A Dictionary of Units of Measurements  

From the University of North Carolina, this unique site includes:
The International System (SI), broken down into:
SI Base (Fundamental) Units
SI Derived Unitsand, and,
SI Units for Clinical Data in Medicine.

The English Customary Systems
The Metric System
The Metric System in the United States. There are also many unique tables of quantified parameters such as:
Apgar scoring (newborns)
Beaufort scales (wind speed)
Bushel weights (U.S.)
Cotton bale weights
Danjon scale (lunar eclipse brightness)
Drought severity (U.S.)
Fujita scale (tornados, U.S.)
Glasgow coma scale
Grit sizes
Hat sizes
Mercalli scale (earthquakes)
Nutritional daily values (U.S.)
Paper sheet sizes: British ISO, and U.S.
Radiocarbon year conversion
Saffir-Simpson scale (hurricanes, U.S.)
Sheet metal gauges
Shotgun gauges
Solar flare intensity
Tennis rcquet gauges
Tropical cyclone categories (Australia)
Viscosity grades (ISO)
Volcanic Explosivity Index
Wind chill chart (U.S.)
Wire gauge table (U.S./U.K.)

More are added regularly.

This site also feature very useful explanations and details on using numbers and units, Roman and Arabic numerals, names for large numbers and symbols and abbreviations used for various units.

Added on: 28-Jun-2004 | hits: 1188 | Rating: 10 (1 Vote)

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Astronomical Coordinates Converter  

This tool transforms a set of input coordinates into the following coordinate systems:(NASA LAMBDA Project)

* Celestial
* Ecliptic
* Galactic
* Super Galactic
* HEALPix pixel number

The input coordinates may be in Celestial, Ecliptic, Galactic, or Super Galactic coordinate systems.

Added on: 08-Oct-2006 | hits: 809
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Astronomical Time Converter  

At the NASA LAMBDA Project website - This tool transforms a time specification into the following formats:

GMT in the American Date Format
GMT String
Julian Day
Reduced Julian Day
MAP Reduced Julian Day
MAP Time-Ordered Data Timestamp

The input time may be in any of these formats. See the converter for descriptions of the different formats.

Added on: 16-Oct-2006 | hits: 830 | Rating: 10 (1 Vote)

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Basic photometric quantities 

From the Gigahertz Optik website: (QUOTE)

One of the central problems of optical measurements is the quantification of light sources and lightning conditions in numbers directly related to the perception of the human eye. This discipline is called Photometry, and its significance leads to the use of separate physical quantities, which differ from the respective radiometric quantities only in one respect:...the photometric quantities represent a weighted sum with the weighting factor being defined by either the photopic or the scotopic spectral luminous efficiency function

(UNQUOTE)
Added on: 30-Jul-2008 | hits: 471
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Basic radiometric quantities 

From the Gigahertz Optik website: (QUOTE)The whole discipline of optical measurement techniques can be roughly subdivided into the two areas of photometry and radiometry. ...Radiometry deals with the measurement of energy per time or power, given in watts, emitted by light sources or impinging on a particular surface. Thus, the units of all radiometric quantities are based on watts (W).(UNQUOTE)
Added on: 23-Jul-2008 | hits: 485
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CODATA Fundamental Physical Constants  

Information on the foundation of modern science and technology from the Physics Laboratory of NIST. NIST Standard Reference Database 121; Last updated February 2006.
Added on: 12-May-2006 | hits: 792
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COMMON WEIGHTS & MEASURES FOR TRAFFIC - COMMERCE STANDARDS  

A very unusual and basic website that has a home page consisting of links to a large number of webpages each containing some very detailed and very much unused measurement terms and conversions, such as:

Common Sexagesimal Measure (Year of 2800 B.C.)
The Britains Pharmacopoeia Measure (January 1st 1826)
Napoleon Emperor's Republic of Europe Decadent Decagesimal Measure (Years of 1804 to 1929)
(Reaumurgrade) 1st 2nd 3rd 4th 5th Directorate Republic of France Temperature Scale (Yr.1795)

It continues much further ending with the following attribution:

LEATHER SEALER
RORY ELY COLE
LEATHER SEALER'S OFFICE
TOWN OF LONDONDERRY
COMMONWEALTH OF VERMONT
UNITED STATES OF AMERICA
SATURDAY, APRIL 8TH 1826

Added on: 19-Dec-2006 | hits: 721
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Conversion Calculator(568Kb download)  

This program, hosted in the Philadelphia ISA Section website (www.isa-philly.org/), allows one to perform conversions of distances, pressure, force, mass, temperature, torque, volume, and several other parameters with just a few clicks of a mouse!!. Submitted by Sam Herb , a long-term member of the Section, (568Kb download)
Added on: 14-May-2006 | hits: 1016 | Rating: 10 (1 Vote)

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Conversion Calculators at PumpUniversity.com  

Use the conversion calculators to convert a unit into another unit.

Conversion calculators conversion for: Bernoulli's Equation, Dynamic Viscosity, Energy, Energy Calculation, Currency, Flow, Force, Hardness Table, Kinematic Viscosity, Length, Linear Velocity, Momentum Equation, Newton Viscosity, Plane Angle, Power, Pressure, Radial Forces, Surface Temperature, Time, Torque, Viscosity, Voltage Table, Volume and Weight

Published by:

Verder B.V.
Utrechtseweg 4A
NL-3451 GG Vleuten The Netherland

s Tel. +31 (0)30 677 92 11
Fax +31 (0)30 677 14 02
info@verder.nl
www.verder.nl

Added on: 11-Jun-2007 | hits: 930
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Conversion Factors  

These conversion factors were taken from a variety of sources. If you see Br, it means British and Fr it means French. We have tried to be as accurate as possible, but if you find any errors, please drop us a line.
Added on: 14-May-2006 | hits: 917
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