Metal Weight Calculator

Approx. weight in kg*
Approx. weight in lbs*
*These weights should be used for estimation purposes only. Plate weight does not allow for kerf.

Metal Weight Calculator is a simple calculator that calculates the weight of different metals. This calculator is useful to many businesses related to the metal industry.

How Weight Calculator Works:

  • Select metal type.
  • Select shape of metal. (E.g. flat bar, sheet plate, ring, round bar, square, hexagon bar, round tubing, square tubing etc.)
  • Enter number of pieces.
  • Enter dimensions. (diameter and length)
  • Click on the Calculate button.

Formula to calculate weight of a metal varies according to metal shape, dimensions of metal piece and number of pieces.
After clicking on the Calculate button, the weight of metal is calculated immediately.

Online Metal Weight Calculator

This is a very handy calculator and you can customize it as per metal type, metal shape, and the number of pieces. You can choose among different types of metals like Carbon Steel, Aluminum, Zinc, Copper, Brass, Tungsten, etc.

Steel is a metal which is an allotropic form of Iron with some alloy elements especially carbon and other materials.  Iron is extracted from the Iron ore with the help of various methods and steel is obtained after adding some alloy such as carbon into the extracted Iron which will provide high tensile strength to it. Steel is used in many industries and has many applications due to its low cost and higher strength properties.

Iron & Iron ore

Iron is commonly found deep inside the earth’s crust but it is not pure. There are a lot of impurities in it. It is in the form of ore such as iron oxide also called hematite ore, magnetite ore, etc. Iron is a metal that is extracted by melting the iron ore with the help of coal into the blast furnace. The molten iron is then cast into the iron products. The pure Iron is very soft and ductile in nature due to the less compact crystal structure of iron. But it can be made brittle by adding some alloy materials to it.

Steel production

Steel is an allotropic form of iron. Due to adding carbon content, iron becomes strong and steel is made. Steel is produced by heating the iron ore in a blast furnace at a very high temperature. This process is called a smelting process. In this process, an iron ore gets converted into a molten state but it still contains impurities. So, in order to remove those impurities limestone is added while smelting. Limestone converts the unwanted impurities into a waste slag which can be removed easily and we can get molten iron. In smelting, the iron oxide has a lot of oxygen content in it. Carbon is added to reduce the iron oxide and releases carbon dioxide into the atmosphere. Due to this, the iron becomes an Iron-carbon alloy which is called as steel. Depending upon the carbon content, steel is classified into various types –

There are basically four types of steel
a) Carbon Steel
b) Alloy Steel
c) Stainless Steel
d) Tool Steel

These four types differ in many aspects such as its physical properties, its chemical composition, corrosion resistance, environment properties etc. Depending upon the application where will be used, one has to select the appropriate material for steel.

There are many grades of steel which are classified according to their properties. There are two major type of numbering systems used for differentiating the grades, the first is the American Iron & Steel Institute (AISI), and the second is the Society of Automotive Engineers (SAE). In both the standards there are four number whuch represent the type of steel. 1st letter indicate the designation for carbon steel and it is always represented by (1) for eg – 1XXX, AISI 1020. in case of alloy steel the first letter would indicate from 2-9 depending upon which alloy material has beed used, for eg – 2XXX for nickel, 3XXX for nickel chromium steel, 5XXX for chromium steel etc. The 2nd digit of the grade numbering indicate the percentage of that alloy in steel, for eg – 1 for 1%, 2 for 2%. The 3rd and 4th digit of the numbering series indicates the carbon concentration in the steel in percentage. For eg – 20 means 0.20 percentage carbon content, 40 means 0.40 percentage of carbon.

These standards are used to easily describe the exact material and its chemical and physical composition. For eg – 1) AISI1020 is a plain low carbon steel which is also known as mild steel which has 0.20% of carbon content. 2) AISI4340 is a  molybdenum steel containing about 3% of molybdenum and 0.40% of carbon content.

Based on the carbon content in steel they are classified into three types –

  • Low carbon steel – it is also called as mild steel with a carbon content of 0.1% to 0.3% weight with other alloying material such as manganese 0.4 %. Some examples of low carbon steel are AISI1018, AISI1020, etc.
  • Medium carbon steel – these have carbon content of 0.2-0.4% weight. They have better tensile strength as compared to low carbon steel. Some examples of medium carbon steel are AISI1045, AISI1137, AISI1144, etc.
  • High carbon steel – these are heat-treated, annealed and have a high carbon content at around 0.5% – 0.8% weight. Some examples of high carbon steel are AISI1060, AISI1070, AISI1080 etc

Depending upon the carbon content in the steel, there different grades of steel with different properties. More the carbon content, the more is the tensile strength. Some high strength steels undergo different processes such as annealing, quenching, tempering, hardening, etc. These make the steel strong enough to be used in heavy-duty applications such as infrastructure, buildings, ships, heavy-duty machinery etc.

