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magnesium hex bar weight calculator

Enter the dimensions of a magnesium hex bar and this works out its volume and weight. AZ31B wrought magnesium: the lightest structural metal in common use.

Total weight
0.958 041kg
≈ Rounded magnesium hex bar weight
Weight of one hex bar
0.958 041
Volume of one piece
541.266
Weight per metre of length
0.958 041 kg/m
Density used
1770 kg/m3
Show the working
  1. Across flats = 25
  2. Length = 1000
  3. Number of pieces = 1
  4. volume_mm3 = sqrt(3)/2 * 25^2 * 1000 = 541 266
  5. Volume of one piece = 541 266 / 1000 = 541.266
  6. Density used = 1770 = 1770
  7. Weight of one hex bar = 541 266 * 1770 / 1e9 = 0.958 041
  8. Total weight = 0.958 041 * 1 = 0.958 041
  9. Weight per metre of length = 541 266 / 1000 * 1000 * 1770 / 1e9 = 0.958 041

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 = (sqrt(3) / 2) x across-flats^2 x length
    • Weight = volume x density, with density = 1770 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.

    AZ31B wrought magnesium: the lightest structural metal in common 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 magnesium?

    1770 kg/m3, which is 1.770 g/cm3. AZ31B wrought magnesium: the lightest structural metal in common use.

    How do you calculate the weight of a magnesium hex bar?

    Volume = (sqrt(3) / 2) x across-flats^2 x length. Multiply the volume by the density of magnesium, 1770 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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