Life & fun · alternatives · 2026
24 alternatives to Kalu – Calculator concept for long and inter-linked calculations
Kalu is a calculator designed to handle long and interconnected calculations. It allows users to work through complex mathematical problems where results from one calculation feed into the next. The tool is intended… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Kalu – Calculator concept for long and inter-linked calculations launched in 2015; newer entries below may have overtaken it.
- 1
Kalker is a calculator that supports user-defined variables, functions, ambiguous syntax, differentiation and integration. It runs on Windows, macOS, Linux, Android, and in web browsers (with WebAssembly).
2021 · kalk.strct.net · its alternatives →
- 2
The Unsure Calculator is an online tool that lets you calculate with numbers you’re not sure about.
2025 · filiph.github.io · its alternatives →
- 3IM
I've been studying interval arithmetic for the past few weeks and it's a really interesting field because while there is a ton of super interesting research published over the past decades, it has never really gotten the recognition that it deserves, IMO. One reason for this is that standard interval arithmetic has really poor handling of division by intervals containing zero. If you compute 1 / [-1, 2] in regular interval arithmetic, you get either [-∞, +∞], or you have to say that the operation is undefined. Both solutions are virtually useless. The real answer of course is [-∞, -1] U…
Apr 2026 · victorpoughon.github.io · its alternatives →
- 4
kalker▲70A calculator that supports math syntax, complex numbers, etc
2021 · kalker.xyz · its alternatives →
- 5
I launched NumPad v1 on here a few years ago, and back then it wasn't much more than a thin CodeMirror wrapper around the calculator engine I'd written. Now I've rewritten it as a PWA that supports multiple documents, persists them to IndexedDB, and has a syncing service for paying customers. Syncing is handled by Automerge[1] under the hood, which should make it relatively easy to get document sharing working too. [1] https://automerge.org/
2022 · numpad.io · its alternatives →
- 6
Evaluator▲107A simple calculator app for macOS and Windows
2019 · evaluator.link · its alternatives →
- 7
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 · its alternatives →
- 8
- 9AD
A new calculator software cannot really bring attention (https://chachatelier.fr/chalk/) However, I wrote a full article explaining why I had to build something "new" that does not behave like usual desktop calculator softwares : TL;DR All "small" calculator softwares I know share the same design flaws. And the GUI is not the only stumbling block in their poor efficiency. Handling correctly numerical approximations - expected or not - is crucial to trust the results. It is usually not done in lightweight tools. It should. So I prove that if I could do it, OS manufacturers…
2022 · its alternatives →
- 10ND
2015 · parnold-x.github.io · its alternatives →
- 11
Caligator▲134An open-source calculator & convertor that thinks like you
2019 · caligator.vercel.app · its alternatives →
- 12
Create powerful, beautiful Calculator forms
2019 · convertcalculator.com · its alternatives →
- 13
- 14
CalculatorNinjas▲117Ultimate online calculator for finance, health, stats & Math
2024 · calculatorninjas.com · its alternatives →
- 15
Hissab▲108Hissab is a strict, unit-aware natural-language calculator for exact units, dates, finance, developer math, and AI-agent workflows. Free, open-source, and installable.
2023 · hissab.io · its alternatives →
- 16
A simple command-line calculator written in Go. Contribute to alfredxing/calc development by creating an account on GitHub.
2015 · github.com · its alternatives →
- 17KL
2021 · katlang.org · its alternatives →
- 18
- 19
Determine what score you need on your final exam 💯
2018 · finalgradecalc.com · its alternatives →
- 20
A free-form calculator for Chrome
2022 · chromewebstore.google.com · its alternatives →
- 21
- 22
Do your daily math, but make it cute
Apr 2026 · mykawaiistationery.com · its alternatives →
- 23
Awesome gesture-based calculator. Beautifully designed.
2014 · rechner-app.com · its alternatives →
- 24
We launched Mathematical Calculator
2025 · mathematicalcalculator.com · its alternatives →
Also compare
- Kalk, A calculator with math syntax, complex numbers alternatives
- Unsure Calculator – back-of-a-napkin probabilistic calculator alternatives
- I made a calculator that works over disjoint sets of intervals alternatives
- kalker alternatives
- I made a web-based notepad with a built in unit calculator alternatives
- Evaluator alternatives
Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →