tin rectangular tube weight calculator

Enter the dimensions of a tin rectangular tube and this works out its volume and weight. White (beta) tin, the room-temperature form.

Outside width

Outside height

Wall thickness

Length

Number of pieces

Total weight

5.000 04kg

= Exact tin rectangular tube weight Show in

Weight of one rectangular tube: 5.000 04
Volume of one piece: 684
Weight per metre of length: 5.000 04 kg/m
Density used: 7310 kg/m3

Show the working

Outside width = 80
Outside height = 40
Wall thickness = 3
Length = 1000
Number of pieces = 1
volume_mm3 = (80*40 - (80 - 2*3)*(40 - 2*3)) * 1000 = 684 000
Volume of one piece = 684 000 / 1000 = 684
Density used = 7310 = 7310
Weight of one rectangular tube = 684 000 * 7310 / 1e9 = 5.000 04
Total weight = 5.000 04 * 1 = 5.000 04
Weight per metre of length = 684 000 / 1000 * 1000 * 7310 / 1e9 = 5.000 04

Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.

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The formula

Volume = (outer area - inner area) x length, ignoring the corner radii
Weight = volume x density, with density = 7310 kg/m3
One cubic millimetre of a material at 1000 kg/m3 weighs exactly one milligram, so the millimetre-to-kilogram step is a shift of the decimal point rather than a rounded factor.

White (beta) tin, the room-temperature form.

Dimensions are nominal. Mill tolerances on thickness, and the corner radii on formed sections, both move the real weight by a percent or two.

Every field takes inches or feet as readily as millimetres: change the unit next to it and the conversion is done exactly before the arithmetic starts.

Frequently asked

What is the density of tin?

7310 kg/m3, which is 7.310 g/cm3. White (beta) tin, the room-temperature form.

How do you calculate the weight of a tin rectangular tube?

Volume = (outer area - inner area) x length, ignoring the corner radii. Multiply the volume by the density of tin, 7310 kg/m3, taking care that both are in the same unit system.

Can I enter dimensions in inches?

Yes. Each dimension field has its own unit selector, and inch, foot, millimetre, centimetre and metre entries are all converted exactly before anything is multiplied.

Where the numbers come from

Densities are nominal room-temperature values for the grade named, drawn from the usual mill and handbook figures.