Calculate ABS plastic weight from density, shape, and dimensions for sheets, blocks, round rods, and round tubes in lb, kg, g, or oz.

Estimate mass from solid volume. Density varies by ABS grade.

Optional settings

Blank uses 1.04 g/cm³. Enter your grade’s measured density for a closer estimate.

ABS Weight Formulas

The following formulas are used to calculate the weight of ABS in different shapes.

ABS Flat Sheet Weight Formula = L * W * T * d

ABS Round Bar Weight Formula = pi * D^2/4 * L * d

ABS Round Hollow Tube Weight Formula = pi * (R^2-r^2) * L * d

Variables used in these equations: 

  • L is the length
  • W is the width
  • d is the density
  • D is the diameter
  • T is the thickness
  • R is the outer radius
  • r is the inner radius

The calculator converts each dimension to meters and density to kg/m³ internally. Dimensions accept inches, feet, millimeters, centimeters, or meters. Optional density accepts lb/in³, g/cm³, or kg/m³; blank uses an approximate 1.04 g/cm³. Mass results accept lb, kg, g, or oz. All equations use consistent units.

What is the density of ABS?

A reference density for standard ABS is approximately 1.04 g/cm³ (1040 kg/m³), as listed for Ensinger TECARAN ABS grey. Density varies by grade and additives; use your supplier’s value when available.