I was calculating temperatures one day trying to figure out which heatsink/fan I should get for my computer processor and got tired of converting Celcius to Fahrenheit (and visa-versa) by hand. So I thought I would build a script to take the drudgery out of it. This JavaScript will generate temperature conversion tables using parameters you specify.

This JavaScript is just a simple checkbox calculator. Works great as a shopping cart. Values for the checkboxes are defined in the .js code.

Using basic theory and this calculator, you can quickly find the answers to your chemistry stoichiometry equations.

The function randInt(min, max) can be easily adapted for any application where you need to select a random integer within a certain range (i.e. from 1 to 100). The rest of the code is an example of how it can be used.

Change inches to centimeters and back using this short, sweet script. Very easy to use, just type in the number and click.

This calculator code can quickly determine the Greatest Common Factor and Least Common Multiplier between two or three numbers.

Use this JavaScript to help figure out your mortgage payments. It takes the percentage rate, principal and the length of the loan and produces a payment schedule.

A calculator code with memory screen, built-in help screens, and new window function.

Formats phone number to the standard (xxx)xxx-xxxx format. This JavaScript will first eliminate all non-numeral values and check to see whether the value is a valid 10 digit long phone number. If it is, the number is formatted with the parenthesis and the dash and returns the value to the phone number textbox. If less than 10 numbers, a blank value is returned and an error message shows up.

Provides all the basic functions, including finding the square root. A small but powerful script.