Weight | = | Volume x density | |

Since its cylindical shape | |||

Volume of bar | = | pi()*h*(d²)/4 | mm³ |

where | h is height of cylinder bar | ||

d is diameter in mm | |||

Weight density of steel | = | 7850 | kg/m³ |

Here we considering for 1m length, so h = 1m | |||

Volume of bar | = | pi()*h*(d²)*(10⁻⁶)/4 | m³ |

= | pi()/4*h*(d²)*(10⁻⁶) | ||

Here we have coverted dia from mm to m | |||

Volume of bar | = | (7.85*(10⁻⁷))*(d²) | m³ |

Weight of bar | = | Weight density x Volume | |

or unit weight of steel | = | 7850*(7.85*(10⁻⁷))*(d²) | |

= | 0.00616225 | *d² | |

or can be written as | = | d²/ | 162 |

where d is diameter of bar in mm | |||

Example | |||

25mm bar weight per meter = | 25*25/162 | ||

= | 3.858024691 | kg | |

Weight of steel | = | (d²/162)*length |

## Thursday, February 22, 2018

### How to calculate weight of mild steel bar?

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