Concrete Calculator
Slab volume plus bag estimates for small pours.
Depth unit
Volume (cu ft)
36.67
Before waste: 33.33
Volume (cu yd)
1.358
60 lb bags (~0.45 cu ft)
82
80 lb bags (~0.6 cu ft)
62
What is this tool?
Slab volume is length × width × depth. Convert to cubic yards (27 cu ft = 1 cu yd) for ready-mix, or estimate bag counts using typical bag yields (~0.45 cu ft for 60 lb, ~0.60 cu ft for 80 lb — brands differ). Always confirm bag yield on the package.
How to use it
- Enter slab length, width, and depth.
- Read cubic feet/yards and approximate bag counts.
- Add waste and verify bag yield before purchase.
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