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Chemical and Process Engineering Resources

ChE Links from Dr. Bernhard Spang

Measurement Units

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

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.

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

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

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/