METAL WEIGHT CALCULATOR

From the above context, we have understood about steel and its manufacturing process with the properties of steel. Now we will know about the weight of different materials of steel including mild steel, structural steel, high strength steel etc which are most commonly used in the industry. For any Engineering industry, the overall weight of the machine is an important factor in which an Engineer looks upon it. To choose an appropriate material with proper weight, we need to understand how the weight varies by different materials of different shapes.

Metal weight according to the shape of an object

The basic formula for calculating the weight is:

Density (kg/m3) = mass (kg)  / volume (m3)
Mass  = density x volume
M = p x V
For a specific material,  density is always the same but the volume would change depending upon the shape of the object.

The most commonly used material for industrial purposes is Mild Steel. This material is used in light duty engineering purposes. So we will understand the weight for Mild Steel material for the following type of shapes which are used in industry and are easily available in the market.

1) Round Bar

metal weight calculator - round bar

Volume of a round bar = Cross sectional area x length of the bar
V = A x L
Let us consider a round bar of length 1m with a diameter of 20mm = 0.020m
So, the radius = 0.020/2 = 0.010m
Cross sectional area of round bar = A = πr2 = π x (0.0102) = 0.0003142m2
Density of mild steel = 7900 kg/m3

Therefore, the mass of round bar = density x cross-sectional area x length of rod
= 7900 x 0.0003142 x 1 = 2.4821 kg

similarly, we can calculate the mass of the round bar of different dimensions.

2) Rectangular bar

metal weight calculator - rectangular bar

Volume of a rectangular bar = length x breadth x height
V = L x B x H
Let us consider a rectangular bar of length 1m, breadth 20mm = 0.020m and height 10mm = 0.010m
Hence, Volume = L x B x H = 1 x 0.020 x 0.010 = 0.0002m3
So, mass of rectangular bar = density x volume = 7900 x 0.0002 = 1.58 kg

Similarly, we can calculate the mass of a rectangular bar of different dimensions.

3) Square Bar

metal weight calculator - square bar

Volume of square bar = cross sectional area x length
= (side)2 x length
Let us consider a rectangular bar of length 1m, side length 20mm = 0.020m
Hence, Volume = (0.020)2 x 0.0004 m3
So, the mass of square bar = density x volume = 7900 x 0.0004 = 3.16 kg

Similarly, we can calculate the mass of a square bar of different dimensions.

4) Hexagonal Rod

metal weight calculator - hexagonal bar

The same formula will be applied here to calculate.
Volume = cross sectional area x Length
To calculate the cross sectional area of hexagonal rod , we first need to know the side length of the hexagonal rod.
Area= (3√(3 ))/2 S2
Where S = side length of the hexagonal rod.
Let us consider a 1 m long hexagonal rod of side length, S = 10 mm = 0.010m
So, volume of the hexagonal rod = V = (3√(3 ))/2 x (0.010)2 x 1=0.0002598 m3

Hence, mass of hexagonal rod = density x volume = 7900 x 0.0002598 = 2.0524 kg.
By using this formula we can calculate the mass of hexagonal rod of different dimensions.

5) Triangular Rod

metal weight calculator - triangular bar

For calculating the area of a triangular bar you should know the lengths of all three sides of edge
Let a,b,c be the lengths of the sides of a triangle.

The area is given by A= √(s(s-a)(s-b)(s-c) )
Where, s = (a+b+c)/2
Let us consider a 1m long triangular bar with side egde length a = 40mm, b = 20mm, c= 30mm

So, s = (40+20+30)/2 = 45 mm
Cross sectional area of triangular bar becomes,
A = √(45(45-40)(45-20)(45-30) ) = 290.47mm= 0.0002905 m2
Hence volume of the triangular bar = Area x length = 0.0002905 x 1 = 0.0002905 m3

Therefore, mass of the triangular bar = density x volume = 7900 x 0.0002905 =2.295 kg.
By using these formula we can calculate the mass of triangular bar of different dimensions.

6) Round Pipe

metal weight calculator - round pipe

The calculations are similar to the round bar. The only difference is that this is a hollow round pipe and round bar is not hollow.

This pipe is better than the round bar because it provides more strength and has less weigh as compared to the round bar.

To calculate the mass,  we must know the outer diameter and the inner diameter or thickness of the hollow round pipe.

