How to calculate plate, tube and bar weight
Theoretical weight is volume multiplied by density. A carbon steel plate measuring 2 m by 1 m by 10 mm has a volume of 0.02 m³. At 7,850 kg/m³, its calculated weight is 157 kg. Four plates total 628 kg.
Tubes use the outside section minus the inside section. Enter the wall thickness and outside diameter, or the outside width and height for rectangular tubes. Hexagonal and octagonal bar sizes are measured across parallel flats.
Which density should I use?
Library entries identify reference alloys or products, show their sources and allow density edits. For wood, concrete, stone and aggregate entries, supply the density for the actual product, batch and measured condition.
Wood density depends on species and moisture. For sand, gravel and soil, use bulk density in the transport or storage condition you want to estimate.
I, H, U and angle profile weights
Geometric profiles use rectangles with ideal sharp corners. Fillets, corner curves and manufacturing details can change commercial weights. When a manufacturer's linear weight is available, choose Profile by catalog weight and enter its kg/m and length.
Catalog mode calculates directly from entered linear weight and length. It does not derive density or volume.
Material lists and purchase allowances
Net part weight is separate from planned purchase weight. A 10% allowance on 628 kg gives 690.8 kg for purchase. Cost uses the weight including allowance and the entered unit price.
Edit, duplicate or remove items and group purchase weight by material and density. Lists are saved in your browser. JSON backups restore them. CSV records weights in kg and identifies dimension units. Your browser's print dialog can save the report as PDF.