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.

This useful JavaScript calculator will tell you the degrees, Nautical Miles, Statute Miles, and Kilometers between your originating and destination airports. It's got a built-in database of over 150 of the most traveled airports! Very neat! I've given a copy to everyone I know who fly often.

Another script to makes the basic calculator.

Here is a really simple JavaScript calculator code - with just 5 functions! (Add, subtract, multiply, divide, and power) This example can help you see how JavaScript evaluates math functions! Check it out.

This is known as Kramer's Rule.

The code makes 5 random numbers.

This is an example of using the Array() object's own sort method to randomize itself. Very simple and clean.

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.

Put a calculator code on your page that can tell a visitor the area units of a Rectangle, Triangle, Parallelogram, aTrapezium or a Circle.

Vitaliy's Math Javascript Library - is the collection of mathematical routines not included in JavaScript built-in objects (Math, Number) . The tool on this page is used to demonstrate how these functions work. This is still a beta version of the library, since testing is not complete yet.