Volume of the round = Sectional area x length

V= π ( R2 – r2 ) x L

Let us consider a 1m long round pipe of outer diameter, D = 60 mm and inner diameter, d = 50 mm. so the outer radius becomes, R = D/2 = 60/2 = 30 mm= 0.030 m and inner radius, r = d/2 = 50/2 = 25 mm = 0.025 m

Hence the volume, V = π (0.0302– 0.0252 ) x 1 =0.0008639 m3
Therefore, mass of round pipe = density x volume = 7900 x 0.0008639 = 6.8248 kg
In this way, you can calculate the mass of any round pipe which is hollow.

7) Square Pipe

metal weight calculator - square pipe

It is similar to the round pipe.
Volume of the square pipe = cross sectional area x Length
V= A x L = (a21 – a22)x L
Where a1 is outer edge width and a2 is inner edge width
Let us consider a 1m long square pipe of  outer width  20 mm = 0.020 m and inner width 16 mm = 0.016 m
So, Volume of the square pipe = (0.02022 – 0.01622) x 1 = 0.000144 m3
Hence, mass of the square pipe = density x volume = 7900 x 0.000144 = 1.1376 kg
By using this formula we can calculate the mass of square pipe of different dimensions.

8) Triangular Pipe

metal weight calculator - triangular pipe

For calculating the area of a triangular pipe you should know the lengths of all three sides of both outer edge and inner edge.
Let a,b,c be the lengths of the sides of a outer edge triangle and d, e, f be the length of the sides of inner edge triangle
The area is given by A = √(s(s-a)(s-b)(s-c))
Where, s = (a+b+c)/2

Let us consider a 1m long triangular pipe with side edge length a = 40mm, b = 20mm, c= 30mm

So, s = (40+20+30)/2 = 45 mm
A1= √(45(45-40) (45-20) (45-30)) = 290.47 mm= 0.0002905 m2
Let inner edge sides d = 35 , e = 15  , f =  25
A2= √(37.5(37.5-35) (37.5-15) (37.5-25)) = 162.38 mm2 = 0.0001624 m2
Cross sectional area of triangular pipe  becomes,

A = A1 – A2 = 0.0002905 – 0.0001624 =0.000128 m2

Hence volume of the triangular pipe  = Area x length = 0.000128 x 1 = 0.000128 m3
Therefore, mass of the triangular pipe  = density x volume =7900 x 0.000128=1.0112  kg.
By using this formula we can calculate the mass of triangular pipe of different dimensions.

9) Rectangular Pipe

metal weight calculator -

Volume of the rectangular pipe = cross sectional area x Length
V = A × L = ( ( X1 × Y1 ) – ( x2 × y2 ) ) × L
Where X1 is outer edge width, Y1 is outer edge height and x2 is inner edge width, y2 is inner edge height.

Let us consider a 1m long rectangular pipe of outer edge width 30mm = 0.030m, outer edge height = 25 mm =  0.025 m  and inner edge width 20 mm = 0.020 m , inner edge height = 15 mm = 0.015 m.

So, Volume of the rectangular pipe = [ (0.030 × 0.020 ) – ( 0.025 × 0.015 ) ] × 1 = 0.000225 m3
Hence, mass of the rectangular pipe = density × volume = 7900 × 0.000225 = 1.7775 kg
By using this formula we can calculate the mass of rectangular pipe of different dimensions.

10) Flat Plate

metal weight calculator - flat plate

Volume of a flat plate = length × breadth × thickness
V = L × B × t
Let us consider a flat plate of length 500 mm = 0.5 m , breadth 200 mm = 0.200 m and thickness 2 mm = 0.002 m
Hence, Volume of a flat plate = L × B × t = 0.5 × 0.200 × 0.002 = 0.0002 m3
So, mass of flat plate = density × volume = 7900 × 0.0002 = 1.58 kg
Similarly, we can calculate the mass of rectangular bar of different dimensions.

11) Equal length L section beam

metal weight calculator - equal lenght L section beam

Here, we will have to know the outer and inner edge dimensions.
Volume of the L section = cross sectional area × Length
V= A x L = (( X1 × Y1 ) – (x2 × y2 )) × L
Where X1 is outer edge width, Y1 is outer edge height and x2 is inner edge width, y2 is inner edge height.
Let us consider a 1 m long L section of outer edge width 30mm = 0.030m, outer edge height = 30 mm =  0.030 m  and inner edge width 25 mm = 0.025 m , inner edge height = 25 mm = 0.025 m.
So, Volume of the L section = [ (0.030 × 0.030) – (0.025 × 0.025) ] × 1 = 0.000275 m3
Hence, mass of the L section = density × volume = 7900 × 0.000275 = 2.1725 kg
By using this formula we can calculate the mass of equal length L – section beam of different dimensions.

