yards.
HOW MANY CUBIC YARDS OF CONCRETE DO I NEED FOR A SLAB?
A typical 10' x 10' slab at 4 inches thick requires approximately 1.23 cubic yards. Our calculator automates this math for any slab size you enter.
WHAT FEATURES ARE INCLUDED IN THE FULL VERSION?
The full version unlocks slab, footing, post hole, and wall calculations, circular pours, bag counts (80lb, 60lb, 40lb), waste factor adjustments, and professional contractor estimating tools.