Open Source JavaScript Calculators
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JavaScript Calculators
View related business solutionsBrowse free open source JavaScript Calculators and projects below. Use the toggles on the left to filter open source JavaScript Calculators by OS, license, language, programming language, and project status.
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phpipam
phpipam open-source IP address management
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. -
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teemIP - CMDB & DDI solution
teemIP : Open source IPAM & DDI solution with CMDB integration.
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 -
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Nano ID
A secure, URL-friendly, unique string ID generator for JavaScript
Nano ID is a library for generating random IDs. Likewise UUID, there is a probability of duplicate IDs. However, this probability is extremely small. Meanwhile, a lot of projects generate IDs in small numbers. For those projects, the ID length could be reduced without risk. This calculator aims to help you realize the extent to which the ID length can be reduced. Instead of using the unsafe Math.random(), Nano ID uses the crypto module in Node.js and the Web Crypto API in browsers. These modules use unpredictable hardware random generator. Uniformity, random % alphabet is a popular mistake to make when coding an ID generator. The distribution will not be even; there will be a lower chance for some symbols to appear compared to others. So, it will reduce the number of tries when brute-forcing. Nano ID uses a better algorithm and is tested for uniformity. -
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pretty-ms
Convert milliseconds to a human readable string
pretty-ms is a JavaScript utility for converting millisecond values into compact, human-readable durations. It accepts both numbers and BigInt values and automatically breaks durations into appropriate time units. Developers can choose concise output, full unit names, or digital-clock-style colon notation. Precision controls determine how seconds and milliseconds are rounded and displayed. The package can expose microseconds and nanoseconds for sub-millisecond values and can represent sub-second durations as decimal seconds. Options also let applications limit the number of displayed units or hide particular duration components. It is useful for timers, benchmarks, progress indicators, logs, and other interfaces that need readable elapsed-time values. -
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"A basic numerology calculator in JavaScript" A live demo is available at: https://pythagorean-numerology-calc.sourceforge.io/pnc.html Features: -Your connection with the 4 classic elements -Numerology chart calculation -Master numbers detection -Psychologic matrix chart calculator -Name calculation chart -Personal day calendar -Plain calculator for names or numbers -Name diagrams (Norman Shine) -Profiles manager -Unlimited number of profiles -Search and sort feature to find profiles easily -Small help section -Ability to save/export calculations, profiles, and charts -Runs offline as well as online
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APK SHA-256 Verifier
Private, browser-based SHA-256 checksum calculator for APK files
APK SHA-256 Verifier calculates and compares SHA-256 checksums entirely in the browser. Selected files remain on the device and are processed in 4 MB chunks; no upload or account is required. Paste an expected 64-character digest to receive match, difference, or invalid-format feedback, or compare two existing hashes without loading a file. A matching checksum confirms byte-for-byte identity with the reference, but it does not prove an APK is safe or authentic. The project includes deterministic tests, privacy and security documentation, and is released under the MIT License. -
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mcalc is a javascript based microstrip analysis/synthesis calculator. The tool is very easy to use and is fairly accurate. Compared to typical online tools, mcalc uses state of the art equations for the analysis which provides the best accuracy availabl
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sCal: a small, scientific, script programmable calculator--for & in JavaScript. sCal2: an expansion giving a function/program catalog system with: hundreds of unit-conversions & material properties, programming examples, nearly limitless user-procedures
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A web-based character calculator for Diablo II, that will be capable of doing calculations with stats and equipment.
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Fully Managed MySQL, PostgreSQL, and SQL ServerCloud SQL handles your database ops end to end, so you can focus on your app.
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QwikTape
Do calculations, annotate it like you would on a paper "qwikly".
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AuCa
Auction Calculator
Auction Calculator -
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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)
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Beschleunigung-berechnen
Various calculations related to acceleration and deceleration
- Diverse Berechnungen im Zusammenhang mit Beschleunigung und Verzögerung. - Various calculations related to acceleration and deceleration Topics: rechner berechnen calculator to calculate beschleunigen beschleunigung webpage webseite -
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BrewScript
Homebrewing recipe/mashing calculator.
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. -
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Calculator Plus
An advanced and open source calculator application for Android.
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ContextCalc is a little lightweight Firefox extension which adds a menu item in your Firefox context menu showing the result of a computation of a user-defined formula computed on the numbers found in the selected text.
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Crypto Arbitrage
A cryptocurrency arbitrage opportunity calculator
A cryptocurrency arbitrage opportunity calculator and trading bot. Over 800 currencies and 50 markets. In short, it collects JSON from multiple different cryptocurrency markets, goes through the results, and finds the highest and lowest price for each coin. The script will find the highest price (chbtc.com), and lowest price (Bittrex), and divide the two: 51.8/38.23 = ~1.35 (~35% profit margin) and then push these results to the browser. It will also find the next highest market pairs, e.g. chbtc / jubi is the second-highest pair and chbtc/Bittrex the third, jubi/Bittrex the fourth and so on until every possible combination has been computed. Currently you will have to add a market object with the correct settings in the array markets, situated in the settings.js file. I am updating the project every day and this will change soon. You can temporarily stop loading a market from the frontend, or remove the market by deleting the object in settings.js. -
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This is an on-focus drop-down javascript calculator built using the object oriented javascript, which can be attached to any input fields on your webpages. Any number of instances can be used on a single web page.
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Food Storage Calculator
Java 7 based food needs calculator using Google Web Toolkit and HTML5
This web app uses the Google Web Toolkit, (currently version 2.6.1). No hooks to the Google App Engine are required, so the entire application can be contained on an HTML5 web page. The application is technically written in a restricted APIs version of Java 7, then compiled down to JavaScript. Any data storage needs use HTML5's data persisting capabilities Use this food storage calculator to help plan food storage preparedness. This calculator uses the three tier approach to food storage. The three tiers are: 1. Normal perishable food purchases like milk, bread, and ice cream. 2. Multi-month or multi-year perishable items such as canned goods, pastas and cooking oils. 3. Multi-decade non-perishable items such as hard wheat, sugar, and water. -
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Global Calculator
A global calculator with multi language support
GlobalCalc is a cross-platform calculator app with built-in support for multiple languages, including English and Hindi, with plans to expand to more languages. Its intuitive design allows users to switch between languages easily, and even displays numbers in the corresponding numeral system (e.g., Devanagari for Hindi). With features such as basic arithmetic operations, scientific calculations, theme switching, and error-handling, GlobalCalc caters to both casual users and those with advanced calculation needs. -
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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
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JS-BSC is a JavaScript Bowling Score Calculator that also shows max possible score for the game, as well as an interactive per-frame pin knockdown diagram. Tracks 1 game for 3 players, or a 3-game series for one player (easily modified).
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JoseWebApps
Some humble web applications
Here I publish some humble web applications that I have developped.
