Area of steel rod = r²
= (D =2 r = r = D/2)
= D²/4
Volume of steel rod
= Area x Length
= D²/4 x 1000
Density of steel = 7850 kg/m^3
Weight of bar per meter = Volume of steel x Density of steel
= D²/4 x 1000 x (7850/1000 x 1000 x 1000)
= 3.14 D²/4 x 7850/(1000 x 1000)
= 0.785 D² x 0.00750
= 0.00616225 x D²
= 0.00616225 / 1 x D² /1
= D² / (1/0.00616225 )
Weight of bar per meter = D² /162.28 .
= D² /162 kg/m
For example - 6 mm steel bar ( Diameter of steel bar in mm )
6² / 162 = 0.22 kg/m
8² / 162 = 0.395 kg/m
10² / 162 = 0.617 kg/m
12² / 162 = 0.88 kg/m
16² / 162 = 1.58 kg/m
20² / 162 = 2.47 kg/m
Keywords - How to calculate unit weight of steel Bar
Derivation of D²/162
Unit weight of steel | calculate weight of steel bar
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Formula for calculating steel weight per meter | D² /162
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