phosphor bronze round bar weight calculator

Enter the dimensions of a phosphor bronze round bar and this works out its volume and weight. C510 spring bronze, used where a copper alloy has to flex repeatedly.

Diameter

Length

Number of pieces

Total weight

4.349 14kg

≈ Rounded phosphor bronze round bar weight Show in

Weight of one round bar: 4.349 14
Volume of one piece: 490.874
Weight per metre of length: 4.349 14 kg/m
Density used: 8860 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 = 8860 = 8860
Weight of one round bar = 490 874 * 8860 / 1e9 = 4.349 14
Total weight = 4.349 14 * 1 = 4.349 14
Weight per metre of length = 490 874 / 1000 * 1000 * 8860 / 1e9 = 4.349 14

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 = 8860 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.

C510 spring bronze, used where a copper alloy has to flex repeatedly.

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 phosphor bronze?

8860 kg/m3, which is 8.860 g/cm3. C510 spring bronze, used where a copper alloy has to flex repeatedly.

How do you calculate the weight of a phosphor bronze round bar?

Volume = pi x (diameter / 2)^2 x length. Multiply the volume by the density of phosphor bronze, 8860 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.