Browse free open source C# Calculators and projects below. Use the toggles on the left to filter open source C# Calculators by OS, license, language, programming language, and project status.

  • Turn traffic into pipeline and prospects into customers Icon
    Turn traffic into pipeline and prospects into customers

    For account executives and sales engineers looking for a solution to manage their insights and sales data

    Docket is an AI-powered sales enablement platform designed to unify go-to-market (GTM) data through its proprietary Sales Knowledge Lake™ and activate it with intelligent AI agents. The platform helps marketing teams increase pipeline generation by 15% by engaging website visitors in human-like conversations and qualifying leads. For sales teams, Docket improves seller efficiency by 33% by providing instant product knowledge, retrieving collateral, and creating personalized documents. Built for GTM teams, Docket integrates with over 100 tools across the revenue tech stack and offers enterprise-grade security with SOC 2 Type II, GDPR, and ISO 27001 compliance. Customers report improved win rates, shorter sales cycles, and dramatically reduced response times. Docket’s scalable, accurate, and fast AI agents deliver reliable answers with confidence scores, empowering teams to close deals faster.
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  • Iris Powered By Generali - Iris puts your customer in control of their identity. Icon
    Iris Powered By Generali - Iris puts your customer in control of their identity.

    Increase customer and employee retention by offering Onwatch identity protection today.

    Iris Identity Protection API sends identity monitoring and alerts data into your existing digital environment – an ideal solution for businesses that are looking to offer their customers identity protection services without having to build a new product or app from scratch.
    Learn More
  • 1
    Windows Calculator

    Windows Calculator

    A simple yet powerful calculator that ships with Windows

    Calculator is the open source version of the Microsoft Windows Calculator application. It is a modern Windows app written in C++ and C#, offering standard, scientific, and programmer modes, unit/currency conversion, date calculations, and history/memory operations. It ships preinstalled with Windows and is actively developed on GitHub. Standard Calculator functionality, which offers basic operations and evaluates commands immediately as they are entered. Scientific Calculator functionality, which offers expanded operations and evaluates commands using the order of operations. Programmer Calculator functionality, which offers common mathematical operations for developers, including conversion between common bases.
    Downloads: 114 This Week
    Last Update:
    See Project
  • 2
    IP Subnet Calculator
    Administration of large networks could be a very time-consuming work. So this program should represent a comfortable solution for calculating subnets in IPv4-networks. First fo all it is designed for Windows but also executable under Linux/Mono.
    Downloads: 30 This Week
    Last Update:
    See Project
  • 3
    RPNcalculator
    Nice looking calculator using Reverse Polish Notation (RPN) written for Windows. It supports DEC, HEX, BIN, OCT numbers, GRAD, RAD and DEG.
    Leader badge
    Downloads: 11 This Week
    Last Update:
    See Project
  • 4
    A powerfull tool to work with math functions. At this stage of progress it's draw 2D graphs and 3D graphs of any function. Also have very easy to use calculator which can calculate complicate expressions.
    Downloads: 12 This Week
    Last Update:
    See Project
  • Agentic AI SRE built for Engineering and DevOps teams. Icon
    Agentic AI SRE built for Engineering and DevOps teams.

    No More Time Lost to Troubleshooting

    NeuBird AI's agentic AI SRE delivers autonomous incident resolution, helping team cut MTTR up to 90% and reclaim engineering hours lost to troubleshooting.
    Learn More
  • 5

    Ballistic Calculator

    Open Source Ballistic Calculator in C#

    !!! This project is currently CLOSED. There is a new version of API available under LGPL license at https://github.com/gehtsoft-usa/BallisticCalculator1 There is a new version of application in progress (ported to net framework 5.0) https://github.com/nikolaygekht/ballistic.calculator.app Ballisitic Calculator based on JBM's implementation 3-degree of freedom model, ported to C#, improved to support metric system and extended by some math from Litz's "Applied Ballistic" book. Calculator displays ballistic tables, graphs, comparison graph and reticle images. The application is free to use under GNU license
    Downloads: 9 This Week
    Last Update:
    See Project
  • 6
    Hash Calculator

    Hash Calculator

    Simple Hash Calculator

    This program will allow you to manually type, or browse for a file on your system. You will then be able to generate a MD5, SHA256, or SHA512 hash digest of this file. This program requires no installation and is intended to be a simple, lightweight program. This is also my first open source project!
    Downloads: 5 This Week
    Last Update:
    See Project
  • 7

    MC34063 Universal Calculator

    A calculation tool for the MC34063

    If you ever worked with the MC34063 Switching Controller, you know what a pain it is to calculate all the part values. This tool is an universal tool to help you with this process. You can calculate any standard application, such as step-up, step-down, inverting and step-up-down. PS: I would be happy about any (positive xD) reviews as well as any bugreports, comments or feature requests that you might have!
    Downloads: 4 This Week
    Last Update:
    See Project
  • 8
    MTF Calculator calculates the Modulation Transfer Function (MTF) of an edge image stored in DICOM format and allows the contents to be copied to the clipboard or saved to a Comma-Separated Values (CSV) file.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 9
    Helps you to verify the integrity of the files. Hash Calculator for files. Using: CRC32 MD5 RIPEMD-160 SHA-1 SHA-256 SHA-384 SHA-512 Update: Added CRC32 Now supports big files (more then 4Gb) *Requires .NET 4.5
    Downloads: 4 This Week
    Last Update:
    See Project
  • Field Service+ for MS Dynamics 365 & Salesforce Icon
    Field Service+ for MS Dynamics 365 & Salesforce

