Concrete Calculator
Calculate cubic yards of concrete and number of bags needed for slabs and footings
Pouring a patio or walkway? This calculator determines the volume of concrete required in cubic yards (for ordering a truck) or the number of pre-mix bags needed (for DIY projects).
Calculator Inputs
ft or m
ft or m
inches or cm
Results
Enter values above to see your results
How It Works
We calculate the volume (Length × Width × Depth) and convert it to Cubic Yards or Cubic Meters. We also provide bag counts for standard sizes.
Tips & Best Practices
- •A standard patio slab is 4 inches thick.
- •Driveways usually require 5-6 inches of thickness.
- •Order 5-10% extra to account for spillage and uneven subgrade.
Frequently Asked Questions
How many bags equal a cubic yard?
It takes approximately 45 bags of 80lb concrete or 60 bags of 60lb concrete to make one cubic yard.
Guides & Articles
The Ultimate DIY Concrete Guide: Math, Mixes, and Mistakes
Concrete is expensive and unforgiving. Learn how to calculate cubic yards, handle slab depth variances, and avoid the dreaded 'cold joint'.
Stop Buying Too Much Concrete: A Guide to Estimating
Learn how to calculate exactly how much concrete you need for your patio or driveway without wasting money on leftovers or coming up short.
Home Renovation Estimating: Paint, Tile, and Wallpaper Math
Renovations always go over budget. Why? Poor estimating. Learn how to calculate material needs including waste factors and pattern repeats.
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