Tools

Calculate how much concrete a parking lot slab needs from area and thickness. Get cubic yards, truck loads, gravel base tonnage, and cost.

Calculate how many cubic yards of concrete you need for a slab. Enter length, width, and thickness to get yardage, bag counts, and an optional cost estimate.

Size a complete slab-on-grade pour in one place: concrete volume, gravel sub-base, rebar grid and total weight. Enter the slab dimensions and the tool...

Find the exact weight of any rebar size by length and quantity, using ASTM A615 standard values. Get total pounds, tons, linear feet and the number of...

Enter your slab size and on-center spacing to get the exact number of bars each way, total linear feet, 20-ft sticks to order, tie count and steel weight....

Work out how far two rebars must overlap where they join. Uses the standard field rule — 40 bar diameters for tension, 30 for compression — with a Grade...

Estimate walk-on, drive-on, and full-strength dates based on your pour date and curing temperature.

Size a poured concrete pad for an outdoor AC condenser, heat pump, or mini-split unit.