MATDAT
MATDAT is the QinetiQ polymer composite materials database, which is a DTI supported web tool produced by QinetiQ Ltd.
MATDAT enables you to interrogate the physical and mechanical properties of polymer composites or to compare different materials using a wide range of criteria. You may also search for composites using specific performance or manufacturing requirements.

Measurement advice
Measurement Advice is a DTI supported web-site produced by NPL. The aim of Measurement Advice is use NPL's extensive knowledge of the behaviour of polymer composites to help users undertake cost effective characterisation and performance assessments. Advice is provided using a standards selector tool, also on experimental techniques and associated issues including training.

VIRCON
VIRCON is a DTI funded web-site produced by MERL Ltd and RAPRA Technology Ltd. The aim of the VIRtual CONsultant is to provide information on all aspects of polymer composites. This information is primarily intended to help support UK based SME's who either use or intend to use polymer composites.

Project Explorer
Project Explorer is part of the Materials Solutions portal (polymer composites) and is a DTI supported web-site produced by Trend 2000 Ltd. Project explorer has been developed to allow you to select and view specially developed summaries of DTI supported research projects providing information specific to your interests or job function.

MatWeb
Free materials database with data on over 24,000 materials including metals, plastics, ceramics, and composites.

Composite Materials Handbook
The Composite Materials Handbook provides information and guidance necessary to design and fabricate end items from composite materials. Its primary purpose is the standardisation of engineering data development methodologies related to testing, data reduction, and data reporting of property data for current and emerging composite materials.

About.com Composite Materials
Comprehensive guide to composites resources on the web

Calculator tools

5 free online tools which calculate and convert weights and materials:

Resin Formula Calculator
Calculates the overall density and price of a resin system

Roving Linear Weight Converter
Converts between commonly used units for the linear weight of a roving

Material Areal Weight Converter
Converts between commonly used units for the areal weight of a fabric

Density Tool
Converts between commonly used units for density

Volume-Weight Fraction and Density Calculator
Converts volume fractions to weight fractions and calculates the overall density of a composite.