Abbe number calculator  

The Abbe number, or V-number or constringence of a transparent material, is a measure of the material's dispersion (variation of refractive index with wavelength) in relation to the refractive index. A calculator created by Mikhail Polyanskiy using the optical refractive index data from his web database at RefractiveIndex.INFO that covers many glasses, crystals, plastics, liquids and more.
Added on: 10-Sep-2008 | hits: 1025
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Advanced critical angle calculator  

The critical angle is the angle of incidence above which the total internal reflection of an incident ray of light occurs when the light passes from one optical medium into another. Optical properties are used from the online Refractive index database at RefractiveIndex.INFO for a wide range of materials including glasses, crystals, liquids, liquid crystals and some gases, created by Mikhail Polyanskiy .
Added on: 09-Sep-2008 | hits: 1552
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Aerospace Calculators  

The Aerospaceweb.org calculators section includes a series of useful scripts for computing aerodynamic and atmospheric properties.

Atmospheric Calculator
Handy script for computing properties of the atmosphere, Reynolds numbers, airspeeds, basic aerodynamic values, and other useful quantities.

Compressible Flow Calculator
Another script for computing supersonic flow properties using isentropic, normal shock, and oblique shock relations.

Added on: 07-Mar-2005 | hits: 1223 | Rating: 10 (1 Vote)

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AngioCalc  

AngioCalc is dedicated to providing quality resources for the management of cerebral aneurysms and features an online calculator that calculates cerebral aneurysm volume and percent packing volume after coil embolization.
Added on: 01-Jan-2010 | hits: 786
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Body Mass Index (BMI) Calculator  

From the AARP Website:(QUOTE)Your body mass index (BMI) is an estimate of your body fat that is based on your height and weight. Doctors use a BMI, along with other health indicators, to assess an adult’s health and potential health risks.Founded in 1958, AARP is a nonprofit, nonpartisan organization that helps people 50 and over improve the quality of their lives. Visit them online at www.aarp.org
Added on: 07-Jun-2011 | hits: 880
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Bolt Torque Calculator - Online  

Calculates recomended torque of bolts depending on their type, size and material for both American, Sizes No. 0 thru 2 3/4 inch, and Metric bolts from 1.6 to 36-4 diameters and custom sizes for several materials such as steel, stainless steel and specific aluminum alloys. Also includes a feature to calculate torque for yield data of custom materials. on the Futek Advanced Sensor Technology, Inc.websites
Added on: 23-Feb-2007 | hits: 1955
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Brewster's angle calculator  

Calculates the S- & P- optical polarization reflection coefficients for any pair of materials, including Air , plots the two coefficients versus the angle of incidence of and produces the Brewster angle between them.
Added on: 07-Sep-2008 | hits: 984
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Brinell Hardness Number Calculator  

The diameter of the impression is the average of two readings at right angles and the use of a Brinell hardness number table can simplify the determination of the Brinell hardness. A well structured Brinell hardness number reveals the test conditions, and looks like this, "75 HB 10/500/30" which means that a Brinell Hardness of 75 was obtained using a 10mm diameter hardened steel with a 500 kilogram load applied for a period of 30 seconds

Gordon England
Independent Metallurgist and Consultant to the Thermal Spray Coating Industry
Kingfishers, Folly Lane North
Upper Hale, Farnham
Surrey, GU9 0HU England

Tel: +44 (0) 1252 405186
Fax/Voice Mail: +44 (0) 1252 713343
Mobile: 07951 120293
Email: tsc@gordonengland.co.uk
Web:www.gordonengland.co.uk

Added on: 14-Jul-2007 | hits: 1173
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Calculator City  

Basic math & science calculators from 1728 Software. These include calculators for: CONVERTERS ULTRA CALCULATORS FINANCIAL CALCULATORS GEOMETRY CALCULATORS ALGEBRA CALCULATORS TRIGONOMETRY CALCULATORS CALCULUS CALCULATORS ASTRONOMY CALCULATORS CHEMISTRY CALCULATORS PHYSICS CALCULATORS GRAMMAR SCHOOL MATH
Added on: 03-Mar-2005 | hits: 1695
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Calculator for Conversion of Vickers Hardness Number  

There is now a trend towards reporting Vickers hardness in SI units (MPa or GPa) particularly in academic papers. Unfortunately, this can cause confusion. Vickers hardness (e.g. HV/30) value should normally be expressed as a number only (without the units kgf/mm2). Rigorous application of SI is a problem. Most Vickers hardness testing machines use forces of 1, 2, 5, 10, 30, 50 and 100 kgf and tables for calculating HV. SI would involve reporting force in newtons (compare 700 HV/30 to HV/294 N = 6.87 GPa) which is practically meaningless and messy to engineers and technicians.

