Calculators

The Quadratic Equation Solver posted on this page solves for both real and imaginary (if applicable) results. Also on this site: solvers for the Cubic and Quartic equations, N Equations in N Unknowns, Eigenvalues and Eigenvectors, Cubic Spline Interpolation, Numerical Integration, and Least-Squares Data-Fitting.

A calculator script is a must for numeric input fields of financial web sites. The script will show a calculator icon next to such fields. Clicking the icon will show a simple keypad attached to the input field. The input field itself serves as the calculator display. No popup windows are used for the effect.

Advanced JS calculator- Features: Mixed fraction and decimal calculations Fraction calculations Standard calculator functions Number to powers function Digital Root LCM GCD LCD Square Root Big Number Calculations Prime number finder Quick - is divisible by - functions

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.

This script can be used to calculate the calorie and nutrient content of food items based on what a person has eaten. Great for dietitians to use when doing calorie counts or for monitoring dietary restrictions. This has been used to assist in calorie counts at a major institution, but can be used for many other things.

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.

BetterCalculator 1.2 is a good looking freeware Javascript calculator with MEMORY screen. Its homepage has been changed to www.crafterscalculator.co m and shows how to place this Calculator on your website or desktop. The calculator itself has also been revised. Features include: MEMORY screen, RECORD screen, NEW WINDOW function, Keyboard input capability, Built in HELP screens, LAUNCH button or graphic can be used on your site.

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.

Tigra Calculator PRO is flexible JavaScript calculator offering high reliability and wide browsers support. This script allows your visitors to perform necessary mathematical calculations quickly and easily without any additional means. Result is returned in single form field with user defined name. Tigra Calculator PRO suits well for applications where quick arithmetical calculations are required. Script setup will take 5 minutes in most cases.

An interesting script for converting between integers and Roman Numerals, as well as checking the validity of Roman Numerals for common mistakes.

JavaScript can help you find acceleration equivalents.

Scientific calculator with memory, date, time, currency converter, and scientific functions. This version has 50 buttons and three lcd-style displays. The Carpe calculator ZF can be used by just opening a link, as a bookmarklet or it can be customized and implemented in your web site.

By this calculator, medical professionals and health care providers enter the newborn's findings at 1 and 5 minutes, to get Apgar scores at the corresponding times and the indications of both. Webmasters can include this calculator in their medical website for free.

Very usefull control for currency input with PopUp calculator. This control is based on JavaScript code and was tested on Netscape and IE platforms. It is fully customized through CSS file.

By this calculator, parents and health care providers can assess and track their baby's growth at home or at hospital. Infant percentile calculator is one easy calculator that replaces 10 growth charts. Just enter your infant's measurements to automatically obtain all his weight, height, and head circumference percentiles by one click. Webmasters can include this calculator in their health related website for free.

Use this practical script to easily convert between the 7 most popular length units- centimeters, meters, kilometers, miles, inches, feet and yards. Simply enter a number, and let the script display the desired equivalents.

This script displays the deaths caused by 69 different causes happening right now in realtime all over the world. Easy configuration of death-causes, background-color and font-attributtes. Internet Explorer 5x/6x/7x/8x/9x, Firefox 2x/3x and Opera 6x/7x/8x/9x/10x/11x, Chrome 3x/4x/5x/6x/7x/8x.

A nice utility for genealogy sites to offer to their visitors who do census record searches. This Convenient SoundEx generator form may be displayed inline with your page content or you may provide a link to let your visitors pop it up into a small window. The form displays both the normal census codes as well as special census codes (produced in some censuses prior to 1920) simultaneously as the user types the word. A great (and free) little widget to offer to your genealogy site visitors.

Tigra Calculator PRO is flexible cross-browser JavaScript calculator supporting customizable layout, configurative mathematical function set and lots of other valuable features.

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.