Round Bar Weight Calculator
From aluminum to stainless steel, our handy calculator makes it quick and easy to calculate the weight of round bar stock.
For technical guidance, please refer to the user guide below the calculator. We’ve also included a series of helpful reference tables below that display additional round bar weight information, for example, on a per foot or meter basis.
How to Use the Round Bar Weight Calculator
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Use the ‘Round Bar Material’ box to choose a material. Various materials are available as standard ranging from steel to aluminum and copper.
The ‘Density’ box will automatically be populated based on your material choice (unless you choose ‘Other’, with this option allowing you to use the calculator with other round bar materials not already included).
You can update the ‘Density’ figure if needed, although this is based on industry guidance for each material.
!Note: If you choose ‘Other’ as a material, you’ll need to insert a density (on a kg/m3 basis) for the calculator to function.
- Use the ‘Number of Bars’ box to specify the number of pieces to include in the calculation.
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Use the ‘Round Bar Length’ and ‘Round Bar Diameter’ boxes to specify the size of round bar to include in the specification.
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 enter either whole or decimal numbers instead of fractions. For example, 0.25 instead of 1/4.
Click the button below to view or close a table of common round bar inch thicknesses as decimals that you can use in the calculator:
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Round Bar Diameter – Inch to Decimal Conversion Table 1/8
0.125
1-9/16
1.5625
3-5/8
3.625
5/32
0.15625
1-5/8
1.625
3-11/16
3.6875
3/16
0.1875
1-11/16
1.6875
3-3/4
3.75
7/32
0.21875
1-3/4
1.75
3-13/16
3.8125
1/4
0.25
1-13/16
1.8125
3-7/8
3.875
9/32
0.28125
1-7/8
1.875
3-15/16
3.9375
5/16
0.1325
1-15/16
1.9375
4
4.00
11/32
0.34375
2
2.00
4-1/8
4.125
3/8
0.375
2-1/16
2.0625
4-3/16
4.1875
13/32
0.40625
2-1/8
2.125
4-1/4
4.25
7/16
0.4375
2-3/16
2.1875
4-5/16
4.3125
15/16
0.9375
2-1/4
2.25
4-3/8
4.375
1/2
0.5
2-5/16
2.3125
4-7/16
4.4375
17/32
0.53125
2-3/8
2.375
4-1/2
4.50
9/16
0.5625
2-7/16
2.4375
4-9/16
4.5625
19/32
0.59375
2-1/2
2.50
4-5/8
4.625
5/8
0.625
2-9/16
2.5625
4-11/16
4.6875
11/16
0.6875
2-5/8
2.625
5
5.00
3/4
0.75
2-11/16
2.6875
5-1/16
5.0625
13/16
0.8125
2-3/4
2.75
5-1/8
5.125
7/8
0.875
2-7/8
2.875
5-3/16
5.1875
13/16
0.8125
2-15/16
2.9375
5-1/4
5.25
15/16
0.9375
3
3.00
5-3/8
5.375
1
1.00
3-1/16
3.0625
5-7/16
5.4375
1-1/16
1.0625
3-1/8
3.125
5-1/2
5.50
1-1/8
1.125
3-3/16
3.1875
5-5/8
5.625
1-3/16
1.1875
3-1/4
3.25
5-3/4
5.75
1-1/4
1.25
3-5/16
3.3125
5-7/8
5.875
1-5/16
1.3125
3-3/8
3.375
5-15/16
5.9375
1-3/8
1.375
3-7/16
3.4375
6
6.00
1-7/16
1.4375
3-1/2
3.50
1-1/2
1.50
3-9/16
3.5625
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- Use the ‘Calculate’ button to complete the calculation, and the ‘Reset’ button to reset the round bar weight calculator.
How to Calculate the Weight of Round Bar
The first step is to determine the volume of the round bar, with the formula as follows:
When calculating the weight of a round bar, the equation consists of the following elements:
V = Volume
π = Pi, or 3.142
r = The radius of the round bar, squared
l = The length of the round 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 1-meter.
