BBS/Estimation

how to calculate steel weight in kg

How to calculate steel weight in kg

How to calculate steel weight in kg

To calculate the weight of steel, you can use the following formula:

How to calculate steel weight in kg

Formula:

Weight (kg)=Volume (m³)×Density (kg/m³) 

Steps to calculate steel weight:

  1. Calculate the volume of the steel:

    For a solid steel bar:

    Volume (m³)=Length (m)×Cross-sectional Area (m²)

    For a hollow steel pipe:

    Volume (m³)=π×[(Outer Radius (m)2−Inner Radius (m)2)×Length (m)]

  2. Use the density of steel:

    The density of steel is approximately 7850 kg/m³

  3. Calculate the weight:

Multiply the volume by the density of steel:

Weight (kg)=Volume (m³)×7850

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Example for a solid steel bar:

  • Length: 2 meters
  • Diameter: 10 cm (0.1 m)
  1. Cross-sectional area (for a circular section)

    A=π×(d2)2

    A=π×(0.12)2=0.00785 m² 

  2. Volume:

    V= Length × A=2×0.00785=0.0157 m³

  3. Weight:

    W=V×7850=0.0157×7850=123.745 kg

So, the weight of the steel bar would be approximately 123.75 kg.

If you have specific dimensions or a different shape of steel, you can follow similar steps and adjust the calculations accordingly.


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