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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