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Free Online Construction Calculators

Free online construction calculators for tile, paint, concrete, drywall, framing, steel, and more — no sign-up, no paywall. Estimate materials accurately for any small construction or remodel project.

Area Calculators

Tile Calculator

Calculate exact tile quantities for floors, walls, backsplashes, and showers.

Area

Paint Calculator

Estimate paint gallons for walls, ceilings, and trim with multi-coat support.

Area

Drywall Calculator

Calculate drywall sheets, screws, and joint compound for walls and ceilings.

Area

Flooring Calculator

Estimate hardwood, laminate, or vinyl plank flooring with pattern-based waste.

Area

Roofing Calculator

Convert roofing footprint to actual area using pitch and calculate shingle bundles.

Area

Concrete Calculator

Calculate cubic yards and 80lb bags of concrete for slabs, patios, and footings.

Area

Rebar Calculator

Estimate rebar bars and linear feet for reinforced concrete slabs.

Area

ICF Calculator

Calculate ICF blocks and concrete cubic yards for Insulated Concrete Form walls.

Area

Asphalt Calculator

Calculate hot-mix asphalt in cubic yards and tons with compaction adjustment.

Area

Brick / Block Calculator

Brick and block calculator — calculate bricks, mortar, and cement for walls with bond pattern support.

Area

Excavation Calculator

Calculate bank and loose volumes, truck loads, and soil weight for excavation.

Area

Rebar Spacing Calculator

Calculate rebar bars, linear feet, and weight with edge cover and layers.

Area

Linear Calculators

Framing Calculator

Framing calculator: estimate wall studs, plates, and lumber for wood-framed construction.

Linear

Trim / Molding Calculator

Calculate linear trim pieces for baseboard, crown molding, and chair rail.

Linear

Board Feet Calculator

Convert linear footage of lumber into board feet for accurate ordering.

Linear

Steel Weight Calculator

Free online steel weight and bar weight calculator — round bar, rebar, plate, pipe, angle, and square tube. Get weight per foot and total weight by shape and length.

Linear

Pipe Volume Calculator

Calculate pipe internal volume, water capacity in gallons and liters.

Linear

Slope & Grade Calculator

Convert between slope percentage, angle, and ratio for ramps and drainage.

Linear

Stair Calculator

Stair calculator: riser count, tread depth, stringer length, and code compliance.

Linear