Materials Calculators
Weigh and specify stock: the weight of bar, tube, plate and angle in any of 40+ cited materials (weight = density × cross-section × length), plus material-density, hardness-conversion and steel-pipe-schedule reference tables.
Metal Weight
Weight of bar, tube, plate or angle in any metal — with weight-per-length and cross-section area.
Thermal Expansion
Linear thermal growth or shrinkage from material coefficient, length and temperature change.
Board Feet
Lumber board feet, waste allowance and cost from thickness, width, length and quantity.
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This cluster sizes raw stock the way a fabricator or estimator actually orders it. The metal weight calculator applies W = ρ · A · L — density times cross-section area times length — and resolves the area for the shape you pick: a round bar is A = π/4·d², a tube A = π/4·(OD²−ID²), with plate, square bar, hex and angle handled the same way. It returns total weight, weight each, weight per metre or foot, and the cross-section area itself, in metric or imperial, so you can price a cut, check a crate against a forklift rating, or convert a drawing call-out into a real number.
For lumber estimating, the board feet calculator uses BF = thickness(in) × width(in) × length(ft) / 12, then applies quantity, waste allowance and price per board foot. It pairs naturally with the rafter calculator, which estimates common-rafter cut length and count before you turn that layout into a lumber takeoff. Board feet remains intentionally a material tally, not a span or structural design result.
Densities aren't guessed. Every metal value traces to the cited material density chart covering 40+ engineering metals and alloys, and the steel pipe schedule chart gives wall thickness by NPS and schedule for accurate tube weights.
Unlike the supplier calculators that dominate this search — built to funnel you toward a stock quote — MachineCalcs sells nothing. The shape math, the density source and the formula are all on the page, explained in the metal weight formula guide, so machinists, estimators and design engineers can verify the figure instead of trusting it.