Concrete & Masonry

Slabs, footings, blocks, mortar and grout.

• Concrete block calculator — How many concrete blocks and bags of mortar for a wall. Coverage is worked out from the real 15-5/8 in block plus your joint width, not a rule of thumb.
• Concrete footing calculator — Cubic yards, bags and rebar for strip footings, pads and round deck piers. The rebar count includes code lap splices — where most estimates fall short.
• Concrete calculator for post holes — How many bags of concrete per fence post, with the post itself subtracted from the hole. Works for 4x4, 6x6 and metal posts, general or fast-setting mix.
• Concrete slab calculator — Work out the cubic yards, bags of concrete mix and total weight for a slab. Enter length, width and thickness, and see whether bagged mix or ready-mix is cheaper.