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Calculators - Free CGI and Perl Scripts

A selection of free CGI and Perl scripts for calculators.

Quadratic-O-Matic - Quadratic Equation Solver

Quadratic-O-Matic is about the simplest program imaginable to set up and to use. You simply call the program up in your web browser, type in the numbers to get your quadratic equation, and click "Solve that puppy." You will then be given the roots of the equation.
Requirements: Perl 5.000 or higher
Version: 1.0

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MetaboCalc - Metabolism Calculator

MetaboCalc uses the Harris-Benedict equation to give you an approximation of how many calories you burn per day and at rest. It shows the base number, and also plus and minus 5% and 20% due to errors inherent in that equation. Basically, this calculator is intended to show your RMR (Resting Metabolic Rate) or BMR (Basal Metabolic Rate). Actually, BMR and RMR are slightly different, but they're often referred to as the same thing. When setting up the calculator, you can choose how to configure the user's height (in centimeters or inches) and their weight (in kilograms or pounds), You can also configure it so that either Pounds/Inches or Kilograms/Centimeters is the default, and even change the spelling of Centimeters if you like.
Requirements: Perl 5.000 or higher
Version: 1.0

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SFEBMIcalc - Body Mass Index Calculator

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.
Requirements: Perl 5.000 or higher
Version: 1.0

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PayBackTime - Loan Payoff Time Calculator

PayBackTime is a simple interest loan calculator, focused on determining how long it will take to pay off a loan or credit card, given a minimum payment, balance, and interest rate. The results will show the time it will take to pay off the balance with that monthly payment, number of payments, and the total interest the user will end up paying. For illustration purposes, it also shows the same data based on a bi-weekly payment of half the amount of the monthly payment.
Requirements: Perl 5.000 or higher
Version: 1.1

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AffordaBilly - Loan Calculator

AffordaBilly is a simple interest loan calculator, focused on determining how large a loan the user can afford, given an interest rate and length of the loan in years. Users can choose monthly or bi-weekly payments. The results will show the maximum amount of a loan that the user can afford based on the monthly payment and interest rate.
Requirements: Perl 5.000 or higher
Version: 1.0

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VeryInteresting - Loan Payment Calculator

VeryInteresting is a simple loan calculator script. 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. If your local currency is not "dollars," you may choose from £, ¥, and ¢ for the symbol to show after monetary amounts.
Requirements: Perl 5.000 or higher
Version: 1.5

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