Scientific Constants < Measurements and Units in the Yahoo! Directory

Astro-Physical Calculator
Features pre-programmed physical constants and astronomical data.
www.astro.wisc.edu/~dolan/constants/calc.html
eqndb
Offers a database of images and descriptions for physics I and II equations searchable by keyword or symbol.
www.eqndb.com
Fundamental Physical Constants
www.chemie.fu-berlin.de/chemistry/general/constants_en.html
Fundamental Physical Constants from the National Institute of Standards and Technology
Gives the values of physical constants, allowing users to covert between energy measurements and show the appropriate factors. Also includes searchable bibliography.
physics.nist.gov/cuu/Constants
Physical Constants and Astronomical Data
www.astro.wisc.edu/~dolan/constants.html

Yahoo! Directory