Gordon England
Independent Metallurgist and Consultant to the Thermal Spray Coating Industry
Kingfishers, Folly Lane North
Upper Hale, Farnham
Surrey, GU9 0HU England

Tel: +44 (0) 1252 405186
Fax/Voice Mail: +44 (0) 1252 713343
Mobile: 07951 120293
Email: tsc@gordonengland.co.uk
Web:www.gordonengland.co.uk

Added on: 19-Jul-2007 | hits: 1046
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Calculator.com  

Calculator.com was founded in January of 1996 to create a new class of research and information products in the form of online calculators. It is the leading online calculator portal with calculators spanning over 120 categories and sub-categories. All of their calculators are specific to something that someone is interested in. Apart from two calculators, a general scientific and a general numeric calculator, all pinpoint the user’s interest by definition. Examples: o Tiling a floor o Brewing beer o Cooking o Mortgages o Investments Calculators are available in the following areas: Agricultural Automobile Brewing Clothing College Computing Converters Cooking Design Distance Engineering&Finance Fun Health Manufacturing Numeric Personal Photography Pricing Scientific Sports Time
Added on: 03-Mar-2005 | hits: 1798
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Calculators Center  

MARTINDALE CALCULATORS ON-LINE CENTER

Currently the Calculators On-Line Center contains over 23,765 Calculators (On-Line) Calculators Businesses & Tax Supported Entities World Wide .

Including

SCIENCE AND MATH CALCULATORS

MATHEMATICS ~ STATISTICS
Added on: 11-Mar-2005 | hits: 789
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ClearSky Calculator 

The ClearSky Calculator is a free web-based tool that estimates the intensity of shortwave radiation under a clear sky, falling on the Earth’s surface at any time of day in any location around the world. The calculator is primarily used to determine the need for recalibration of solar radiation sensors.

by Apogee Instruments, Inc.

The calculator is found at www.clearskycalculator.com.
Added on: 19-Mar-2011 | hits: 471
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Constructive Reals Calculator   

This is a calculator that operates on constructive real numbers. Numbers are represented exactly internally to the calculator, and then evaluated on demand to guarantee an error in the displayed result that is strictly less than one in the least significant displayed digit. It is possible to scroll the display to the right to generate essentially arbitrary precision in the result.

This is a modified version of the constructive reals calculator developed by Hans-J. Boehm at SGI. The copyright for much of the code belongs to SGI. Since it appears to no longer be available on the SGI site, it was rehosted here (the HP Labs website), as allowed by its license.

The calculator is implemented on top of a Java library that implements constructive real arithmetic. The library will live in com.hp.creals.
Added on: 04-Mar-2009 | hits: 609
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CostMate™ - Injection Molding Part Cost Estimator  

From The Plastics Web at iDEAS (www.ides.com). IDES is a plastic materials information company with a vertical search engine for the plastics industry.

IDES Inc.
209 Grand Avenue.
Laramie, WY 82070 USA

Phone: 800-788-4668 or 307-742-9227.
Fax: 307-745-9339

Added on: 03-Jan-2006 | hits: 787
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CPU-Z - Freeware Gets Info on Devices in a PC Under Windows 

CPU-Z is a freeware that gathers information on some of the main devices of your system. CPU

* Name and number. * Core stepping and process. * Package. * Core voltage. * Internal and external clocks, clock multiplier. * Supported instructions sets. * Cache information.

Mainboard

* Vendor, model and revision. * BIOS model and date. * Chipset (northbridge and southbridge) and sensor. * Graphic interface.

Memory

* Frequency and timings. * Module(s) specification using SPD (Serial Presence Detect) : vendor, serial number, timings table.

System

* Windows and DirectX version.

Added on: 14-Aug-2007 | hits: 379
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Definition of Caratage in gold content  

Per the www.UtiliseGold.com website, by the World Gold Council

(QUOTE)Any caratage value lower than 24 is a measure of how much gold there is in the jewellery gold alloy... (UNQUOTE)

The table on this webpage gives the various caratages and their equivalent gold content in percent or in fineness terms as recognised by international standards.
Added on: 06-Mar-2008 | hits: 577
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Dirac Delta Consultants Ltd -Calculators 

A mind-boggling array of FREE, online Calculators at the Dirac Delta website.

Organised in alphabetical order by category they start, at A, of course, as follows:

Aerodynamics

Drag Coefficient A dimensionless value that allows the comparison of drag incurred by different sized and different shaped bodies. Kinematic Viscosity The dynamic viscosity of a fluid divided by the fluid density. Viscosity A measure of the internal friction within a fluid.

Architectural Acoustics

Acoustic Barriers An acoustic barrier between two rooms. Acoustic Cavity The acoustics of enclosed volumes are important when considering sound propagation within the volume. Cavity Acoustics The acoustics associated with enclosed volumes. Room Modes Frequencies at which sound waves in a room resonate (in the form of standing waves), based on the room dimensions. Sound Transmission Class In acoustics, a single number rating for describing sound transmission loss of a wall or partition.