12) Unequal length L section beam 

metal weight calculator - unequal L section beam

Here, we will have to know the outer and inner edge dimensions.
Volume of the unequal L section = cross sectional area x Length

Where X1 is outer edge width, Y1 is outer edge height and x2 is inner edge width, y2 is inner edge height.
Let us consider a 1 m long unequal L section of outer edge width 60 mm = 0.060 m, outer edge height = 30 mm =  0.030 m  and inner edge width 55 mm = 0.055 m , inner edge height = 25 mm = 0.025 m.
So, Volume of the L section = [ ( 0.060 × 0.030 ) – ( 0.055 × 0.025 ) ] × 1 = 0.000425 m3

Hence, mass of the L section = density × volume = 7900 × 0.000425 = 3.3575 kg
In this way we can calculate the weight of unequal length L – section beam

13) U – section beam

metal weight calculator - U section beam

We can calculate the weight of this U – section in the same way as we calculated for L section
Here, we will have to know the outer and inner edge dimensions.
Volume of the U section = cross sectional area × Length
V = A × L = (( X1 × Y1 ) – ( x2 × y2 )) × L
Where X1 is outer edge width, Y1 is outer edge height and x2 is inner edge width, y2 is inner edge height.
Let us consider a 1 m long U section of outer edge width 30mm = 0.030m, outer edge height = 20 mm = 0.020 m and inner edge width 20 mm = 0.020 m, inner edge height = 15 mm = 0.015 m.

So, Volume of the U section = [ ( 0.030 × 0.020 ) – ( 0.020 × 0.015 ) ] x 1 = 0.0003 m3
Hence, mass of the U section = density × volume = 7900 × 0.0003 = 2.37 kg
By using this formula we can calculate the mass of u section beam of different dimensions.

14) I section beam

metal weight calculator - i section beam

We can calculate the weight of this I – section in the same way as we calculated for U – section
Here, we will have to know the outer and inner edge dimensions.
Volume of the I – section = cross sectional area × Length
V = A × L = (( X1 × Y1 ) – 2 × ( x2 × y2 )) × L

Where X1 is outer edge width, Y1 is outer edge height and x2 is inner edge width, y2 is inner edge height.
Let us consider a 1 m long I – section of outer edge width 60mm = 0.060m, outer edge height = 80 mm = 0.080 m  and inner edge width 25 mm = 0.025 m , inner edge height = 40 mm = 0.040 m.
So, Volume of the I section = [ (0.060 × 0.080) – 2 × (0.025 × 0.040) ] × 1 = 0.0028 m3
Hence, mass of the I section = density × volume = 7900 × 0.0028 = 22.12 kg
In this way we can calculate the mass of an I section with different dimensions.

15) T section beam

t section beam - metal weight calculator

We can calculate the weight of this T – section in the same way as we calculated for I – section
Here, we will have to know the outer and inner edge dimensions.
Volume of the T – section = cross sectional area × Length
Where X1 is outer edge width, Y1 is outer edge height and x2 is inner edge width, y2 is inner edge height.

Let us consider a 1 m long T – section of  outer edge width 80 mm = 0.080 m, outer edge height = 80 mm =  0.080 m  and inner edge width 35 mm = 0.035 m , inner edge height = 70 mm = 0.070 m.

So, Volume of the T -section = [ ( 0.080 × 0.080 ) – 2 × ( 0.035 x 0.070 ) ] × 1 = 0.0015 m3 Hence, mass of the T section = density × volume = 7900 × 0.0015 = 11.85 kg
In this way we can calculate the mass of an T section with different dimensions.

16) Hexagonal Pipe

hexagonal pipe - metal weight calculator

The same formula will be applied here to calculate.
Volume = cross sectional area × Length
To calculate the cross sectional area of hexagonal pipe. we first need to know the side length of both inner and outer edge of the hexagonal pipe.

Where, S = side length of outer edge of the hexagonal pipe.
s = side length of inner edge of the hexagonal pipe.
Let us consider a 1 m long hexagonal pipe of side length at outer edge,  S = 10 mm = 0.010m and side length at inner edge, s = 8 mm = 0.008m
cross sectional Area = (3√(3 )) / 2 × ( S– s2 )
So, volume of the hexagonal rod = (3√(3 ))/2 × ( 0.0102 – 0.0082 ) × 1 = 0.0000935 m3
Hence, mass of hexagonal rod = density × volume = 7900 × 0.0000935 = 0.7389 kg.
By using this formula we can calculate the mass of hexagonal pipe of different dimensions.