Construction / 10 calculators

Concrete & Masonry

Estimate concrete volume, bag counts, reinforcing steel, blocks, mortar, footings, piers, posts, and stairs.

Find slab volume, ready-mix yards, and bag counts from length, width, thickness, and waste.

Convert a concrete volume into 40, 50, 60, or 80 lb bags and 20 or 25 kg bags.

Subtract post displacement to estimate concrete volume and bags for every fence post.

Estimate hole volume, post displacement, gravel base, and concrete bags for round post holes.

Estimate concrete yards and bags for cylindrical forms using diameter, depth, count, and waste.

Estimate concrete and reinforcing steel for continuous or isolated rectangular footings.

Calculate concrete volume for round or rectangular columns with a waste allowance.

Estimate concrete volume for a stair flight from rise, run, width, landing, and waist thickness.

Estimate reinforcing bar count, total length, intersections, and approximate weight for a slab grid.

Estimate standard concrete blocks, mortar bags, and a cut and breakage allowance for a wall.

Common project sizes

Source tables