Calculators
VeryInteresting Loan Payment Calculator
VeryInteresting is a simple loan payment calculator. If a user enters a loan amount, an interest rate, the length of a loan, and the payment frequency, the calculator will show the monthly payment and the total interest that will be paid if the loan is paid to term. For monthly payments, it will also show an amortization table. Supports British Pound Sterling and Japanese Yen symbols as well as US Dollars.
A simple and nice addition for realtors and mortgage loan sites, as well as those who finance vehicles, and so forth....

Geozip
Geozip is a Perl program for calculating the distance between two zip codes in the United States. The subroutines included in the code can be used to calculate any distance between latitude and longitude coordinates. The package includes data for the US, the script, including two subroutines, one gets the coordinates and city name, the other calculates the distance between two points. The result should have a precision of about 50 meters, because the calculation takes into account the fact that the earth is not a perfect sphere. A great program to integrate into ebusiness solutions, dating sites, or just as it is as a service to your visitors. Update: Now with PHP/MySQL routines!...
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The Engineering Units Conversion Calculator
This program allows users to convert units such as: Energy, Pressure, Volume, Density, Specific Volume, Specific Heat (Entropy), Enthalpy, Viscosity (absolute), and Coefficient of Heat Transfer....

The Fluid Flow Calculator
This calculator is used to calculate pipe friction losses for straight piping handling water and water with varying percentages of ethylene glycol. The calculator uses an algorithm developed from the basic principles of fluid mechanics. This calculator allows the user to input the fluid type, the fluid temperature, the flow rate, the pipe size, pipe length, and pipe material. The calculator then determines the velocity, the Reynolds number, the Moody friction factor, the pipe friction factor, the pipe head loss, and the pipe friction loss in PSI....

QuadraticOMatic
A simple quadratic equation solver. Very simple to set up and use. Just type in the numbers to get your quadratic equation, and click "Solve that puppy." You will then be given the roots of the equation even if the number i is involved....
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SFEBMIcalc
SFEBMICalc is a simple Body Mass Index calculator. If a user enters their height (in centimeters or inches) and their weight (in kilograms or pounds), the program will return their Body Mass Index. You can configure it so that either Pounds/Inches or Kilograms/Centimeters is the default, and even change the spelling of Centimeters if you like....

Compound Interest Calculator
Allow your visitors to calculate both continous compound and compount interest....

MetaboCalc
MetaboCalc is a calculator that uses the HarrisBenedict equation to determine your Resting Metabolic rate and, based on your lifestyle, approximately how many calories you burn per day. It also tells you your Body Mass Index....
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Percentage Calculator
This calculator will calculate percentages based on the numerical data entered. It has been designed so that you can copy, paste then bulk calculate the percentages in one go. A very practical script for people such as teachers....

Statistical Calculator
This calculator will calculate statistics on numerical data  minimum, maximum, mean, median, mode, percentage unique, range, standard deviation, quartiles and more... The latest version (version 2.0) has more statistical measures, greater accuracy (to 3 decimal places), a graphical display of the data, definitions of the statistical measures & comments on your data....

PERL Calculator
This is just a simple Calculator CGI script, to show an example using math simple functions....

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