Foundation Calculators
Calculate materials for concrete foundation work including anchor bolts, sill seal, and pressure treated plates.
How many anchor bolts do I need? Free calculator for J-bolt & wedge types at standard spacing — includes total count and layout tips.
Sill seal calculator: Estimate foam gasket rolls by foundation perimeter. Free tool for 3.5" & 5.5" widths — prevents air infiltration.
How much pressure treated lumber for sill plates? Instant calculator for 2x4 & 2x6 PT boards — gives linear feet and board count.
How much concrete do I need? Free calculator for slabs, footings & columns — gives cubic metres and bag counts with waste factor.
How much concrete for a slab? Free calculator for garage, patio & driveway slabs — gives cubic metres and bag count for any thickness.
Concrete footing calculator: Estimate cubic metres for continuous & spread footings. Free tool for foundation walls — includes waste factor.
How much concrete for Sonotubes? Free column calculator for 8", 10" & 12" diameter piers — gives cubic metres per column and total.
Concrete steps calculator: How many cubic metres for stairs? Free tool — enter width, rise, run & step count for instant estimate.
How much gravel do I need? Free calculator for any area — cubic metres, tonnes, and cost estimate with 10% wastage factor.
Driveway gravel calculator: Estimate tonnes and cost by type — crushed stone, pea gravel, road base, or limestone screenings with delivery.
Block fill calculator — how much concrete to fill CMU blocks? Free tool for 8", 10" & 12" blocks. Get cubic yards and bag count instantly.
Mortar mix calculator — free tool to estimate bags of mortar for block, brick & stone. Covers Type N, S & M with joint thickness options.
Retaining wall calculator — free tool for block, CMU & stone walls. Get block count, cap blocks, gravel backfill & drainage estimates instantly.
How much rebar do I need? Free calculator for slabs, footings & walls — gives bar count, linear feet, weight in lbs, and 20 ft piece total.
Rebar spacing calculator — free tool to find optimal grid layout by load type. Get bar count, linear feet, and chair supports for any slab.