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 bar (1m).
Because we’re using a density of 7930 kg/m3 for the calculation, we’ll need to convert the dimensions in this example to meters. The length of the bar is already 1-meter, 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 = 0.00196m3
Stainless Steel Type 304 Density = 7930 kg/m3
If we multiply the 0.00196m3 volume figure by the 7930 kg/m3 density figure, we end up with a calculated weight of 15.54 kg or 34.26 lbs.
Round Bar Reference Weight Tables
Steel Round Bar – Reference Weight Table (Imperial)
For those in the United States, or for anyone who prefers working with imperial sizing, here’s a summary of the approximate weight of both stainless and mild steel round bar across a variety of imperial diameters:
[Scroll table if necessary].
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Steel Round Bar – Imperial Weight Table |
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Round Bar Diameter (inches) |
Stainless Steel Round Bar |
Mild Steel Round Bar |
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|
Approximate Weight per Foot |
Approximate Weight per 20′ Bar |
Approximate Weight per Foot |
Approximate Weight per 20′ Bar |
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|
1/8″ |
0.04 lbs |
0.84 lbs |
0.04 lbs |
0.83 lbs |
|
1/4″ |
0.17 lbs |
3.37 lbs |
0.17 lbs |
3.34 lbs |
|
1/2″ |
0.67 lbs |
13.48 lbs |
0.67 lbs |
13.34 lbs |
|
3/4″ |
1.52 lbs |
30.33 lbs |
1.50 lbs |
30.02 lbs |
|
1″ |
2.70 lbs |
53.92 lbs |
2.67 lbs |
53.38 lbs |
|
1-1/8″ |
3.41 lbs |
68.24 lbs |
3.38 lbs |
67.55 lbs |
|
1-1/4″ |
4.21 lbs |
84.25 lbs |
4.17 lbs |
83.40 lbs |
|
1-1/2″ |
6.07 lbs |
121.32 lbs |
6.00 lbs |
120.10 lbs |
|
1-3/4″ |
8.26 lbs |
165.13 lbs |
8.17 lbs |
163.47 lbs |
|
2″ |
10.78 lbs |
215.68 lbs |
10.68 lbs |
213.51 lbs |
|
2-1/8″ |
12.17 lbs |
243.48 lbs |
12.05 lbs |
241.03 lbs |
|
2-1/4″ |
13.65 lbs |
272.97 lbs |
13.51 lbs |
270.22 lbs |
|
2-1/2″ |
16.85 lbs |
337 lbs |
16.68 lbs |
333.60 lbs |
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2-3/4″ |
20.39 lbs |
407.77 lbs |
20.18 lbs |
403.66 lbs |
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3″ |
24.26 lbs |
485.28 lbs |
24.02 lbs |
480.39 lbs |
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3-1/8″ |
26.33 lbs |
526.57 lbs |
26.06 lbs |
521.25 lbs |
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3-1/4″ |
28.48 lbs |
569.53 lbs |
28.19 lbs |
563.79 lbs |
|
3-1/2″ |
33.03 lbs |
660.52 lbs |
32.69 lbs |
653.86 lbs |
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3-3/4″ |
37.91 lbs |
758.25 lbs |
37.53 lbs |
750.61 lbs |
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4″ |
43.14 lbs |
862.73 lbs |
42.70 lbs |
854.02 lbs |
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4-1/8″ |
45.87 lbs |
917.49 lbs |
45.41 lbs |
908.23 lbs |
|
4-1/4″ |
48.70 lbs |
973.94 lbs |
48.21 lbs |
964.11 lbs |
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4-1/2″ |
54.59 lbs |
1091.89 lbs |
54.04 lbs |
1080.87 lbs |
|
4-3/4″ |
60.83 lbs |
1216.58 lbs |
60.22 lbs |
1204.30 lbs |
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5″ |
67.40 lbs |
1348.01 lbs |
66.72 lbs |
1334.41 lbs |
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5-1/8″ |
70.81 lbs |
1416.25 lbs |
70.10 lbs |
1401.96 lbs |
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5-1/4″ |
74.31 lbs |
1486.18 lbs |
73.56 lbs |
1471.19 lbs |
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5-1/2″ |
81.55 lbs |
1631.09 lbs |
80.73 lbs |
1614.63 lbs |
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5-3/4″ |
89.14 lbs |
1782.74 lbs |
88.24 lbs |
1764.76 lbs |
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6″ |
97.06 lbs |
1941.13 lbs |
96.08 lbs |
1921.55 lbs |
Steel Round Bar – Reference Weight Table (Metric)
For those residing outside of the United States, or for anyone who prefers working with metric sizing, here’s a summary of the approximate weight of both stainless and mild steel round bar across a variety of metric diameters:
[Scroll table if necessary].
