The weight of any stock metal — round bar, square bar, flat bar, hex, tube, or sheet — in aluminum, steel, stainless, brass, copper, titanium, and a dozen more. Imperial or metric, per piece and per lot, with material cost if you know your price. Free, no signup.
Pick a material and stock form, enter the dimensions, get the weight — per piece and per lot.
Round bar — ⌀ 2 in × 12 in long
You just looked up one part's weight. Fabbric stores weight, cost, and supplier for every part — so material cost flows straight into your quotes and BOMs without a lookup.
See how Fabbric works →Every material weight comes from the same two numbers: the volume of the piece and the density of the alloy. Density is a lookup — 6061 aluminum is 0.0975 lb/in³, mild steel 0.284, 304 stainless 0.289 — and the calculator fills it in for you (editable, because certs sometimes disagree). Volume is where mistakes happen, because every stock form hides a different formula: a round bar is π × (D/2)² × L, a hex bar is measured across flats (not corner to corner), and a tube's wall thickness comes off the outside diameter twice. That's why the diagram redraws with your numbers on it — so there's no doubt which dimension you're entering.
Reading stock dimensions right matters more than the math: bar stock is called out by its cross-section then length (⌀2" × 12"), sheet by length × width × thickness, and tube by OD × wall. When a supplier quotes you per pound, weight is your material cost — enter your price and the calculator turns pounds into dollars per piece and per lot.
Weight is usually step one of a bigger question: what will the job cost, and what should you charge? Carry this material cost straight into the Quote Estimator to price the whole job — setup, labor, outside processing, and margin — or build the full assembly cost in the BOM Cost Roll-Up if the material is one line of many.