platinum round tube weight calculator

Enter the dimensions of a platinum round tube and this works out its volume and weight. Pure platinum, one of the densest metals in commercial use.

Outside diameter

Wall thickness

Length

Number of pieces

Total weight

9.501 59kg

≈ Rounded platinum round tube weight Show in

Weight of one round tube: 9.501 59
Volume of one piece: 442.965
Weight per metre of length: 9.501 59 kg/m
Density used: 21 450 kg/m3

Show the working

Outside diameter = 50
Wall thickness = 3
Length = 1000
Number of pieces = 1
volume_mm3 = pi/4 * (50^2 - (50 - 2*3)^2) * 1000 = 442 965
Volume of one piece = 442 965 / 1000 = 442.965
Density used = 21450 = 21 450
Weight of one round tube = 442 965 * 21 450 / 1e9 = 9.501 59
Total weight = 9.501 59 * 1 = 9.501 59
Weight per metre of length = 442 965 / 1000 * 1000 * 21 450 / 1e9 = 9.501 59

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 = (pi / 4) x (OD^2 - ID^2) x length, where ID = OD - 2 x wall
Weight = volume x density, with density = 21450 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.

Pure platinum, one of the densest metals in commercial use.

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 platinum?

21450 kg/m3, which is 21.450 g/cm3. Pure platinum, one of the densest metals in commercial use.

How do you calculate the weight of a platinum round tube?

Volume = (pi / 4) x (OD^2 - ID^2) x length, where ID = OD - 2 x wall. Multiply the volume by the density of platinum, 21450 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.