This guide provides commonly used formulas for calculating the theoretical weight of different metal materials. The formulas apply to stainless steel, carbon steel, copper, brass, aluminum and various geometric types including pipes, tubes, plates, bars and profiles. Unless otherwise noted, length is measured in meters, area in square meters, and all other dimensions in millimeters.
Stainless Steel Pipe Weight Calculation
Weight (kg) = (Outer Diameter − Wall Thickness) × Wall Thickness × 0.02491 × Length (m)
Stainless Steel Square Tube Weight Calculation
[(Side Length × 4 ÷ 3.14) − Wall Thickness] × Wall Thickness × 0.0246615
Stainless Steel Rectangular Tube Weight Calculation
[(Length + Width) × 2 ÷ 3.14 − Wall Thickness] × Wall Thickness × 0.0246615
Stainless Steel Plate/Strip Weight Calculation
Weight (kg) = Length (m) × Width (m) × Thickness (mm) × Density
Stainless Steel Round Bar Weight Calculation
Weight (kg) = Diameter (mm) × Diameter (mm) × Length (m) × Density
Stainless Steel Square Bar Weight Calculation
Weight (kg) = Side Width (mm) × Side Width (mm) × Length (m) × 0.00793
Round Steel Weight Calculation
Weight (kg) = 0.00617 × Diameter × Diameter × Length
Square Steel Weight Calculation
Weight (kg) = 0.00785 × Side Width × Side Width × Length
Hex Steel Weight Calculation
Weight (kg) = 0.0068 × Across-Flat Width × Across-Flat Width × Length
Octagonal Steel Weight Calculation
Weight (kg) = 0.0065 × Across-Flat Width × Across-Flat Width × Length
Rebar Weight Calculation
Weight (kg) = 0.00617 × Calculated Diameter × Calculated Diameter × Length
Angle Steel Weight Calculation
Weight (kg) = 0.00785 × (Side Width + Side Width − Side Thickness) × Side Thickness × Length
Flat Steel Weight Calculation
Weight (kg) = 0.00785 × Thickness × Side Width × Length
Steel Pipe Weight Calculation
Weight (kg) = 0.02466 × Wall Thickness × (Outer Diameter − Wall Thickness) × Length
Steel Plate Weight Calculation
Weight (kg) = 7.85 × Thickness × Area
Round Copper Bar Weight Calculation
Weight (kg) = 0.00698 × Diameter × Diameter × Length
Round Brass Bar Weight Calculation
Weight (kg) = 0.00668 × Diameter × Diameter × Length
Round Aluminum Bar Weight Calculation
Weight (kg) = 0.0022 × Diameter × Diameter × Length
Square Copper Bar Weight Calculation
Weight (kg) = 0.0089 × Side Width × Side Width × Length
Square Brass Bar Weight Calculation
Weight (kg) = 0.0085 × Side Width × Side Width × Length
Square Aluminum Bar Weight Calculation
Weight (kg) = 0.0028 × Side Width × Side Width × Length
Hex Copper Bar Weight Calculation
Weight (kg) = 0.0077 × Across-Flat Width × Across-Flat Width × Length
Hex Brass Bar Weight Calculation
Weight (kg) = 0.00736 × Across-Flat Width × Across-Flat Width × Length
Hex Aluminum Bar Weight Calculation
Weight (kg) = 0.00242 × Across-Flat Width × Across-Flat Width × Length
Copper Plate Weight Calculation
Weight (kg) = 0.0089 × Thickness × Width × Length
Brass Plate Weight Calculation
Weight (kg) = 0.0085 × Thickness × Width × Length
Aluminum Plate Weight Calculation
Weight (kg) = 0.00171 × Thickness × Width × Length
Round Copper Tube Weight Calculation
Weight (kg) = 0.028 × Wall Thickness × (Outer Diameter − Wall Thickness) × Length
Round Brass Tube Weight Calculation
Weight (kg) = 0.0267 × Wall Thickness × (Outer Diameter − Wall Thickness) × Length
Round Aluminum Tube Weight Calculation
Weight (kg) = 0.00879 × Wall Thickness × (Outer Diameter − Wall Thickness) × Length
Note: In these formulas, the unit of length is meters, the unit of area is square meters, and all other units are in millimeters.