|
Steel Round Bar – Metric Weight Table |
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Round Bar Diameter (mm) |
Stainless Steel Round Bar |
Mild Steel Round Bar |
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|
Approximate Weight per Meter |
Approximate Weight per 3m Bar |
Approximate Weight per Meter |
Approximate Weight per 3m Bar |
|
|
3mm |
0.06 kg |
0.17 kg |
0.06 kg |
0.17 kg |
|
4mm |
0.10 kg |
0.30 kg |
0.10 kg |
0.30 kg |
|
5mm |
0.16 kg |
0.47 kg |
0.15 kg |
0.46 kg |
|
6mm |
0.22 kg |
0.67 kg |
0.22 kg |
0.67 kg |
|
7mm |
0.31 kg |
0.92 kg |
0.30 kg |
0.91 kg |
|
8mm |
0.40 kg |
1.20 kg |
0.39 kg |
1.18 kg |
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10mm |
0.62 kg |
1.87 kg |
0.62 kg |
1.85 kg |
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12mm |
0.90 kg |
2.69 kg |
0.89 kg |
2.66 kg |
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14mm |
1.22 kg |
3.66 kg |
1.21 kg |
3.63 kg |
|
15mm |
1.40 kg |
4.20 kg |
1.39 kg |
4.16 kg |
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16mm |
1.59 kg |
4.78 kg |
1.58 kg |
4.74 kg |
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18mm |
2.02 kg |
6.05 kg |
2.00 kg |
5.99 kg |
|
20mm |
2.49 kg |
7.47 kg |
2.47 kg |
7.40 kg |
|
22mm |
3.01 kg |
9.04 kg |
2.98 kg |
8.95 kg |
|
24mm |
3.59 kg |
10.76 kg |
3.55 kg |
10.66 kg |
|
25mm |
3.89 kg |
11.68 kg |
3.85 kg |
11.56 kg |
|
28mm |
4.88 kg |
14.65 kg |
4.83 kg |
14.50 kg |
|
30mm |
5.61 kg |
16.82 kg |
5.55 kg |
16.65 kg |
|
32mm |
6.38 kg |
19.14 kg |
6.31 kg |
18.94 kg |
|
34mm |
7.20 kg |
21.60 kg |
7.13 kg |
21.38 kg |
|
36mm |
8.07 kg |
24.22 kg |
7.99 kg |
23.97 kg |
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40mm |
9.97 kg |
29.90 kg |
9.87 kg |
29.60 kg |
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45mm |
12.61 kg |
37.84 kg |
12.49 kg |
37.46 kg |
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50mm |
15.57 kg |
46.72 kg |
15.42 kg |
46.25 kg |
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56mm |
19.53 kg |
58.60 kg |
19.34 kg |
58.01 kg |
|
60mm |
22.42 kg |
67.27 kg |
22.20 kg |
66.59 kg |
|
63mm |
24.72 kg |
74.17 kg |
24.47 kg |
73.42 kg |
|
63.5mm |
25.12 kg |
75.35 kg |
24.86 kg |
74.59 kg |
|
65mm |
26.32 kg |
78.95 kg |
26.05 kg |
78.16 kg |
|
70mm |
30.52 kg |
91.57 kg |
30.21 kg |
90.64 kg |
|
73mm |
33.19 kg |
99.58 kg |
32.86 kg |
98.58 kg |
|
75mm |
35.04 kg |
105.11 kg |
34.68 kg |
