Weight converter calculator12/13/2023 W = The width of the square tube, squared How to Calculate the Weight of Square TubeĪs with the round tube weight calculation above, calculating the weight of square tube is a three-step process. If we multiply the 0.00081m 3 volume figure by the 7850 kg/m 3 density figure for mild steel, we end up with a weight of 6.36 kg or 14.02 lbs for the round tube. Total Volume = Overall Round Tube Volume – Hollow Section Volume Hollow Section Volume = (3.142 x (0.012 x 0.012)) x 1įinally, we need to subtract the volume of the hollow section of the round tube from the tube’s overall volume. Here’s how the second part of the calculation works: So, we’ll use a figure of 0.012 for the radius of the hollow section (the radius is half of the diameter, remember). Next, we need to calculate the volume of the hollow section of the round tube, and we’ll use the same equation from step one above to do so.įor this example, we’ll assume that the 40mm round tube has a thickness of 8mm, meaning the hollow section of the round tube has a diameter of 24mm (40mm minus the sides which measure 8mm each in thickness).Īs above, we’ll need to convert the dimensions to meters to suit the 7850 kg/m 3 density we’re using for mild steel in the calculation. We can then calculate the volume of the round tube as if it was a solid bar as follows: We don’t need to change the length as it’s already in meters (1-meter in this case), but the 20mm radius should be 0.020 (the radius dimension converted to meters). To show you how the calculation works, we’ll work through an example of a mild steel round tube with a diameter of 40mm and a length of 1-meter.Īdvertisements For this calculation, we’ll be multiplying the Pi figure of 3.142 by the round tube’s radius squared (the radius is half the diameter, so 20mm for this example), and finally, we’ll be multiplying this by the round tube’s length (1-meter in this case).Īs we’re using a density of 7850 kg/m 3 for this calculation (i.e., mild steel’s density on a per meter basis), we’ll need to convert each of the other dimensions used in the formula to meters. R = The radius of the round tube, squared
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