Browse 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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  • 1
    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.
    Downloads: 0 This Week
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  • 2
    Food Storage Calculator

    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.
    Downloads: 0 This Week
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  • 3
    Global Calculator

    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.
    Downloads: 0 This Week
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  • 4
    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
    Downloads: 0 This Week
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  • 5
    A free calculator for websites written in javascript.
    Downloads: 0 This Week
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  • 6

    LPMCalc2

    Loan Payment Matrix Calculator 2.0

    This calculates a matrix of monthly loan payments based on the initial principal, seed interest rate, and type of loan. Clicking on a loan amount in the matrix will produce an amortization table with totals. I asked AI to convert my server side perl script into Java script and this is what it produced - with a few extra modifications. Enjoy!
    Downloads: 0 This Week
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  • 7

    MTG Stats Calculator

    Stats Calculator for the card game Magic the gathering

    This is a WebApp project, you can visite the project web site to access to it.
    Downloads: 0 This Week
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  • 8
    Nano ID

    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.
    Downloads: 0 This Week
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  • 9
    Large Integer Calculator. Includes most arithmetic functions plus named memory values.
    Downloads: 0 This Week
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  • 10
    Web-based emergency dosage calculator. Used in a real-world emergency room at a public hospital.
    Downloads: 0 This Week
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  • 11
    This is a standalone HTML/JavaScript application with which a manager can get an estimate of the costs involved with the deploymnent of 1) a conventional network, 2) a network with OSS based servers and 3) a network with OSS based servers and desktops.
    Downloads: 0 This Week
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  • 12
    Quick Calculator

    Quick Calculator

    A Calculator Application

    A calculator application. Requires Windows, and Internet Explorer 9.
    Downloads: 0 This Week
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  • 13
    Quick Calculator 2

    Quick Calculator 2

    A Calculator Application

    Downloads: 0 This Week
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  • 14
    A web browser based calculator written in HTML and JavaScript that will calculate the Variable Length Subnet Masking for your network. Simply enter your CIDR block address/mask and the number of addresses you need in each network, and it does the rest.
    Downloads: 0 This Week
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  • 15
    Simple Loan Calculator

    Simple Loan Calculator

    Simple Loan Calculator Script code.

    This is Simple Loan Calculator Script code. You can calculate the monthly payment, the amount of interest paid, the total cost of credit. It is built with JavaScript. Get more free projects : https://mrbroo.com/
    Downloads: 0 This Week
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  • 16
    Web-based nutrition calculator for adult intensive care patients (for enteral and parenteral nutrition).
    Downloads: 0 This Week
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  • 17
    A Yugioh Trading Card Game Life Point calculator made in JavaScript primarily for mobile phones. It comes as an html page, and you load it with your phone's browser.
    Downloads: 0 This Week
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  • 18
    calculadora-cordova-brython

    calculadora-cordova-brython

    Example of application created with Cordova and Brython

    Example of application created with the Cordova Framework and the Brython Interpreter. Simple calculator that allows basic operations.
    Downloads: 0 This Week
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  • 19
    This is a scientific calculator in javascript, its interface's same to Microsoft Windows's calculator, it can be switched between simple and scientific form, and allows web developpers integrate into theirs apps.
    Downloads: 0 This Week
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  • 20
    pretty-bytes

    pretty-bytes

    Convert bytes to a human readable string: 1337 → 1.34 kB

    pretty-bytes is a JavaScript utility for converting raw byte counts into compact, human-readable size strings. It uses decimal SI units by default, turning values such as 1337 bytes into 1.34 kB. The library can display bits instead of bytes and can switch to binary prefixes such as KiB when appropriate. Signed output is available for showing positive or negative size differences. Formatting can be localized, and developers can control fractional digits, spacing, and non-breaking spaces. Fixed-width output can align values neatly in tables, status displays, and progress interfaces. The function accepts both regular numbers and BigInt values, making it suitable for a wide range of file-size and data-rate displays.
    Downloads: 0 This Week
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  • 21
    pretty-ms

    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.
    Downloads: 0 This Week
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  • 22
    An online running route calculator based on OpenStreetMap data. An example deployment can be found at http://runner.exxeta.com/
    Downloads: 0 This Week
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  • 23
    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
    Downloads: 0 This Week
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