Calculators

Enter the number of bills and coins and this script will calculate the total amount of money you have. All blank entries are ignored. Input field validation is also included -- try entering a non-digit into a field. Also, this script is a good demonstration of a JavaScript return function in use....
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This Dreamweaver Extension inserts a javascript Calculator at cursorpoint in your site

Have you ever wondered if your phone number has a memorable text equivalent, like 555-HELP? Just type it in and this script will generate all possible combinations, just pick your favorite one and tell the world how to reach you.

Besides a very organized Periodic Table, this script will tell you lots of information about any periodic element you click on.

One of geometry's most useful formulas, the Pythagorean Theorem, can be applied to the numbers you enter in JavaScript! Just enter 'A' and 'B' and the script solves for 'C.'

This is a DHTML calculator with error checking. Definitely more stylish than the traditional JavaScript calculator, if nothing else.

Microsoft's Windows Calculator look-alike. This JavaScript calculator supports all the standard calculations, plus memory operations. It also features number base conversions and calculations. Included are basic help files.

Compact and handy RPN (reverse polish notation) calculator with 99 stacks, all essential functions and userdefined variables. Runs in all browsers supporting javascript and can be opened in popup windows. The variables are stored in cookies to be resumed on restarting the calculator. RPNcalculatur can be handled completely using the keyboard and so enables a minimal size. A public help-forum is provided....
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Here's a useful tool you can use to calculate your PayPal fees. It includes many advanced options such as choosing the source and destination countries, choosing which PayPal Fee Rate you want to use, and choosing whether or not to include the 2.5% currency conversion fee (for multiple currency transactions). You can also use it to "reverse" calculate your PayPal fees to determine exactly how much a person should send you so that after fees are removed you actually end up with the amount you want. I use it all the time myself when I'm selling on eBay, and I'm trying to gauge that "magic" amount to charge so that after all fees have been removed I actually end up with the amount I want. For example, did you know that to actually receive $75 in your PayPal account someone would have to send you exactly $77.55? And the way you can find out that exact amount is by using a "reverse" paypal calculator such as this. Saves me a lot of time! Hope it will for you too. Any feedback, comments, and suggestions are welcome. Please vote if you find this useful....
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This is a calculator that you can put wherever you want (whichever one you want) Because its a series of 4, +,-,*, and /. its version 1.0 so there may be a few problems.

The Gas Calculator will allow you to figure out your Actual Gas Mileage per Gallon along with how much you spend to drive 50, 100 and 150 Miles.

Easily convert more than 700 units and unit combinations in 20 categories. Available categories are: temperature, number system (binary, octal, decimal,...), angle (deg, rad,...), length, area, volume, time, frequency, speed, acceleration, mass, density, force, moment, force per length & area, power, energy, mass- & volume flux. UnitConverter can be started within a popup-window in your browser. The code is well documented and it is easy to add your own categories and units. A public help-forum is provided....
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Just enter the birthday you wish to track and JavaScript will display the person's age, down to the second. Displays your age along with the day you were born. Great!

Enter the mother's pregnancy information into this calculator and this JavaScript will provide an estimated conception date, birth due date, and an estimated current fetal age. Great for all those mothers-to-be!

Use JavaScript to calculate compund interest. Warns about doubtful data.

Script can help you figure how many calories you have burned.

JavaScript can help you figure the circumference of a circle when you enter the radius.

A simple calculator to determine the area of a square, triangle, rectangle, circle or sphere.

Can't remember the formulas for the other two parts of a circle (area, diameter, or circumference) when you only know one? To the rescue is Circle Solver. Enter the circle area, diameter, or circumference and it will solve for the other two! Great!