    Empower your field service with mobility and reliability

    Resco’s mobile solution streamlines your field service operations with offline work, fast data sync, and powerful tools for frontline workers, all natively integrated into Dynamics 365 and Salesforce.
    Learn More
  • 10

    LM555 Timer Calculator

    A Graphical Tool To Calculate Timer Components

    Many of us use LM555 timer chips to generate clocks, tones for model trains, and all sort of other uses. Calculating the values of the resistors and capacitor in the timing chain, along with the duty cycle for astable operation is a bit tedious on a calculator so I built this small forms based tool to make it easier. It even has the graphic of the chip and the pin numbers to make it easy to hook things up.
    Downloads: 6 This Week
    Last Update:
    See Project
  • 11

    Insulin IP Calc

    Insulin infusion protocol calculator

    A simple, point of care, clinic decision support system (CDSS) Android app for Insulin infusion and hyperglycemia management in the ICU. The infusion protocol calculator is based on the updated "Yale Insulin Infusion Protocol" http://bit.ly/1DaVfUd and American Association of Clinical Endocrinologists (AACE) blood sugar targets. http://inpatient.aace.com/ . Source code requires Xamarin Studio & Android SDK to compile.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 12
    Forex Assistant

    Forex Assistant

    Manage accounts, analyze trades, track strategies & stats , News & Cal

    Forex Assistant is a comprehensive Windows desktop application designed to support forex traders in every aspect of their trading journey. From essential trading calculators and market insights to powerful account and trade management, it brings everything you need into one intuitive platform. 🔑 Main Features 🧮 Calculator Tools Profit/Loss Calculator Currency Converter Position Size Calculator Pips Calculator Margin Calculator 🌍 Market Insights Live Market News Economic Calendar 📊 Account Manager Add multiple trading accounts with balance and custom descriptions. Track current balance, profit/loss, and drawdown (daily and total). Add and manage positions manually with full details: entry price, stop loss, take profit, volume, PNL, and notes. Add notes for every trade: describe the strategy used, whether the trade was emotional or technical. Import historical trades directly from MetaTrader HTML reports. 📈 Trade Analysis & Insights
    Downloads: 5 This Week
    Last Update:
    See Project
  • 13
    Subnet Calculator

    Subnet Calculator

    Subnet Calculator

    Very simple subnet calculator written in C#. Designed to be lightweight and portable for quick daily usage. Feel free to contact me at orphamiel@yahoo.com if you wish to contribute.
    Downloads: 5 This Week
    Last Update:
    See Project
  • 14
    IPAbacus is an TCP/IP address calculator. Given an ip address and a subnet mask it will calc all the relevant information.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 15
    Calculator for Hand Held CE devices. Wide range of functionality in a compact framework.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 16
    Tibi's Mathematics Suite

    Tibi's Mathematics Suite

    A suite of useful mathematical applications.

    The Tibi's Mathematics Suite is a package of various mathematical applications. Included in the package are: a scientific calculator, a graphing calculator, a matrix calculator, and a factorizator. Requirements: .NET Framework 4.0
    Downloads: 3 This Week
    Last Update:
    See Project
  • 17
    A look angle calculator program. Includes precise calculations with optional magnetic variation, updatable satellite listings, and geographical data from USGS database. Input by city, zipcode, or coordinates.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 18
    Time Conversion

    Time Conversion

    Small C# program for study purposes

    A simple hours to minutes calculator made in C# with Windows Forms.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 19
    Drilling Calculator, Calculate all your drilling numerical with least effort and most accuracy! (for student purpose only, not professional usage). Application developed on C#. (c) 2011, Chiradeep Gupta; University of Petroleum and Energy Studies.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 20
    Planetary Interaction calculator for Eve Online. Allows to calculate which resources at which planets should be gathered in order to manufacture high level products.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 21
    A calculator written in C#.NET 3.5 that aims to be simple and usable. Future plans include functionality above and beyond that of the standard windows calculator. (Requires the .NET 3.5 framework)
    Downloads: 1 This Week
    Last Update:
    See Project
  • 22
    Virtual Trainer

    Virtual Trainer

    A tool for personal trainers and fitness enthusiasts.

    Currently: *Source code now available in the form of a Visual Studio 2015 project (zipped).* 1) Calculate BMI, daily caloric intake, target heart rate, maximum and training poundage, and ideal proportions based upon joint measurements. 2) Record and recall measurements and progress using the Basic Information tab. 3) Create, Manage, Export, and Import custom foods/exercises lists using the appropriate tabs. 4) Store and recall workout and diet log records by date. Future Improvements (in the works): * Diet and Workout tab improved functionality.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 23
    A scientific graphing calculator written in C#.NET. This is a no longer graded educational project. This project has been abandoned. See the latest news post for details.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24

    Age Calculator

    Calculates your age in days and logs it.

    This program is written in CSharp by B.J.Erasmus. It calculates the days from your birth date to current date. NOTE: Create "Log.txt" in the same directory the Exe is placed.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25
    Aiac - Aiac is a calculator
    Aiac is a free, open-source, light-weight clipboard calculator for Windows. It also supports on-the-fly text box calculations. Copy a mathematical term to your clipboard, use a global hotkey to automatically calculate the term and put the result back into the clipboard. Written in C#. Uses NCalc (https://ncalc.codeplex.com/).
    Downloads: 0 This Week
    Last Update:
    See Project
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