Calculate HDPE sheet, bar, tube or pipe weight in lb and kg from its dimensions, using typical HDPE density, UHMW or LDPE presets, or your own density.
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HDPE Weight Formulas
The following formulas are used to calculate the weight of HDPE in different shapes.
HDPE Flat Sheet/Square Bar Weight Formula = L * W * T * d
HDPE Round Bar Weight Formula = pi * D2/4 * L * d
HDPE Square Hollow Tube Weight Formula = [W2-(W-2T)2] * L * d
HDPE Round Hollow Tube Weight Formula = pi * (OD2-ID2)/4 * L * d
HDPE Square Angle Weight Formula (equal-leg) = (2*W*T – T2) * L * d
HDPE T Bar Weight Formula = (W*T1 + (H-T1)*T2) * L * d
HDPE C Channel Weight Formula = (2*W*T1 + (H-2*T1)*T2) * L * d
Variables used in these equations:
- L is the length
- W is the width (or outer width / flange width / leg length, depending on shape)
- H is the overall height (for T bars and C channels)
- d is the density
- D is the diameter (round bar)
- T is the thickness (sheet thickness, wall thickness, or angle thickness, depending on shape)
- OD is the outer diameter (round hollow tube)
- ID is the inner diameter (round hollow tube)
- T1 is the flange thickness (T bars and C channels)
- T2 is the web thickness (T bars and C channels)
Select each input unit explicitly. The calculator converts in, ft, cm or m to inches and lb/inยณ, g/cmยณ or kg/mยณ to lb/inยณ internally. It assumes constant density and section, square corners for nonround shapes, and no fillets, holes or fittings.
What is the density of HDPE?
A rough illustrative density range for HDPE is about 0.034โ0.035 lb/inยณ (approximately 0.94โ0.97 g/cmยณ); actual density depends on the grade. The calculator defaults to an assumed 0.0343 lb/inยณ (about 0.9494 g/cmยณ). Pick UHMW-PE or LDPE, or choose Custom density and enter your supplierโs value, for a more suitable estimate.