Audio

And so on through S. There doen't seem to be any after that at present (Jan 2007)

You'll note that we feature a link to their website with a banner that displays periodically on our sites. The only quid pro quo is that they have a link to at least one of our sites there.
Added on: 02-Jan-2007 | hits: 450
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Directory of Open Access Journals (DOAJ) 

Free, full text, quality controlled scientific and scholarly journals, covering all subjects and many languages
Added on: 07-Oct-2011 | hits: 318
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efunda's Calculators  

The engineering fundamentals website (www.efunda.com) has a great resource in calculators. These include:

Financial Calculators

Loan Calculator
This calculator takes any two of the three variables (Loan, Interest Rate, and Number of months) and gives the answer for the remaining one. Lease Calculator Leasing a car? Confused about the money factor that car dealers always mention? We have a mathematical proof that relates money factor to the actual interest rate.

APR Calculator
So what is the difference between APR and the Interest Rate? This calculator gives a full definition of APR and helps you determine it for a given interest rate and points cost.

Currency Calculator
Updated daily, this calculator gives the extrange rates of more than 60 currencies and converts from one to another.

Engineering Design Aids

Unit Conversion Calculator
Featuring more than 800 units in our database (and growing), we give the unit definition and SI-dimensions in addition to converting from one unit to other units in the same family.

Fraction Calculator
Design engineers, ever wonder what the closest 32nd number is for a decimal fraction? This calculator tells you where your decimal fraction stands on the 1/8, 1/16, 1/32, and 1/64 scales.

Gage Calculator
There are so many systems for gaging wires and sheets. This calculator allows you to convert back and forth between gages and the actual decimal numbers in different standards.

O-Ring Calculator
This calculator outputs the O-Ring inner diameter and the range of O-Ring cross-section diameters that will meet user prescribed limits on groove and bore diameters and O-Ring compression.

Spring Calculators
Frustrated by reading spring catalogs trying to figure out which spring gives you the right force or displacement? Maybe one of these 8 calculators can help you. More calculators will be added soon! Hardness Approx. Converter This calculator explains and inter-converts comomonly used hardness scales, including Brinell, Knoop, Mohs, Rockwell, Shore, and Vickers.

Mechanical Formulas

Beam Calculators
Featuring 11 calculators that output the displacement, rotation, force, moment, and shear for beams with different boundary conditions under various loadings.

SDOF Vibration
This calculator returns the natural frquencies, damping ratio, and the closed-form solution for a Single-Degree-Of-Freedom mass-spring-damper system.

Reynolds Number
This calculator quickly gives you the Reynolds Number for a flow over a plate or a flow in a pipe.

Venturi Flowmeter
This calculator outputs the flowrate through a venturi constriction for a given pressure drop.

Pipe Friction
Frustrated by using the Moody Chart to calculate pressure loss in pipes? This calculator does it for you and tells you the Reynolds number, pressure drop, and flow rate for a constant cross-section pipe.

Radiation
Ever wonder how much heat per second is radiated from your (bald) head to the dark night sky if you are standing in an open field? You can use this calculator to figure that out! (Hint: It\'s about 10 watts if you are really bald!)

Laminar Flow Over Plate
Heat convection by forced laminar flow over an isothermal plate.

Stress Transforms
Remember Mohr\'s Circle? We provide calculators that execute the math behind Mohr\'s Circle for the cases of Plane Stress and Plane Strain.

Principal Stress
Need to find the principal stresses and their directions for a given input stress state? These calculators do the math for you for the case of Plane Stress and Plane Strain.

Elastic Constants
OK, we all remember that an isotropic material requires only 2 elastic constants to describe its material behavior. But which 2 constants to use? Youngs modulus, Poisson ratio, shear modulus, or bulk modulus? Don\'t sweat it anymore - this calculator allows you to convert from any 2 constants to all others in common use.

Failure Criteria
Remember how to apply von Mises and the Maximum Shear criteria to evaluate failure risk? How about Maximum Stress or Mohr\'s Theory? We encourage you to freshen up on the basics, but short of that here are 2 calculators for applying failure criteria to brittle and ductile materials.

Plate Calculators
Featuring 11 calculators that output the maximum displacement and stress for common plates with different boundary conditions under various loadings.

Composite Materials
3 calculators are provided to help determine the mechanical properties of the composite lamination with multiple layers.

First, the equivalent material constants of a single layer along the principal directions are estimated.
Then, the stiffness and compliance matrices of such a layer are constructed.
Finally, the laminae are \'glued\' together and the stiffness matrices A, B, and D of the laminate are built.

Pure Mathematics

Base-N Conversions
Converts integers expressed in one base to all other bases, up to base 36.

Gamma Function
This calculator evaluates the Gamma Function for a given argument. We don\'t know how useful this is, but then again, it is cool!

Gaussian Quadratures
Gauss-Legendre
Gauss-Hermite
Gauss-Laguerre
These calculators output the abscissas and weights used in Gaussian quadrature (a numerical integration technique).

Added on: 03-Mar-2005 | hits: 1882
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