Theoretical Metal Weight Calculation Formula (30 Types of Metals)

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

Then below steel weight calculator and metal weight calculator to calculate the weight of metals in various shapes will be helpful for you.

However, sometimes you may want to learn the weight calculation formula and keep it in your mind, here is it:

Weight (kg) = Sectional Area (mm2) × Length (m) × Density (ρ, g/cm3)× 1/1000

For the metal density, you can also refer to:

From the above two posts, you will find the density of various metals and alloys.

P.S: Among all of the metal weight calculation formula in the following part, there are two kinds of metals that are not mentioned, which are I beam steel and H beam steel.

If you want to know the difference between H beam steel and I beam steel as well as the methods to calculate the weight of H beam steel and I beam steel, you will get the answers from the following two quick links:

Steel Tube weight calculation formula

Steel Pipe

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

Round Steel weight calculation formula

Steel Rod

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

Square Steel weight calculation formula

Square Steel

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

Flat Steel weight calculation formula

Flat Steel

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

Hexagonal Steel weight calculation formula

Hexagonal Steel

• Formula: side-to-side dia.×side-to-side dia.× length(m)×0.0068
• E.g: 50mm(dia.)×6m (length)
• Calculation: 50×50×6×0.0068=102(kg)

Rebar weight calculation formula

Rebar

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

Flat Steel Tube weight calculation formula

Flat Steel Tube

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

Rectangular Steel Tube weight calculation

Rectangular Steel Tube

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

Equal-leg angle steel Steel Tube weight calculation formula

Equal-leg Angle Steel

• Formula: (side width×2-thickness)×thickness×length(m)×0.00785
• E.g: 50mm×50mm×5(thickness)×6m(length)
• Calculation: (50×2-5)×5×6×0.00785=22.37kg

Unequal-leg Angle Steel weight calculation formula

Unequal-leg Angle Steel

• Formula: (side width+side width-thickness)×thickness×length(m)×0.0076
• E.g: 100mm×80mm×8(thickness)×6m(length)
• Calculation: (100+80-8)×8×6×0.0076=62.746kg

Brass Tube weight calculation formula

Brass Pipe

• Formula: (OD-wall thickness)×thickness(mm)×length(m)×0.0267

Copper Tube weight calculation formula

Copper Pipe

• Formula: (OD-wall thickness)×thickness(mm)×length(m)×0.02796

Aluminum Embossed Sheet weight calculation formula

Aluminum Checkered Sheet

• Formula: length(m)×width(mm)×thickness (mm)×0.00296

Brass Plate weight calculation formula

Brass Pipe

• Formula: thickness(mm)×(O.D-thickness)×length(m)×0.0267

Copper Sheet weight calculation formula

Copper Sheet

• Formula: length(m)×width(mm)×thickness(mm)×0.0089

Zinc Plate weight calculation formula

Zinc Plate

• Formula: length(m)×width(mm)×thickness(mm)×0.0072

Lead Plate weight calculation formula

Lead Sheet

• Formula: length(m)×width(mm)×thickness(mm)×0.01137

Octagonal Steel

Octagonal Steel

• Formula: length(m)×across width(mm)×across width(mm)×0.0065

Copper Rod

• Formula: dia.(mm)×dia.(mm)×length(m)×0.00698

Round Brass Rod

Brass Rod

• Formula: dia.(mm)×dia.(mm)×length(m)×0.00668

Round Aluminum Rod

Aluminum Rod

• Formula: dia.(mm)×dia.(mm)×length(m)×0.0022

Square Copper Rod

Square Copper Rod

• Formula: width(mm)×width(mm)×length(m)×0.0089

Square Brass Rod

Square Brass Rod

• Formula: width(mm)×width(mm)×length(m)×0.0085

Square Aluminum Rod

Square Aluminum Rod

• Formula: width(mm)×width(mm)×length(m)×0.0028

Hexagonal Copper Rod

Hexagonal Copper Rod

• Formula: across width(mm)×across width(mm)×length(m)×0.0077

Hexagonal Brass Rod

Hexagonal Brass Rod

• Formula: width(mm)×across width(mm)×length(m)×0.00736

Hexagonal Aluminum Rod

Hexagonal Aluminum Rod

• Formula: across width(mm)×across width(mm)×length(m)×0.00242

Aluminum Plate

Aluminum Plate

• Formula: thickness(mm)×width(mm)×length(m)×0.00171

Round Aluminum Tube

Aluminum Pipe

• Formula: thickness(mm)×(O.D(mm)-thickness(mm))×length(m)×0.00879

You can also download the infographic of the metal weight calculation formula (PDF file) on this page.

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