Theoretical Metal Weight Calculation Formula
How to Calculate stainless steel weight by yourself

Stainless Steel Pipes

Stainless Steel Round Pipes
Formula: (outer diameter – wall thickness) × wall thickness (mm) × length (m) × 0.02491
E.g.: 114mm (outer diameter) × 4mm (wall thickness) × 6m (length)
Calculation: (114-4) × 4 × 6 × 0.02491 = 83.70 (kg)
* For 316, 316L, 310S, 309S, etc., ratio=0.02507

Stainless Steel Rectangle Pipes
Formula: [(edge length + side width) × 2 /3.14- thickness] × thickness (mm) × length (m) × 0.02491
E.g.: 100mm (edge length) × 50mm (side width) × 5mm (thickness) × 6m (long)
Calculation: [(100+50)×2/3.14-5] ×5×6×0.02491=67.66 (kg)

Stainless Steel Square Pipes
Formula: (side width × 4/3.14- thickness) × thickness × length (m) × 0.02491
E.g.: 50mm (side width) × 5mm (thickness) × 6m (long)
Calculation: (50×4/3.14-5) ×5×6×0.02491 = 43.86kg

Stainless Steel Sheets/Plates

Formula: length (m) × width (m) × thickness (mm) × 7.93 
E.g.: 6m (length) × 1.51m (width) × 9.75mm (thickness)
Calculation: 6 × 1.51 × 9.75 × 7.93 = 700.50kg

Stainless Steel Bars

Stainless Steel Round Bars
Formula: Dia(mm)×Dia(mm)×Length(m)×0.00623
E.g.: Φ20mm(Dia.)×6m (Length)
Calculation: 20 × 20 × 6 × 0.00623 = 14.952kg
*For 400 series stainless steel, ratio=0.00609

Stainless Steel Square Bars
Formula: side width (mm) × side width (mm) × length (m) × 0.00793
E.g.: 50mm (side width) × 6m (length)
Calculation: 50 × 50 × 6 × 0.00793 = 118.95 (kg)

Stainless Steel Flat Bars
Formula: side width (mm) × thickness (mm) × length (m) × 0.00793
E.g.: 50mm (side width) × 5.0mm (thickness) × 6m (length)
Calculation: 50 × 5 × 6 × 0.00793 = 11.895 (kg)

Stainless Steel Hexagon Bars
Formula: dia* (mm) × dia* (mm) × length (m) × 0.00686
E.g.: 50mm (diagonal) × 6m (length)
Calculation: 50 × 50 × 6 × 0.00686 = 103.5 (kg)
*dia. means diameter between two adjacent side width.

Stainless Steel Angle Bars

– Stainless Steel Equal-leg Angle Bars
Formula: (side width ×2 – thickness) ×thickness ×length(m) ×0.00793
E.g.: 50mm (side width) ×5mm (thickness) ×6m (length)
Calculation: (50×2-5) ×5×6×0.00793 = 22.60 (kg)

– Stainless Steel Unequal-leg Angle Bars
Formula: (side width + side width – thickness) ×thickness ×length(m) ×0.00793
E.g.: 100mm(side width) × 80mm (side width) × 8 (thickness) × 6m (long)
Calculation: (100+80-8) × 8 × 6 × 0.00793 = 65.47 (kg)

Stainless Steel Wire or Rod Theoretical calculation formula

Stainless Steel Wire or Rod
Formula: Dia(mm)×Dia(mm)×Length(m)×0.00609  (Grade: 410 420 420j2 430 431)

Formula: Dia(mm)×Dia(mm)×Length(m)×0.00623  (Grade: 301 303 304 316 316L 321)

E.g.: 430 Φ0.1mm(Dia.)x10000m (Length)
Calculation: 0.1 × 0.1 × 10000 × 0.00609 = 14.952kg
*For 400 series stainless steel, ratio=0.609

Stainless Steel Wire Rope Theoretical Calculation Formula

Stainless Steel Wire Rope 1*7,1*19,7*7,7*19,7*37 
Formula: Dia(mm)×Dia(mm)×Length(m)×4  Wire Rope Structure (7*7,7*19,7*37)

Formula: Dia(mm)×Dia(mm)×Length(m)×5  Wire Rope Structure(1*7,1*19)

E.g.: 304 7*19  Φ5mm(Dia.)x1000m (Length)
Calculation: 5 × 5 × 1 × 4 = 100kg
*For Weight per kilometre  7×7,7×19,7×37 Ratio:4
*For Weight per kilometre  1×7,1×19 Ratio:5

