Alternatives

Products that do what Notepad Calculator – create and share back of the envelope calculations does

1. 1IM
   I made a web-based notepad with a built in unit calculator▲488

   Hi HN It also supports percentages, dates and variables. I've been working on this alone for a few years now, so would love to get some feedback.

   2022 · numpad.io

2. 2CA
   CalcuLaTeX, a pretty-printing calculator language▲230

   2021 · mkhan45.github.io

3. 3FA
   Figr.app – a multi-user, notepad style calculator (desktop app)▲275

   Hi all, just posting an update to my previous Show HN, where I announced a side-project I worked on which was a (web version) of a multi-user, notepad style calculator: https://news.ycombinator.com/item?id=31817997 After a couple of user requests (and having a good think about it) I decided to migrate the web UI to create a Mac and Windows desktop app. After using it a little bit, I feel this is a much better experience than the webapp, and reduces a lot of the friction if I wanted to run a few small calculations. You can find the download links below:…

   2022 · figr.app

4. 4NS
   Notepad Style Online Calculator▲6

   2020 · type-calc.herokuapp.com

5. 5OS
   Open source non-linear notepad app▲222

   2018 · getmicropad.com

6. 6
   Calculator Notepad▲75

   A free-form calculator for Chrome

   2022

7. 7NN
   Numbr – notepad plus calculator (Chrome extension)▲8

   2022 · numbr.dev

8. 8ÇO
   Çetele – Open-source notepad calculator▲5

   Aug 2026 · cetele.online

9. 9KA
   KnightOS – An open-source OS for calculators▲180

   2016 · knightos.org

10. 10AM
    A Markdown Notepad App▲57

    2019 · github.com

11. 11CO
    Calc-o-pad, a notepad with calculator (mobile first webapp)▲8

    2022 · calc-o-pad.thejunkland.com

12. 12CA
    Create a powerful calculator form for your website▲17

    2019 · convertcalculator.co

13. 13IM
    I made an interactive hex calculator in ncurses▲113

    2019 · github.com

14. 14RE
    Retool: Excel-like, with higher order primitives▲190

    2017 · retool.in

15. 15IT
    Income Tax Calculator▲64

    2015 · incometaxcalculator.net.in

16. 16
    figr.app▲94

    Realtime, multi-user notepad calculator

    2022

17. 17
    Convertible Notes Calculator▲120

    Tool to calculate how convertible notes will convert

    2016

18. 18CA
    Calc – A fast and intuitive command-line calculator written in Go▲94

    2015 · github.com

19. 19AS
    A simple lazy Python calculation engine, with spreadsheet demo▲123

    2021 · github.com

20. 20NA
    Notably – a simple tool for sharing markdown notes▲74

    2019 · notably.cc

21. 21KC
    Kalu – Calculator concept for long and inter-linked calculations▲17

    2015 · kushagragour.in

22. 22ON
    Open Notebook – Software for creating digital math worksheets▲50

    2016 · jaltekruse.github.io

23. 23NM
    Note, my simple command-line note taking app▲81

    2021 · github.com

24. 24NC
    Notes.cx – A simple, anonymous online notepad \w Markdown support▲80

    2021 · notes.cx

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