104.05 kg |
|
78mm |
37.90 kg |
113.69 kg |
37.52 kg |
112.55 kg |
|
80mm |
39.87 kg |
119.60 kg |
39.46 kg |
118.39 kg |
|
83mm |
42.91 kg |
128.74 kg |
42.48 kg |
127.44 kg |
|
85mm |
45.00 kg |
135.01 kg |
44.55 kg |
133.65 kg |
|
90mm |
50.46 kg |
151.37 kg |
49.95 kg |
149.84 kg |
|
92mm |
52.72 kg |
158.17 kg |
52.19 kg |
156.57 kg |
|
93mm |
53.87 kg |
161.62 kg |
53.33 kg |
159.99 kg |
|
95mm |
56.22 kg |
168.65 kg |
55.65 kg |
166.95 kg |
|
100mm |
62.29 kg |
186.87 kg |
61.66 kg |
184.99 kg |
|
105mm |
68.67 kg |
206.02 kg |
67.98 kg |
203.95 kg |
|
110mm |
75.37 kg |
226.11 kg |
74.61 kg |
223.83 kg |
|
115mm |
82.38 kg |
247.14 kg |
81.55 kg |
244.64 kg |
|
125mm |
97.33 kg |
291.99 kg |
96.35 kg |
289.04 kg |
Quick Reference Information
MS Round Bar Weight
Mild steel round bar has a typical density of 7850 kg/m3 (490 lbs/ft3).
In 20-foot lengths, mild steel round bar weighs 13.34 lbs at 1/2″ or 53.38 lbs at 1″ diameter.
In metric sizes, a 12mm diameter, 3-meter mild steel round bar weighs 2.66 kg, while a 25mm diameter bar of the same length weighs 11.56 kg.
SS Round Bar Weight
Type 304 stainless-steel round bar has a typical density of 7930 kg/m3 (495 lbs/ft3).
A 20-foot, 1/2″ diameter stainless steel round bar weighs 13.48 lbs, or 53.92 lbs at 1″ diameter.
In metric sizes, a 12mm diameter, 3-meter stainless steel round bar weighs 2.69 kg, while a 25mm diameter bar weighs 11.68 kg.
Aluminum Round Bar Weight
6061 aluminum round bar has a typical density of 2700 kg/m3 (168.56 lbs/ft3).
A 20-foot, 1/2″ diameter 6061 aluminum round bar weighs 4.59 lbs, or 18.36 lbs at 1″ diameter.
In metric sizes, a 12mm diameter, 3-meter 6061 aluminum round bar weighs 0.92 kg, while a 25mm diameter bar weighs 3.98 kg.
Brass Round Bar Weight
Brass round bar has a typical density of 8525 kg/m3 (532.20 lbs/ft3).
A 20-foot, 1/2″ diameter brass round bar weighs 14.49 lbs, or 57.97 lbs at 1″ diameter.
In metric sizes, a 12mm diameter, 3-meter brass round bar weighs 2.89 kg, while a 25mm diameter bar weighs 12.56 kg.
Titanium Round Bar Weight
Titanium round bar has a typical density of 4506 kg/m3 (281.30 lbs/ft3).
A 20-foot, 1/2″ diameter titanium round bar weighs 7.66 lbs, or 30.64 lbs at 1″ diameter.
In metric sizes, a 12mm diameter, 3-meter titanium round bar weighs 1.53 kg, while a 25mm diameter bar weighs 6.64 kg.
Other Helpful Weight Calculators
Calculators by Section Type:
Calculators by Material:
