Open Source PHP Calculators

phpipam is an open-source web IP address management application (IPAM). Its goal is to provide light, modern and useful IP address management. It is php-based application with MySQL database backend, using jQuery libraries, ajax and some HTML5/CSS3 features.

teemIP is an open source, web-based IP Address Management (IPAM) and DDI solution built on the iTop framework. It provides comprehensive IP management: IPv4/IPv6 plan management, subnet hierarchy, IP lifecycle, VLAN and DNS/DHCP integration. teemIP is now maintained by the teemIP SAS founding team: Christophe Naud (original creator), Martin de Laval and Quentin Ville. The company is being officially incorporated in July 2026. The project remains open source under AGPL v3. Professional support, integration services and subscriptions: https://www.teemip.com

A simple command to convert calendar dates to julian dates. Quite useful in timing situations where you need elapsed time between dates. Also useful for astronomy applications.

Breaks down the research process into pre-defined steps. Users enter a start date and end date for an assignment and the Assignment Calculator will compute the dates s/he needs to complete each step. Written by the University of Minnesota Libraries.

For arbitrary precision mathematics PHP offers the Binary Calculator which supports numbers of any size and precision, represented as strings. This project replicates this in JavaScript (bcadd, bccomp, bcdiv, bcmul, bcsub, etc)

This application is done for mobile phones, to sum all your consumption at the bar or the restaurant. Easylie increase or decrease your beverages or add new stuff.

BrewScript is a web application for helping homebrewers make all the necessary calculations for their brew day. The application is written primarily in JavaScript with some non-critical server-side PHP for data storage in MySql. Recipes can also be Imported and Exported via XML.

This website give informations about apparatus energy consumption and its environmental impact. The calculation can be used for whatever apparatus : fridge, freezer, tumble-dryer, dishwasher, bulb...).

The Grade Point Average Calculator is a web-based script that will calculate a grade point average based on the American system. Currently including calculation options for high school; middle shool and college versions are in development.

A PHP program that graphs in y= format. GD graphics library needed.

A simple on-line calculator for high mathematical problems Version 0.1 will be able to manage with matrixes

The Inc. Cybernations Calculator is the result of a year's worth of research and development by the Inc. team. Using this web-based calculator, users can get educated advice on how to grow their nation. Check the Wiki for installation instructions. Also

its a simple php scripte to calculate the love percentage between the two peaple.

Suite of small web apps: calendar, address book, RPN calculator, DVD title database, password wallet and a page for generally useful information. Includes a program to send email reminders of calendar events.

The Research Project Calculator allows students and teachers to create and track assignments to stay on schedule with research projects. Edit and share assignments, and receive email reminders for project milestones. http://rpc.elm4you.org

A web application for calculating PAX from a reasonably smart smartphone. This is pretty much for serious autox nerds only ;)

Various tools for the popular turn-based, browser-based, online massive multiplayer game "Star Fury". Features an advanced PHP-based attack and defense calculator, as well as other management tools still under development.

A basic stop smoking calculator that uses web technologies (PHP and MySQL) and create a profile for the user visiting the page.

This is a PHP driven web application which accepts user input of an IP address and a subnet mask, and then returns the network address, broadcast address and range of usable IP addresses based on the input.

Video bitrate calculator to provide quick calculation of bitrates for multimedia files for optimizing quality and filesize. PHP and X11/QT versions available.

Are you always tired of searching the Windows calculator from some weird location from you PC? Zinuc is a web only, very simple, but powerful calculator. You don't have to download anything to use it. Check out the web pages to find out more.

Two full-fledged classes dealing with dates (class cDate) and spans of time class cPeriod) written in PHP. The datecalc project is a sub-project of tbvs (http://sourceforge.net/projects/tbvs).

A php port of the solunar tables calculator. Calculates Solunar Tables for any position on earth. Solunar tables are used to predict the best days and times of day to go hunting and fishing.