Buildculus
Practical home-improvement calculators for DIYers and contractors.
Calculators
-
Concrete Post-Hole Calculator
Calculate concrete for post holes — fence posts, deck footings, mailbox posts. Get bag counts, cubic feet, and cost estimates with waste built in.
-
Concrete Slab Calculator
Calculate concrete bags, yardage, and rebar for any slab. Live diagram, adjustable waste factor, and a complete material list you can take to the store.
Latest articles
-
How Much Concrete for a 10×36 Post Hole? (Bags, Yards, and Cost)
A 10-inch by 36-inch post hole takes about 3 80-lb bags or 0.06 cu yd of concrete. Bag counts, costs, and frost-depth guidance for common sizes.
-
How Much Concrete for a 10×10 Slab?
How much concrete for a 10×10 slab: about 1.2 cubic yards or 62 bags, plus base prep, control joints, curing, and the bagged-vs-ready-mix decision.