Theoretical Steel Weight Calculation Formula (2018 Updated)

If you’re working in metalworking industry, even you’re engineers, you will try to find one calculator to help you calculate ms plate weight, gi sheet weight, structural steel weight, ms angle weight, mild steel weight, steel bar weight, square tube weight, angle weight, aluminum weight etc.

However, the weight calculation formula is writen in the calculator by the develpers, you still don’t know whether their formula is correct.

And sometimes, you want to learn the weight calculation formula and remember it in your mind.

In this case, the weight calculator is not suitable for you.

In order to help you quickly find the metal weight formula, I made below infographic which is not only pratical, but also beautiful.

If you want the PDF version of the weight calculation formula, you can save below infographic or bookmark in web browser.

Theoretical steel weight calculation formula

Steel Plate

Steel plate weight calculation formula

  • Formula: 7.85×length (m)×width (m)×thickness (mm)
  • E.g: 6m (length)×1.51m (width)×9.75mm (thickness)
  • Calculation: 7.85×6×1.51×9.75=693.43kg

Steel Tube

Steel Tube weight calculation formula

  • Formula: (OD-Wall thickness)×Wall thickness (mm)×0.02466×length (m)
  • E.g: 114mm(OD)×4mm (Wall thickness) × 6m (length)
  • Calculation: (114-4)×4×0.02466×6=65.102kg

You can also use Tube & Rod Weight Calculator to calculate the weight.

Round Steel

Round Steel weight calculation formula

  • Formula: Dia.mm×Dia.mm×0.00617×length (m)
  • E.g: Φ20mm (Dia.)×6m (length)
  • Calculation: 20×20×0.00617×6=14.808kg

Square Steel

Square Steel weight calculation formula

  • Formula: Edge width (mm)×Edge width (mm)×length (m)×0.00785
  • E.g: 50mm (Edge width)×6m (length)
  • Calculation: 50×50×6×0.00785=117.75(kg)

Flat Steel

Flat Steel weight calculation formula

  • Formula: Edge width (mm)×thickness (mm)×length (m) × 0.00785
  • E.g: 50mm (Edge width) × 5.0mm (thickness)×6m (length)
  • Calculation: 50×5×6×0.00785=11.7.75(kg)

Hexagonal Steel

Hexagonal Steel weight calculation formula

  • Formula: Edge-to-edge Dia.×Edge-to-edge Dia.× length (m)×0.00068
  • E.g: 50mm (Dia.) ×6m (length)
  • Calculation: 50×50×6×0.0068=102(kg)

Rebar

Rebar weight calculation formula

  • Formula: Dia.mm×Dia.mm×0.00617×length (m)
  • E.g: Φ20mm(Dia.)×12m (length)
  • Calculation: 20×20×0.00617×12=29.616kg

Flat Steel Tube

Flat Steel Tube weight calculation formula

  • Formula: (Edge length + Edge width) × 2 × thickness×0.00785×length (m)
  • E.g: 100mm×50mm×5mm (thickness)×6m (length)
  • Calculation: (100+50) × 2×5×0.00785×6=70.65kg

Rectangular Steel Tube

Rectangular Steel Tube weight calculation

  • Formula: Edgewidthmm×4×thickness×0.00785×length(m)
  • E.g: 50mm×5mm (thickness)×6m (length)
  • Calculation: 50×4×5×0.00785×6=47.1kg

Equal-leg angle Steel

Equal-leg angle steel Steel Tube weight calculation formula

  • Formula: Edge width (mm)×thickness×0.015×length (m)
  • E.g:  50mm×50mm×5 thickness×6m(length)
  • Calculation: 50×5×0.015×6=22.5kg

Unequal-leg Angle Steel

Unequal-leg Angle Steel weight calculation formula

  • Formula: (Edge width+Edge width) × thickness×0.0076×lengthm
  • E.g: 100mm×80mm×8 thickness×6m(length)
  • Calculation: (100+80) × 8×0.0076×6=65.67kg

Other nonferrous metals

Brass Tube

Brass Tube weight calculation formula

  • Formula: (OD-Wall thickness) × thickness×0.0267×lengthm
  • E.g: 20mm×1.5mm (thickness)×6m(length)
  • Calculation: (20-1.5) × 1.5×0.0267×6=4.446kg

Copper Tube

Copper Tube weight calculation formula

  • Formula: (OD-Wall thickness) × thickness×0.02796×length (m)
  • E.g: 20mm×1.5mm (thickness)×6m(length)
  • Calculation: (20-1.5) ×1.5×0.02796×6=4.655kg

Aluminum Embossed Sheet

Aluminum Embossed Sheet weight calculation formula

  • Formula: length (m)×width (m)×thickness (mm)×2.96
  • E.g: 1m width×3m length×2.5mm thickness
  • Calculation: 1×3×2.5×2.96=22.2kg
Brass Plate weight calculation formula

Brass Plate

Ratio: 8.5

Copper Sheet weight calculation formula

Copper Sheet

Ratio: 8.9

Zinc Plate weight calculation formula

Zinc Plate

Ratio: 7.2

Lead Plate weight calculation formula

Lead Plate

Ratio: 11.37

Calculation Method: ratio × thickness = weight / ㎡

2018-01-25T15:32:16+00:00

3 Comments

  1. lekh2003 January 3, 2018 at 4:00 pm - Reply

    These formulas are correct. The formulas are easily derived through the equation m=pv

    “m” is the mass of the object.
    V is what you have to calculate as the volume.
    p is the density.

    The website is simplifying this formula into situation specific equations which can be derived from common variables you might know.

  2. AN February 1, 2018 at 3:01 pm - Reply

    You say: “If you want the PDF version of the weight calculation, you can save below infographic or bookmark in web browser.”
    everything on this page is protected so no possibility to save or copy anything from it…

    • MachineMfg February 1, 2018 at 7:28 pm - Reply

      in order to protect it, we limit the downloads. However, you can save the bookmark in your browser for future convenience checking.

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