This tool converts volume fractions to weight fractions (and vice versa) and calculates the overall density of a composite. Simply click and enter in one of either the reinforcement or matrix volume fraction or weight fraction (in %) and both reinforcement and matrix densities (in g/cm3) and click calculate. We have provided some approximate density data for common reinforcements and matrix materials for reference purposes.
Reinforcement Density (g/cm3)
E-Glass 2.56
Carbon 1.75-1.95
Aramid (Kevlar 49) 1.45
Matrix Density (g/cm3)
Epoxy 1.1-1.4
Polyester 1.2-1.5
Polyamide (Nylon 6.6) 1.14
Polypropylene 0.9
PEEK 1.26-1.32
