Skip to contentSiteSpecCalc Length imperial. Weight lb. Currency USD. Weight uses 1 lb = 0.45359237 kg. Currency converts US-dollar planning prices and does not change volumes, counts, or geometry.
Calculators
Five master engines and the cluster hubs that hold the preset jobs. Every number on a page comes from the same functions as the master calculator.
Concrete Slab, Rebar, and Bag Calculator
Size a slab-on-ground, optional turn-down edge, and a rebar mat. Compare bagged concrete with a ready-mix truck before you order.
Wire Size and Voltage Drop Calculator
Check a branch circuit or feeder for ampacity and voltage drop. The diagram is a one-line from the panel, through the conduit, to the load.
Stair Stringer Layout Calculator
Turn a floor-to-floor rise into an equal riser, a total run, a diagonal stringer, and the framing-square settings.
Roof Pitch and Common Rafter Calculator
Measure a gable or shed roof from span, length, pitch, and eave overhang. The truss triangle scales as you move the pitch.
Pallet, Container CBM, and Dimensional Weight Calculator
Lay cartons on a pallet, then pack those pallets on the container floor. The plan shows slots, payload against the planning limit, and billable weight in the selected currency.