Steel Weight Calculator
From sheets and plates to equal or unequal angles, our handy calculator makes it quick and easy to calculate the weight of steel.
For technical guidance, please refer to the user guide below the calculator. We’ve also included a series of helpful stepbystep guides below that to show you the process of calculating the weight of a variety of steel sections in case you want to calculate these manually.
How to Use the Steel Weight Calculator

Use the ‘Select a Steel Profile’ dropdown to choose the profile type that you’d like to calculate the weight of.

Use the ‘Material’ dropdown in box (2) to choose the grade of steel for your selected profile.
The ‘Density’ box will automatically be populated based on the grade of steel you choose.
You can update the ‘Density’ figure if needed, although this is based on industry guidance for each material.
 Use the ‘Quantity’ box to specify how many units you’d like to include in the calculation.

Depending on the steel profile chosen, you’ll need to enter various dimensions, for example, ‘Length’, ‘Width’, ‘Diameter’, ‘Thickness’, or ‘Height’.
The calculator will automatically reformat depending on the steel profile type chosen, meaning only the relevant dimensions will be shown.
You can select the relevant units for each measurement using the ‘Unit’ dropdowns.
!Note: If you choose ‘inch’ as a unit, you’ll need to use either whole or decimal numbers instead of fractions. For example, 0.25 instead of ^{1}/_{4}.
Click the button below to view a table of common steel dimensions as decimals that you can use in the calculator:

Steel Weight Calculator – Inch to Decimal Conversion Table 1/8
0.125
19/16
1.5625
35/8
3.625
5/32
0.15625
15/8
1.625
311/16
3.6875
3/16
0.1875
111/16
1.6875
33/4
3.75
7/32
0.21875
13/4
1.75
313/16
3.8125
1/4
0.25
113/16
1.8125
37/8
3.875
9/32
0.28125
17/8
1.875
315/16
3.9375
5/16
0.1325
115/16
1.9375
4
4.00
11/32
0.34375
2
2.00
41/8
4.125
3/8
0.375
21/16
2.0625
43/16
4.1875
13/32
0.40625
21/8
2.125
41/4
4.25
7/16
0.4375
23/16
2.1875
45/16
4.3125
15/16
0.9375
21/4
2.25
43/8
4.375
1/2
0.5
25/16
2.3125
47/16
4.4375
17/32
0.53125
23/8
2.375
41/2
4.50
9/16
0.5625
27/16
2.4375
49/16
4.5625
19/32
0.59375
21/2
2.50
45/8
4.625
5/8
0.625
29/16
2.5625
411/16
4.6875
11/16
0.6875
25/8
2.625
5
5.00
3/4
0.75
211/16
2.6875
51/16
5.0625
13/16
0.8125
23/4
2.75
51/8
5.125
7/8
0.875
27/8
2.875
53/16
5.1875
13/16
0.8125
215/16
2.9375
51/4
5.25
15/16
0.9375
3
3.00
53/8
5.375
1
1.00
31/16
3.0625
57/16
5.4375
11/16
1.0625
31/8
3.125
51/2
5.50
11/8
1.125
33/16
3.1875
55/8
5.625
13/16
1.1875
31/4
3.25
53/4
5.75
11/4
1.25
35/16
3.3125
57/8
5.875
15/16
1.3125
33/8
3.375
515/16
5.9375
13/8
1.375
37/16
3.4375
6
6.00
17/16
1.4375
31/2
3.50
11/2
1.50
39/16
3.5625

