Fundamental Physical Constants app for iPhone and iPad

Fundamental Physical Constants covers not only the full range of fundamental constants but also the SI and derived units and SI Prefixes.
All fundamental constant values including exponents can be accurately copied into a scientific calculator making Fundamental Physical Constants easy to use for accurate calculations while working in the laboratory.
The values used in Fundamental Physical Constants are the latest values of the basic constants and conversion factors of physics and chemistry recommended by the Committee on Data for Science and Technology (CODATA) for international use.
The Fundamental Physical Constants App has been developed by NPL, the UK’s National Measurement Institute. Established in 1900, NPL is a world-leading centre of excellence in developing and applying the most accurate measurement standards, science and technology available to humanity. For more than a century NPL has developed and maintained the UK’s primary measurement standards. These standards underpin an infrastructure of traceability throughout the UK and the world that ensures accuracy and consistency of measurement.
Always use multiple sources to check values used in calculations to ensure the highest level of confidence in results.