Calculate acrylic mass in pounds or kilograms from density, selected shape, and dimensions for sheets, bars, tubes, angles, T bars, and C channels. Choose each inputโs unit beside the field.
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Acrylic Weight Formulas
The following formulas are used to calculate the weight of Acrylic in different shapes.
Acrylic Flat Sheet/Square Bar Weight Formula = L * W * T * d
Acrylic Round Bar Weight Formula = pi * D^2/4 * L * d
Acrylic Square Hollow Tube Weight Formula = [W^2-(W-2T)^2] * L * d
Acrylic Round Hollow Tube Weight Formula = pi * (R^2-r^2) * L * d
Acrylic Square Angle Weight Formula = (2*W*T – T^2) * L * d
Acrylic T bar Weight Formula = (W*T + (H-T)*T) * L * d
Acrylic C Channel Weight Formula = (2*W*T2 + H*T1) * L * d
Variables used in these equations:
- L is the length
- W is the width (or outer width/leg width depending on the shape)
- H is the height (for the C-channel formula above, H is the inner height)
- T is the thickness (for the T-bar formula above, the flange and web are assumed to have the same thickness T)
- d is the density
- D is the outer diameter
- R is the outer radius
- r is the inner radius
- T1 is the thickness along the width (web thickness for the C-channel)
- T2 is the thickness along the height (flange thickness for the C-channel)
The calculator converts each selected length unit and density unit automatically. Its internal units are inches and lb/inยณ; results can be pounds or kilograms. Round hollow tube inputs are radii. C-channel inner height is the clear gap between its two flanges.
What is the density of Acrylic?
The calculator retains a default acrylic density of 0.0426 lb/inยณ (approximately 1179 kg/mยณ). Grade-specific values differ; typical PMMA datasheets often specify about 1190 kg/mยณ. Use the materialโs datasheet when available.