 Use the ‘Calculate’ button to complete the calculation, and the ‘Reset’ button to reset the steel weight calculator.
How to Calculate the Weight of Steel
Don’t feel like using the steel weight calculator above? Here’s how to manually calculate the weight of a variety of common steel section types:
How to Calculate the Weight of Steel Sheet
The first step is to determine the volume of the steel sheet, with the equation as follows:
When calculating the weight of steel sheet stock, the equation consists of the following elements:
V = Volume
L = The length of the steel sheet
W = The width of the steel sheet
T = The steel sheet’s thickness
Let’s work through an example of a stainless steel (type 304) sheet that has a length of 2m, a width of 1m, and a thickness of 25mm.
Because we’re using a density of 7930 kg/m^{3} for the calculation, we’ll need to convert the dimensions in this example to meters. The length and width of the sheet are already in meters, so we don’t need to change these, but the 25mm thickness should be 0.025 (the width dimension converted to meters).
Here’s how the calculation works:
Volume = 2 x 1 x 0.025
Volume = 0.05m^{3}
Stainless Steel Type 304 Density = 7930 kg/m^{3}
If we multiply the 0.05^{3} volume figure by the 7930 kg/m^{3} density figure, we end up with a weight of 396.5 kg or 874.13 lbs.
Alternatively, use our steel weight calculator above to work out the weight of steel sheet stock quickly and easily.
How to Calculate the Weight of Steel Plate
You can work out the weight of steel plate using the same process outlined above for calculating the weight of a steel sheet.
The same formula is used to first determine the volume of the steel sheet:
The formula consists of the following elements:
V = Volume
L = The length of the steel sheet
W = The width of the steel sheet
T = The steel sheet’s thickness
We’ve shown a worked example of this equation in the section above.
How to Calculate the Weight of Steel Bar
The first step is to determine the volume of the steel bar, with the equation as follows for round bar stock:
When calculating the weight of a steel bar, the equation consists of the following elements:
V = Volume
π = Pi, or 3.142
r = The radius of the steel bar, squared
l = The length of the steel bar
Let’s work through an example of a stainless steel (type 304) round bar that has a diameter of 50mm and a length of 1meter.
In this case, we’ll be multiplying the Pi figure (3.142) by the radius squared (25mm for this example, or half the diameter value), and finally, we’ll be multiplying the length of the steel round bar (1m).
Because we’re using a density of 7930 kg/m^{3} for the calculation, we’ll need to convert the dimensions in this example to meters. The length of the bar is already 1meter, so we don’t need to change this, but the 25mm radius should be 0.025 (the radius dimension converted to meters).
Here’s how the calculation works:
Volume = (3.142 x (0.025 x 0.025)) x 1
Volume = 0.00196m^{3}
Stainless Steel Type 304 Density = 7930 kg/m^{3}
If we multiply the 0.00196m^{3} volume figure by the 7930 kg/m^{3} density figure, we end up with a weight of 15.54 kg or 34.26 lbs.
How to Calculate the Weight of Steel Pipe
The first step is to treat the pipe as if it’s a solid round bar, and so we’ll use the following equation to calculate the overall volume (disregarding the hollow part of the pipe for now):
The above equation consists of the following elements:
V = Volume
π = Pi, or 3.142
r = The radius of the steel bar, squared
l = The length of the steel bar
Let’s work through an example of a stainless steel (type 304) pipe that has a diameter of 50mm and a length of 1meter.
In this case, we’ll be multiplying the Pi figure (3.142) by the radius squared (25mm for this example, or half the diameter value), and finally, we’ll be multiplying the length of the steel round bar (1m).
Because we’re using a density of 7930 kg/m^{3} for the calculation, we’ll need to convert the dimensions in this example to meters. The length of the bar is already 1meter, so we don’t need to change this, but the 25mm radius should be 0.025 (the radius dimension converted to meters).
Here’s how the calculation works:
Overall Pipe Volume = (3.142 x (0.025 x 0.025)) x 1
Overall Pipe Volume = 0.00196m^{3}
The second step is to calculate the volume of the hollow section of the steel pipe, and we’ll use the same equation that we used in step one above.
Let’s assume that the 50mm pipe from step one has a thickness of 10mm, meaning that the diameter of the hollow section is 30mm (50mm minus two sides measuring 10mm in thickness each).
As above, we’ll need to convert the dimensions to meters given that we’re using a metric density of 7930 kg/m^{3} for the steel in the calculation. To suit the calculation, we’ll take the radius (half the diameter) and convert this to meters giving us a value of 0.015.
Here’s how the second part of the calculation works:
Hollow Section Volume = (3.142 x (0.015 x 0.015)) x 1
Hollow Section Volume = 0.00070m^{3}
Next, we need to subtract the volume of the hollow section of pipe from the overall pipe’s volume.
For example:
Total Volume = Overall Pipe Volume – Hollow Section Volume
Total Volume = 0.00126m^{3}
If we multiply the 0.00126m^{3} volume figure by the 7930 kg/m^{3} density figure, we end up with a weight of 9.99 kg or 22.02 lbs for the steel pipe.
Steel Density Information – Common Types of Steel
The following table shows the density data in both metric and imperial measurements for common types of steel:
Steel Density Information 

Steel Type 
Density 

Metric 
Imperial 

Mild Steel 
7850 kg/m^{3} 
490.07 lb/ft^{3} 

Stainless Steel (301) 
7880 kg/m^{3} 
491.95 lb/ft^{3} 

Stainless Steel (302) 
8030 kg/m^{3} 
501.31 lb/ft^{3} 

Stainless Steel (303) 
8030 kg/m^{3} 
501.31 lb/ft^{3} 

Stainless Steel (304) 
7930 kg/m^{3} 
495.07 lb/ft^{3} 

Stainless Steel (309) 
7900 kg/m^{3} 
493.20 lb/ft^{3} 

Stainless Steel (310) 
7900 kg/m^{3} 
493.20 lb/ft^{3} 

Stainless Steel (316) 
7990 kg/m^{3} 
498.81 lb/ft^{3} 

Stainless Steel (321) 
7900 kg/m^{3} 
493.20 lb/ft^{3} 

Stainless Steel (409) 
7610 kg/m^{3} 
475.09 lb/ft^{3} 

Stainless Steel (410) 
7800 kg/m^{3} 
486.95 lb/ft^{3} 

Stainless Steel (416) 
7750 kg/m^{3} 
483.83 lb/ft^{3} 

Stainless Steel (420) 
7800 kg/m^{3} 
486.95 lb/ft^{3} 

Stainless Steel (430) 
7750 kg/m^{3} 
483.83 lb/ft^{3} 

Stainless Steel (440) 
7800 kg/m^{3} 
486.95 lb/ft^{3} 