Building Material Calculators
Turn measured surfaces and runs into countable purchase units without hiding product coverage.
Building materials
26 focused quantity tools
- Rebar CalculatorCalculate rebar linear feet and bar runs from slab dimensions, spacing and lap allowance.
- Paint CalculatorEstimate paint for room walls, one wall, a ceiling or known area using coats and product coverage.
- Tile CalculatorEstimate whole tiles from area, tile dimensions, grout joint and a cut or breakage allowance.
- Flooring CalculatorCalculate whole flooring boxes from room area, carton coverage and a cuts allowance.
- Drywall CalculatorEstimate drywall sheets from wall area, openings, sheet size and a cut allowance.
- Insulation CalculatorEstimate insulation batts from net wall area, batt dimensions, openings and a cut allowance.
- Roofing Shingle CalculatorEstimate sloped roof area, roofing squares and bundles from footprint, pitch and product coverage.
- Siding CalculatorEstimate siding pieces from net wall area, exposed face width, stock length and cuts.
- Decking CalculatorEstimate deck boards from surface area, actual board width, gap, stock length and cuts.
- Fence CalculatorCalculate fence posts and sections from run length, maximum spacing and layout extras.
- Board Foot CalculatorCalculate total board feet from nominal thickness, nominal width, length and piece count.
- Lumber CalculatorEstimate lumber purchase units from project area and editable board coverage.
- Stud CalculatorEstimate wall studs from wall run, on-center spacing, levels and allowance.
- Plywood CalculatorEstimate whole plywood sheets from area and actual sheet coverage.
- OSB CalculatorEstimate whole OSB sheets from wall, roof or floor area.
- Blown-In Insulation CalculatorEstimate blown-in insulation bags using the product coverage for the selected target depth.
- Rigid Foam Board CalculatorEstimate whole rigid-foam boards from insulated area and board coverage.
- Metal Roofing CalculatorEstimate metal roof panel count from eave length, slope length and panel coverage width.
- Roofing Underlayment CalculatorEstimate underlayment rolls from actual roof-plane area and net roll coverage.
- House Wrap CalculatorEstimate house-wrap rolls from exterior wall area and product roll coverage.
- Primer CalculatorEstimate primer purchase units from surface area, coverage and allowance.
- Tile Grout CalculatorEstimate grout bags from tiled area and editable product coverage.
- Thinset CalculatorEstimate thinset mortar bags from tile area and product-specific coverage.
- Carpet CalculatorEstimate carpet purchase units from floor area and editable roll-cut coverage.
- Deck Joist CalculatorEstimate deck joist count and total linear footage from deck width, joist length and spacing.
- Gutter CalculatorEstimate gutter sections and downspouts from measured eave runs.
Use the measured quantity first
Start with the drawing or a defensible site measurement. Keep geometry separate from product coverage, compaction, cuts and purchase rounding so each decision stays visible.
These tools estimate quantities. They do not choose structural sizes, verify code compliance or replace a manufacturer installation specification.