### How To Calculate Weight Of Mild Steel Bar

Mild steel is a plain low carbon steel without any alloying elements. It is very ductile and is used as a structural steel for ordinary applications in civil construction so it’s very important to know how to calculate weight of mild steel bar.

Here we are going to explain how to calculate unit weight of steel:

we know that:

Weight = Volume x Density

Volume we can get from Diameter of steel and height of steel.

So Volume of steel bar = A x H , so here A = area of steel H = Height or length of steel one meter

Here we have to Find out Unit weight of steel for 1 meter steel

Dia of steel = D = 8 mm , Length of Steel = 1 meter

Find volume of Steel bar

Volume of bar = 3.14 x (0.008)2 / 4 x 1

Volume of bar = 0.00005024 m3

We know that density = 7850 kg/m3

So Weight of 1 meter steel

Weight of steel = Volume of Steel x Density of steel

Weight = 0.00005024 x 7850 = 0.395 kg

Given formula can be used to find out the unit weight of steel :

Unite of Steel = D2/162

Let’s Check we will use the 8mm dia of steel you can use the different diameter of steel but in mm.

D2/162 = (8)2/162 = 0.395 kg (This is the weight of 1 meter steel )

For 6 mm steel the weight is 0.222 kg/m

For 8 mm steel the weight is 0.395 kg/m

For 10 mm steel the weight is 0.616 kg/m

For 12 mm steel the weight is 0.888 kg/m

For 16 mm steel the weight is 1.578 kg/m

For 20 mm steel the weight is 2.466 kg/m

For 25 mm steel the weight is 3.853 kg/m

For 32 mm steel the weight is 6.313 kg/m

For 40 mm steel the weight is 9.865 kg/m

For 8 mm steel the weight is 0.395 kg/m

For 10 mm steel the weight is 0.616 kg/m

For 12 mm steel the weight is 0.888 kg/m

For 16 mm steel the weight is 1.578 kg/m

For 20 mm steel the weight is 2.466 kg/m

For 25 mm steel the weight is 3.853 kg/m

For 32 mm steel the weight is 6.313 kg/m

For 40 mm steel the weight is 9.865 kg/m

The above Unite Weight Of Steel we can Find out with

**D2/162**formula
PROOF OF D2/162

Unit weight of steel (for 1 meter length) = D2/162 = (8)2/162 = 0.395 kg

Both the values are same, which means the formula is right.

For different lengths, weight of steel = d2/162 x length

Here we are going to explain how it has been arrived D2/162 (Note: D unit is in MM)

Density of Steel (in Kgs/Cu.m) = Weight of Steel (in Kgs)/Volume of Steel (in Cu.m)

So,

Weight of Bar (in Kgs) = Volume of Steel Bar (in Cu.m) X Density of Steel Bar (in Kgs/Cu.m)

**Data:**

Volume of Steel Bar (Cu.m) = Area of Steel Bar (sq.mtr) X Length of Steel Bar (mtr)

Since We are trying to calculate the unit weight of Steel Bar, the length of Steel Bar in the calculation would be 1 mtr or 1000 mm.

Area of Steel Bar = (3.14 X D^2)/4

Density of Steel Bar = 7850 Kgs/Cu.m = 7850/(1000X1000X1000) Cubic mm

So considering these data in the Weight formula we get

Unit Weight of Steel Bar (in Kgs) = (3.14 X D^2)/4 X 1000 X 7850 / (1000 X 1000 X 1000)

= D^2 X (0.006162)

To simplify, we can reciprocate the decimal figure here i.e., (1/0.006162) and get a figure of 162.28

Unit weight of Steel Bar (in Kgs) = (D^2)/162.28 ~ (D^2)/162

Where D is the Diameter of the Steel Bar in mm.

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