Aluminum Sheets/Plates Theoretical weight calculation：

Formula: length (m) × width (m) × thickness (mm) × 1.71
E.g.: 6m (length) × 1.5m (width) × 10.0mm (thickness)
Calculation: 6 × 1.5 × 10 × 1.71 = 153.9kg

Aluminum Square/Rectangular Bar Theoretical weight calculation：

Formula: length (m) × width (mm) × width (mm) × 0.0028
E.g.: 6m (length) × 10.0m (width) × 10.0mm (width) 
Calculation: 6 × 10 × 10 × 0.0028 = 1.68 kg

Aluminum Round Bar Theoretical weight calculation：

Formula: length (m) × Diameter (mm) × Diameter (mm) × 0.0022
E.g.: 6m (length) × 10.0m (Diameter) × 10.0mm (Diameter) 
Calculation: 6 × 10 × 10 × 0.0022 = 1.32 kg

Aluminum Pipe/Tube Theoretical weight calculation：

Formula:  OD(mm) x (OD(mm) – T (mm)) × Length(m) × 0.00879
E.g.: 6m (length) × 10.0m (OD) × 1.0mm (Thickness) 
Calculation: 6 × (10 – 1)× 10 × 0.00879 = 4.746 kg

Aluminum Hexagon Bar Theoretical weight calculation：

Formula: dia* (mm) × dia* (mm) × length (m) × 0.00242
E.g.: 50mm (diagonal) × 6m (length)
Calculation: 50 × 50 × 6 × 0.00242 = 36.3 (kg)
*dia. means diameter between two adjacent side width.

Copper Round Bar Theoretical weight calculation：

Formula: length (m) × Diameter (mm) × Diameter (mm) × 0.00698
E.g.: 6m (length) × 10.0m (Diameter) × 10.0mm (Diameter) 
Calculation: 6 × 10 × 10 × 0.00698 = 4.188 kg

Copper Square / Rectangular Bar Theoretical weight calculation：

Formula: length (m) × Width (mm) × Width (mm) × 0.0089
E.g.: 6m (length) × 10.0m (Width) × 10.0mm (Width) 
Calculation: 6 × 10 × 10 × 0.00698 = 5.34 kg

Copper Hexagon Bar Theoretical weight calculation：

Formula: dia* (mm) × dia* (mm) × length (m) × 0.0077
E.g.: 50mm (diagonal) × 6m (length)
Calculation: 50 × 50 × 6 × 0.0077 = 115.5 (kg)
*dia. means diameter between two adjacent side width.

Copper Pipe/Tube Theoretical weight calculation：

Weight = (O.D. – W.T.) * W.T. * 0.02796 * Length

Copper tube is in millimeters (mm), and the length of copper tube in meters (m), the result of weight is KG.

Copper Sheets/Plates Theoretical weight calculation：

Formula: length (m) × width (m) × thickness (mm) × 0.0089
E.g.: 6m (length) × 1.5m (width) × 10.0mm (thickness)
Calculation: 6 × 1.5 × 10 × 8.9 = 801.0 kg

Brass Round Bar Theoretical weight calculation：

Formula (KGS ) = 3.14 X 0.00000785 X ((diameter / 2)X( diameter / 2)) X LENGTH.

Example : CuSn5Pb5Zn5 Copper Bar 62x3000mm Weight One Piece   

Density: 8.8

Calculation: 3.14 * 8.8/1000000 * ((62/2) * ( 62/2)) *1000 mm = 26.55 kg / metre

Brass Sheets/Plates Theoretical weight calculation：

Formula: length (m) × width (m) × thickness (mm) × 0.0085
E.g.: 6m (length) × 1.5m (width) × 10.0mm (thickness)
Calculation: 6 × 1.5 × 10 × 8.5 = 765.0 kg

Brass Pipe/Tube Theoretical weight calculation：

Formula:  OD(mm) x (OD(mm) – T (mm)) × Length(m) × 0.0267
E.g.: 6m (length) × 10.0m (OD) × 1.0mm (Thickness) 
Calculation: 6 × (10 – 1)× 10 × 0.0267 = 14.4 kg

Brass Hexagon Bar Theoretical weight calculation：

Formula: dia* (mm) × dia* (mm) × length (m) × 0.00736
E.g.: 50mm (diagonal) × 6m (length)
Calculation: 50 × 50 × 6 × 0.00736 = 110.4 (kg)
*dia. means diameter between two adjacent side width.