brass round bar weight calculator
Enter the dimensions of a brass round bar and this works out its volume and weight. C360 free-cutting brass, 61.5% copper. Cartridge brass C260 is nearer 8530.
- Weight of one round bar
- 4.172 43
- Volume of one piece
- 490.874
- Weight per metre of length
- 4.172 43 kg/m
- Density used
- 8500 kg/m3
Show the working
- Diameter = 25
- Length = 1000
- Number of pieces = 1
- volume_mm3 = pi * (25/2)^2 * 1000 = 490 874
- Volume of one piece = 490 874 / 1000 = 490.874
- Density used = 8500 = 8500
- Weight of one round bar = 490 874 * 8500 / 1e9 = 4.172 43
- Total weight = 4.172 43 * 1 = 4.172 43
- Weight per metre of length = 490 874 / 1000 * 1000 * 8500 / 1e9 = 4.172 43
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 x (diameter / 2)^2 x length
- Weight = volume x density, with density = 8500 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.
C360 free-cutting brass, 61.5% copper. Cartridge brass C260 is nearer 8530.
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 brass?
8500 kg/m3, which is 8.500 g/cm3. C360 free-cutting brass, 61.5% copper. Cartridge brass C260 is nearer 8530.
How do you calculate the weight of a brass round bar?
Volume = pi x (diameter / 2)^2 x length. Multiply the volume by the density of brass, 8500 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.
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