Calculate tube weight from outside diameter, wall thickness and length for steel, stainless, aluminium and other common materials, in kg and lbs.
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Request a Proposal →Published starting values are not measurements. They are recommendations, and they differ because each manufacturer optimises for something different — tool life, surface finish, chip control, or spindle power. Two suppliers can quote the same ISO grade and give you cutting speeds 30% apart, and each figure can be right for that supplier’s own geometry, edge preparation and coating.
That is why the number this calculator returns is a starting point, not a setting. Treat the catalogue figure as the middle of a band, then correct it on the first part: if the chips come off blue or the spindle load sits above roughly 80%, come down; if the finish is smeared and the chips are thin and stringy, come up. Write down what actually worked — that shop-specific number beats any published value.
Tubes and hollow sections are lighter than solid bars of the same outer diameter, making them ideal for structural applications, fluid systems, and weight-sensitive designs. This calculator computes tube weight from the cross-sectional area of the annulus.
A tube with OD 50 mm and wall 5 mm (ID 40 mm) weighs 36% of the solid bar weight. The hollow centre removes 64% of the mass. For weight-critical designs, tubes and hollow shafts offer significant savings. The trade-off is reduced bending stiffness and torsional strength.
Schedule 80 pipe has thicker walls than Schedule 40. For 2-inch NPS: Sch 40 wall = 3.91 mm (5.44 kg/m), Sch 80 wall = 5.54 mm (7.48 kg/m). Sch 80 is about 37% heavier. Always use the actual OD and wall thickness for weight calculations rather than nominal pipe sizes.
Use a ball-anvil micrometer (tube micrometer) or ultrasonic thickness gauge. Standard flat-anvil micrometers give false readings on curved tube surfaces. Measure at multiple points around the circumference -- seamless tube can have 5-10% wall variation.
Enter the outer diameter, inner diameter (or wall thickness), length, and material density. The calculator gives the tube weight and cross-sectional area. If you only know wall thickness, subtract 2x wall from OD to get ID.
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Use the calculator freely. If the result points to a tooling or process problem, we can source the exact carbide tooling you need from vetted factories in China. Compare factory-direct pricing.
Before you commit to a spec, it helps to know what the market pays for it. These are real, publicly listed factory prices — not a quotation, and not a guess.
We source the tool families below direct from vetted Chinese factories, matched to the material and tolerance you just worked out. Every batch ships with its material certificate and dimensional record.
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WEIGHING TUBE OR PIPE? Weight drives freight; grade drives price. Both have to be right before a landed cost means anything. See how to build a landed cost for tooling.
We source carbide cutting tools from China for job shops. We do not own a factory, which is why we can quote your drawing against two or three plants that actually run your material.
Cutting formulas with the units worked through · Speed and feed starting points for all six ISO material groups · How to read a carbide grade past its ISO code. 12 pages.
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