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►German Weight calculations (examples) | | Standard formula: | | | | | Steel tubes 
| example: | tube 55,0 mm x 2,6 mm formula: (55,0-2,6) x 2,6 x π(Pi) x density/1000 = 52,4 x 2,6 x 3,14159 x 0,00785 = 3,36 kg/m | Stainless steel tubes 
| example: | tube 50 mm x 1,5 mm formula: (50-1,5) x 1,5 x π(Pi) x density/1000 = 48,5 x 1,5 x 3,14159 x 0,00795 = 1,817 kg/m | Round bars 
| example: | bar 50 mm diameter formula:(d/2)² x π(Pi) x density/1000 = steel: 25² x 3,14159 x 0,00785 = 15,413 kg/m aluminium: 25² x 3,14159 x 0,00027 = 5,301 kg/m copper: 25² x 3,14159 x 0,00896 = 17,593 kg/m brass: 25² x 3,14159 x 0,0085 = 16,69 kg/m | Hexagonal bars | example: | bar 30 mm across flats (AF) side length a = AF/√3 formula: a² x 3/2 x √3 x density/1000 = steel: 17,32² x 1,5 x 1,732 x 0,00785 = 6,118 kg/m aluminium: 17,32² x 1,5 x 1,732 x 0,0027 = 2,104 kg/m copper: 17,32² x 1,5 x 1,732 x 0,00896 = 6,983 kg/m brass: 17,32² x 1,5 x 1,732 x 0,0085 = 6,625 kg/m | Flat- and square bars | example: | bar 30 mm x 15 mm formula: width x height x density/1000 = steel: 30 x 15 x 0,00785 = 3,533 kg/m aluminium: 30 x 15 x 0,00270 = 1,215 kg/m copper: 30 x 15 x 0,00896 = 4,032kg/m brass: 30 x 15 x 0,0085 = 3,825 kg/m | The above formulas are useful for determination of theoretical weight per meter. The actual weight per meter may differ marginally due to manufacturing conditions. |
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