# 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.

Calculate Round Bar Weight:
Total Weight = 0.00 lbs / 0.00 kg
Disclaimer: The weights shown in the above metal weight calculator are for guidance only and should not form the basis of any calculations where precise or accurate information is required. It isn’t uncommon for the theoretical weights and densities of materials to vary considerably from actual weights and densities, for example, due to differences in manufacturing processes and alloy/material compositions. Therefore, you should obtain relevant, accurate information from manufacturers if exact weight calculations are required.

## How to Use the Round Bar Weight Calculator

1. 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.

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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.

2. Use the ‘Number of Bars’ box to specify the number of pieces to include in the calculation.
3. 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.

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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:

• 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

4. 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:

V = π r2 l

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].

 Steel Round Bar – Imperial Weight Table Round Bar Diameter (inches) Stainless Steel Round Bar(Type 304) Mild Steel Round Bar Approximate Weight per Foot Approximate Weight per 20′ Bar Approximate Weight per Foot Approximate Weight per 20′ Bar 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 2-3/4″ 20.39 lbs 407.77 lbs 20.18 lbs 403.66 lbs 3″ 24.26 lbs 485.28 lbs 24.02 lbs 480.39 lbs 3-1/8″ 26.33 lbs 526.57 lbs 26.06 lbs 521.25 lbs 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 3-3/4″ 37.91 lbs 758.25 lbs 37.53 lbs 750.61 lbs 4″ 43.14 lbs 862.73 lbs 42.70 lbs 854.02 lbs 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 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 5″ 67.40 lbs 1348.01 lbs 66.72 lbs 1334.41 lbs 5-1/8″ 70.81 lbs 1416.25 lbs 70.10 lbs 1401.96 lbs 5-1/4″ 74.31 lbs 1486.18 lbs 73.56 lbs 1471.19 lbs 5-1/2″ 81.55 lbs 1631.09 lbs 80.73 lbs 1614.63 lbs 5-3/4″ 89.14 lbs 1782.74 lbs 88.24 lbs 1764.76 lbs 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 Round Bar Diameter (mm) Stainless Steel Round Bar(Type 304) Mild Steel Round Bar 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 10mm 0.62 kg 1.87 kg 0.62 kg 1.85 kg 12mm 0.90 kg 2.69 kg 0.89 kg 2.66 kg 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 16mm 1.59 kg 4.78 kg 1.58 kg 4.74 kg 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 40mm 9.97 kg 29.90 kg 9.87 kg 29.60 kg 45mm 12.61 kg 37.84 kg 12.49 kg 37.46 kg 50mm 15.57 kg 46.72 kg 15.42 kg 46.25 kg 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.