Rebar Lap Splice Length Calculator
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...
Category Concrete
Slabs, footings, columns, stairs, driveways, and everything reinforced with rebar — sized in cubic yards, bags, or ready-mix truck loads. Every calculator here also converts to weight and a cost estimate, so you know what to order and what it costs before you call a supplier.
Concrete Curing Time Calculator
Estimate walk-on, drive-on, and full-strength dates based on your pour date and curing temperature.
Concrete AC Pad Calculator
Size a poured concrete pad for an outdoor AC condenser, heat pump, or mini-split unit.
Concrete Bench Calculator
Estimate concrete for a poured concrete bench seat and its supports.
Concrete Basketball Court Calculator
Estimate concrete for a full court, half court, or custom basketball slab.
Concrete Countertop Calculator
Estimate concrete and weight for a DIY concrete countertop, including sink or cooktop cutouts.
Concrete Generator Pad Calculator
Size a poured concrete pad for a standby or portable backup generator.
Concrete Fire Pit Calculator
Estimate concrete for a round poured or block-style concrete fire pit ring.
Concrete Lintel Calculator
Estimate concrete for a lintel beam spanning a door, window, or other masonry opening.
Concrete Hot Tub Pad Calculator
Size a poured concrete pad strong enough to support a filled hot tub.