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acrylic rod weight calculator

Enter the dimensions of a acrylic rod and this works out its volume and weight. Cast or extruded PMMA. Cast sheet is marginally denser than extruded.

Total weight
0.579 231kg
≈ Rounded acrylic rod weight
Weight of one rod
0.579 231
Volume of one piece
490.874
Weight per metre of length
0.579 231 kg/m
Density used
1180 kg/m3
Show the working
  1. Diameter = 25
  2. Length = 1000
  3. Number of pieces = 1
  4. volume_mm3 = pi * (25/2)^2 * 1000 = 490 874
  5. Volume of one piece = 490 874 / 1000 = 490.874
  6. Density used = 1180 = 1180
  7. Weight of one rod = 490 874 * 1180 / 1e9 = 0.579 231
  8. Total weight = 0.579 231 * 1 = 0.579 231
  9. Weight per metre of length = 490 874 / 1000 * 1000 * 1180 / 1e9 = 0.579 231

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 = 1180 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.

    Cast or extruded PMMA. Cast sheet is marginally denser than extruded.

    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 acrylic?

    1180 kg/m3, which is 1.180 g/cm3. Cast or extruded PMMA. Cast sheet is marginally denser than extruded.

    How do you calculate the weight of a acrylic rod?

    Volume = pi x (diameter / 2)^2 x length. Multiply the volume by the density of acrylic, 1180 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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