Steel tube

How to calculate the weight

The weight of tube is easily calculated. Simply multiply the appropriate alloy density by the calculation shown below of the required part.

Metric density (g/cm³) x (OD² - (OD - 2xT)²) x L x π/4000 = weight
Example 7.85g/cm³ x (75.0 mm² - (75.0 mm - 2x1.0 mm)²) x 1m x π/4000 = 1.825 kg


Imperial density (lbs/in³) x (OD² - (OD - 2xT)²) x L x π/4 = weight
Example 0.284 lbs/in³ x (3.5 in² - (3.5 in - 2x0.036 in)²) x 12in x π/4 = 1.335  lbs

For imperial weight calculations certain measurements (fractions) need to be converted to decimal inches.

For an accurate calculation it is also important to allow for the tolerances on diameter and wall thickness as defined by the manufacturing specification. Please contact us for details.

The following charts are samples of some of the common diameters and wall thicknesses that are available. Please contact us for details of our full product range and current stock availability.

Metric

Outside
Diameter
Wall
Thickness
Weight
mm mm kg/m
5.0 0.50 0.055
5.0 0.60 0.065
5.0 1.50 0.129
6.0 0.50 0.068
6.0 1.00 0.123
8.0 0.50 0.092
8.0 0.60 0.110
8.0 1.00 0.173
10.0 0.50 0.117
10.0 1.00 0.222
12.0 0.50 0.142
12.0 1.00 0.271
14.0 0.50 0.166
14.0 1.00 0.321
14.0 1.50 0.462
15.0 0.50 0.179
16.0 1.20 0.438
18.0 0.60 0.257
20.0 0.80 0.379
20.0 1.00 0.469
25.0 0.80 0.478
25.0 1.00 0.592
32.0 1.00 0.765
40.0 0.80 0.773
50.0 0.80 0.971
50.0 1.00 1.209
70.0 0.80 1.365
70.0 1.00 1.702
75.0 0.80 1.464
75.0 1.00 1.825
80.0 1.00 1.949
80.0 2.00 3.848
90.0 1.00 2.195
90.0 2.00 4.341
100.0 1.50 3.644
100.0 2.00 4.834

Density based on 7.85 g/cm3 (0.284 lbs/in3)

Densities

The acknowledged density of mild steel is 7.85 g/cm3 (0.284 lbs/in3). Dependent on the alloy elements added to manufactured specifications this can vary between 7.75 and 8.05 g/cm3 (0.280 and 0.291 lbs/in3).

Imperial

Outside
Diameter
Wall
Thickness
Weight
in in lbs/ft kgs/m
0.125 0.028 0.029 0.043
0.187 0.022 0.039 0.058
0.187 0.028 0.048 0.071
0.250 0.016 0.040 0.060
0.250 0.036 0.082 0.123
0.250 0.028 0.067 0.099
0.375 0.018 0.069 0.102
0.375 0.022 0.083 0.124
0.375 0.028 0.104 0.155
0.375 0.036 0.131 0.194
0.500 0.022 0.113 0.168
0.500 0.026 0.132 0.196
0.500 0.028 0.144 0.211
0.500 0.036 0.179 0.265
0.625 0.028 0.179 0.266
0.625 0.036 0.227 0.338
0.750 0.022 0.171 0.255
0.750 0.036 0.275 0.410
0.875 0.022 0.201 0.299
1.000 0.022 0.230 0.343
1.000 0.028 0.291 0.434
1.000 0.036 0.372 0.553
1.500 0.022 0.348 0.518
1.500 0.028 0.441 0.657
1.500 0.036 0.564 0.840
1.752 0.028 0.517 0.769
2.000 0.028 0.591 0.880
2.000 0.036 0.757 1.127
2.000 0.048 1.003 1.493
2.500 0.036 0.950 1.414
3.000 0.022 0.702 1.044
3.000 0.031 0.986 1.467
3.000 0.047 1.486 2.212
3.500 0.022 0.819 1.219
3.500 0.036 1.335 1.987
4.000 0.047 1.989 2.961