Calcumber is powerful, user-friendly, and unit-aware calculator for school, engineering, and everyday life with some features you rarely find in other calculators:
📏 Real world units ➔ Weight of a letter page: m_page = 8 in * 12 in * 80 g/m^2
🌿Natural comments ➔ Diameter of a tree: d = 70 cm
🔗 Shareing ➔ The share link opens in the WebApp, no installation needed
📱Multi-platform ➔ Windows, WebApp, more to come
This makes Calcumber the ideal friend for exploring math, physics and engineering in real life. Once you combined a great story with a soffisticated calculation, share it with your friends!
Install and Run
Web App
You can run Calcumber without installation
directly on the web!

Windows
Install Calcumber on your Windows computer
directly from the Microsoft Store.
Follow Calcumber
Get Examples and discuss about Calcumber:
Stay informed on new examples and releases:
Follow the Author on LinkedIn:
Contact
For questions and feedback you may directly contact the author:
📧 E-Mail: samuel.hartmann@mfis.ch
Credits
🙏 Thanks the following projects to make Calcumber possible:
Uno Platform
C# and .NET
Visual Studio
ChatGPT
Markdown & Typora
WordPress, Astra Theme, Blocks CSS
License
Licensor grants the User a non-exclusive, non-transferable, and revocable license to use the Calcumber Web App free of charge for personal, educational, non-commercial, or light commercial purposes.
“Light commercial use” includes internal use within a company, or use by professionals for their own calculations. It does not include redistribution, resale, embedding in other software, or offering Calcumber as a paid service.
By accessing or using the Calcumber Web App, the User agrees to the following terms:
1. Grant of License
Licensor grants the User a non-exclusive, non-transferable, and revocable license to use the Calcumber Web App free of charge for personal, educational, non-commercial or commercial purposes.
2. Restrictions
The Software may not be redistributed, embedded in other websites, or offered as part of another service without prior written permission from the Licensor.
Users may not modify, reverse-engineer, or create derivative works based on the Software.
Commercial use beyond casual internal use (e.g., integrating into tools or services) requires separate licensing.
3. Ownership
The Software is the intellectual property of MFis GmbH. All rights not explicitly granted are reserved.
4. Limitation of Liability
The Software is provided “as is”, with no warranties of any kind, express or implied.
In no event shall MFis GmbH be liable for any damages arising out of the use or inability to use the Software — including, but not limited to, loss of data, loss of business, or loss of profit — even if advised of the possibility of such damages.
5. Termination
This license is automatically terminated if any part of this Agreement is violated.
Upon termination, the User must immediately stop using the Software and delete any saved data or derivative works related to it.
6. Future Monetization
Calcumber is intended to remain freely accessible, supported by moderate, non-intrusive advertisements.
The Software may integrate with third-party ad networks such as Google AdSense. These providers may use cookies or similar technologies to collect and process personal data for the purpose of delivering personalized ads, in compliance with applicable laws.
Users will be informed and given a choice through a consent dialog before any such data collection occurs.
MFis GmbH does not collect or store personally identifiable data unless explicitly authorized by the user.
Ads will be selected to remain relevant and non-disruptive. MFis GmbH reserves the right to offer optional premium features or an ad-free experience in the future.
7. Governing Law
This Agreement is governed by the laws of Switzerland. Any legal disputes shall be subject to the exclusive jurisdiction of Swiss courts.