Welcome to ChE Links from Dr.
Bernhard Spang. Dr. Spang has brought this extensive collection of chemical
engineering links from his site at About.com. We're happy to have this collection
now available on The Chemical Engineers' Resource Page.
Bureau International des Poids et Mesures
Metric conversion charts, information on metric standards and the current time as well as an overview and history of The International System of Units (SI).
http://www.bipm.fr/en/home/
Conversion & Calculation Center
Measurement conversion, reference information and many calculators.
http://www.convertit.com/Go/ConvertIt/
Conversion of Units
Online unit converter, many different units, also unusual ones.
http://www.chemie.fu-berlin.de/chemistry/general/units_en.html
Convert
Unit conversion program for the most popular units of distance, temperature, volume, time, speed, mass, power, density, pressure, energy and many others, includes the ability to create custom conversions, freeware for Windows 95/NT 3.51 or later.
http://joshmadison.net/software/convert/
Dictionary of Units
Summary of important measurement units and factors for converting to SI-units.
http://www.cleavebooks.co.uk/dictunit/index.htm
eFunda: Units and Constants
A lot of information about units and unit conversion; includes also constants, information about SI, and unit prefixes.
http://www.efunda.com/units/index.cfm
Fundamental Physical Constants
From NIST, latest values of physical constants and background information.
http://physics.nist.gov/cuu/Constants/index.html
How Many?
From Russ Rowlett, University of North Carolina, a comprehensive dictionary of units of measurement covering the English customary systems, the metric system, and the International System of Weights and Measures (SI).
http://www.unc.edu/~rowlett/units/
International System of Units
From NIST, essentials of the SI, background, and bibliography.
http://physics.nist.gov/cuu/Units/index.html
OmniCon
Unit conversion software for Windows 98/ME/NT/2000. Includes metric system, imperial system, US customary system, CGPM standard units and others. Free evaluation copy available for download. Full version costs US$16.95.
http://members.execulink.com/~pjones/
The Constants and Equations Pages
Huge collection of scientific constants and equations. The term "constant" is conceived somewhat broad though.
http://www.scenta.co.uk/tcaep/science/index.htm
Uconeer
A freeware units conversion program specifically for engineers, runs under Windows 9x/NT (or later), from Katmar Software.
http://www.katmarsoftware.com/uconeer.htm
Uncertainty of Measurement Results
From NIST, essentials of expressing measurement uncertainty.
http://physics.nist.gov/cuu/Uncertainty/index.html
WinUnit
Free unit converter for Windows platforms from Apricot Software. Commercial Windows API and COM versions for embedding unit conversions in user applications are also available.
http://www.unit-conversion.com/winunit.aspx