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Measurement Units - ChE Links

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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 Factors
From Process Associates of America, conversion factors for basic physical quantities and quantities used in chemical engineering.

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.

A 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.

Guide for the Use of the International System of Units (SI)
Everything you need to know about SI. A NIST special publication, available as PDF file for download.

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.

OMDI Unit Calculator
Unit conversion program for the Power Mac which supports drag and drop. Though not free there is a fully functional, time limited demo available.

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.

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 ESSCo. Commercial Windows API and COM versions for embedding unit conversions in user applications are also available.


By: Dr. Bernhard Spang, Associate Content Writer (read the author's Profile)


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