website introduction：Provides free online conversion tools, which can be added to any websites. It also offers metric conversion tables for download and print.
website introduction：USA. Federal agency, cooperating with industry to develop and apply technologies, measurements, and standards.
website introduction：Offers conversion tools for length, volume, temperature, astronomical, clothing sizes, computer bytes, cooking measurements, time zones, density, energy, finance, flow rates, force frequency, and some fun pages.
website introduction：Interactive calculators used to for converting between currencies, weight, volume, mass, time, distance and more.
website introduction：Provides a free online conversion tool to easily convert between different units of measurement in more than 70 categories.
website introduction：International organization within which governments and the private sector coordinate global telecom networks and services.
website introduction：ASTM develops technical standards for industry worldwide.
website introduction：Includes online conversion and calculation tools. Possible to change the precision of the result.t.
website introduction：Online conversions for many measurement systems.
website introduction：Offers a wide variety of unit conversion tools and conversion charts for fast lookup.
website introduction：Provides unit conversion tools for various math and physical units in different languages. Easy conversion of length, area, volume, weight, temperature, time, angle, speed, storage size, number systems, charge, energy, power and pressure units.
website introduction：Publishes fire and building safety standards including the National Electrical Code.
website introduction：National Electrical Code explanations, training and tips. Includes downloadable resources and a forum.
website introduction：Governmental agency dedicated to the promotion of Singapore's economic growth and productivity; statistics and information on services and products.
website introduction：Information about electric, electronic and electrotechnical international standards, compliance and conformity assessment for electronics and electronic equipment, and international electrical standards information.
website introduction：Online reference collection used by applied scientists and practicing engineers to quickly locate technical information.
website introduction：The production of technical specifications for a third generation mobile system based on the evolved GSM core networks.
website introduction：Promotes the innovative application and use of information systems and information technology in further and higher education. Lists opportunities, funding, issues and contact details.
website introduction：A non-profit making organization whose mission is to produce the telecommunications standards that will be used throughout Europe and beyond.
website introduction：ANSI promotes voluntary consensus standards and conformity assessment systems in the U.S. and is the US member body to ISO and represents US interests to ISO and IEC.
website introduction：Information about standardization activities and training/certification services. In French and English.
website introduction：Information and regulation concerning standards in Iran. [English, Farsi]
website introduction：Spanish Association for Standardisation and Certification. Information on standards, training and other services.
website introduction：leader in the development and dissemination of voluntary, consensus-based industry standards
website introduction：Converts area, density, energy, force, length, mass, power, pressure, speed, temperature and volume, bits and bytes.