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NumPad
p/numpadA powerful text editor and calculator for the web
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Tony Onodi

NumPad - A powerful text editor and calculator for the web

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NumPad is a fast, lightweight web app with support for units, dates and more. It lets you keep notes and calculations in one document, gives you answers as you type, and it understands calculations like "£200 + 20%" or "2500kcal / 1 day in watts".

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Tony Onodi
Maker
Hi everyone! I've been (very) intermittently working on NumPad for 3 years now, so I'm very pleased to be launching it today. NumPad is my take on a Soulver-like calculator. It's web based, has support for multi-cursor editing and has great support for calculations that involve physical units, percentages, dates, times and currencies. I've got a long to-do list which includes: * Autocomplete * Support for multiple documents * Vim mode * Support for different bases (e.g. binary, hex etc.) * Time zones * Totals and averages * Dark mode I'll be hanging around on this thread today so let me know if you have any feedback or suggestions.
Andrew
Omg! It's so nice, neat, cute, and simple. I love how it works even without any registrations. I had a similar experience with typefully. Nice job 👏
Tony Onodi
Maker
@degisner Thanks!
Naveed Rehman
I don't know how you did it, but that is something that I have been looking for. Can we also solve equations e.g. 3*x-4=22?
Tony Onodi
Maker
@naveed_rehman Glad you like it! I started going down the rabbit hole of writing an equation solver, but it was just that: a rabbit hole. So I gave up, but it will probably be something I tackle in the future. In the meantime: x = 8.66, recurring of course.
Naveed Rehman
i wrote a php script back in 2013. still available but runs on php 5 only. chk phpEquatins (link at naveedurrehman.com). i used newton raphson method of differentiation. it is used by matlab n EES. thanks for the answer 😊
Uladzimir Yankovich
Great product! Up 🚀 Follow me to find out about my next launch 🤗