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      11 Jun
    Ajay S. Satpute

    Hi, I have started my own engineering consultancy in India. Converge Engineering Pvt. Ltd. For more information, please visit www.converge.net.in

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Chemical and Process Engineering Resources

ChE Links from Dr. Bernhard Spang

Measurement Units

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The Constants and Equations Pages

Huge collection of scientific constants and equations. The term constant" is conceived somewhat broad though. "


Conversion & Calculation Center

Measurement conversion, reference information and many calculators.


Conversion of Units

Online unit converter, many different units, also unusual ones.



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.


eFunda: Units and Constants

A lot of information about units and unit conversion; includes also constants, information about SI, and unit prefixes.


Fundamental Physical Constants

From NIST, latest values of physical constants and background information.


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).


International System of Units

From NIST, essentials of the SI, background, and bibliography.



A freeware units conversion program specifically for engineers, runs under Windows 9x/NT (or later), from Katmar Software.


Uncertainty of Measurement Results

From NIST, essentials of expressing measurement uncertainty.



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.


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).