One of Over 700 Sites
	with Guide Bernhard Spang Bio | Contact

Subjects

Beginners CAD Software Career CFD Chemicals Corrosion Education Ethics Fluid Mechanics Fundamentals Heat/Mass Transfer Humor Job Market Job Search Journals Labware Mailing Lists Materials Measurement Units Numerical Methods Particle Tech. Process Control Process Economics Process Modeling Process Simulation Renewable Energy Safety Technical Writing Thermodynamics Thermo Software Subject Library  All articles on this topic

More Sites On This Topic

Apply to become a partner for this site.

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

Conversion Buddy
Free unit conversion program for Win 95/NT and Win 3.x. The Win 95/NT version includes Expression Buddy, a custom expression evaluator which calculates standard uncertainty.

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

Conversion of Units
Online conversion tool from the Department of Chemistry of the Berlin University. Mostly exotic units such as teaspoon (volume unit).

Convert
Excellent unit conversion program for Win 9x/NT, includes the ability to create custom conversions, freeware.

A Dictionary of Units
A summary of most of the units of measurement to be found in use around the world today, together with the appropriate conversion factors.

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

Favorite Mathematical Constants
Steven Finch's collection of mathematical constants from the old familiars such as Pi to some more esoteric constants such as Wirtinger-Sobolev Isoperimetric Constants.

Fundamental Physical Constants
From NIST, latest values of the constants and background information.

Guide for the Use of the International System of Units
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.

Measurement Conversion
Online conversion of common units: length, area, volume, mass, force, time, temperature, pressure, flow rate, and some more (JavaScript).

Oh, Those Confusing Gas Flow Units!
Tech tip by Anthony Herbert, Sulzer Metco, Inc. about the units used for gas flows and their conversion considering the standard conditions.

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.

OmniCon 98
Unit conversion software for Windows 95/98, and NT. Includes metric system, imperial system, US customary system, CGPM standard units and others. Free evaluation copy available for download. Full version costs $14.95.

This2That
Commercial unit conversion calculator software for Windows, restricted demo available for download.

Uncertainty of Measurement Results
From NIST, essentials of expressing measurement uncertainty.

Unit Conversion
Javascript utility for online conversion of length, area, volume, weight, pressure, speed, temperature, and time units.

UnitStar
Unit converter for Windows 3.1/95/98/NT, 450 measurement units grouped into 28 categories, many features, shareware.