Work · alternatives · 2026
24 alternatives to MechitCalc
A webapp for Piping calculations with pdf reports
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
- 1
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 →
- 2IM
Hello HN! I'm happy to release this project today. It's a bidirectional calculator (hence the name bidicalc). I've been obsessed with the idea of making a spreadsheet where you can update both inputs and outputs, instead of regular spreadsheets where you can only update inputs. Please let me know what you think! Especially if you find bugs or good example use cases.
Dec 2025 · victorpoughon.github.io · its alternatives →
- 3
- 4AD
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 →
- 5FP
Hello HN users, This is a CAD by code project I have been working on on my free time for more than year now. I built it with 3 goals in mind: - It should be familiar to CAD designers who have used other programs. Same workflow, same terminology. - Reduce the mental effort required to create models as much as possible. This is achieved by: - Provide live rendering and visual guidance as you type. - Allow the user to reference existing edges/faces on the scene instead of having to calculate everything. - Provide interactive mouse helpers for features that are hard to write by code: Only 3…
Apr 2026 · fluidcad.io · its alternatives →
- 6
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 →
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- 10
When searching on the internet for these type of apps, I didn't find many that were open-source AND easy to use. A lot of them had complicated interfaces, although they had loads of features as well. So what I had in mind when making Stack Solver was an app with a modern interface that has the most essential features. It is also well integrated with Microsoft Excel and renders a 3D customizable drawing. Stack Solver is programmed in C# using the WPF framework to ensure it is fast and light. The interface is built using WPF UI, a library that allows it to keep up with modern trends…
2024 · github.com · its alternatives →
- 11
Today I'm open sourcing "Grid studio", a web-based spreadsheet application with full integration of the Python programming language.
2019 · hackernoon.com · its alternatives →
- 12
- 13
I’m a math grad student. I wanted to create ephemeral calculator documents and spreadsheets that I can quickly use along with AI and embed in blog posts. I ended up making a bunch of collaborative calculators that support embedding, shareable live links, and an MCP interface.
Feb 2026 · mcpcalc.com · its alternatives →
- 14
Hi everyone started this project a year ago to generate the CAD for a Jet Engine Axial Compressor. I am now open sourcing this tool that can take in a JSON file with specs and generate the CAD assembly. Still has a lot of work to improve designs but there isn't anything the Open Source community can't accomplish!
2023 · github.com · its alternatives →
- 15AI
(space = reset) Fluid mechanics is an extremely interesting topic and I have been creative coding for a couple of months now. Therefore I started working on flow fields in processing. It had so much fun playing around with the different parameters in this project, I decided to rewrite in p5.js an added a control panel. You can change most of the parameters (within some constraints I thought to be reasonable), randomize the values and export and import settings. Hopefully some coders here get inspired and also join the great creative coding community.
2024 · synapse.nugatio.com · its alternatives →
- 16
Instant engineering and structural reach calculations.
Jul 2026 · slabreachcalculator.site · its alternatives →
- 17
Project-Centric Engineering: Calculate, Manage, & Report.
Jan 2026 · induscalc.com · its alternatives →
- 18
The simplest way to build and share computational tools on the web. Create and share your Python web apps in minutes for free.
2023 · mecsimcalc.com · its alternatives →
- 19
Hi HN, I built CD Calculator – https://cd-calculator.net – a simple tool that helps people calculate interest returns on bank CDs (Certificates of Deposit). Most CD calculators online are either too basic, too outdated, or full of ads. I wanted to make something that's: - Clean and fast - Easy to use - Focused on accuracy With this tool, users can: - Enter principal, rate, and term to get instant results - Simulate compound interest monthly or annually - Copy results with one click Advanced features are coming soon, including: - Recurring deposits - Early withdrawal penalty…
2024 · cd-calculator.net · its alternatives →
- 20
- 21SU
Hey HN! Vinesh, Ian, and Kunal here. We’re building Bracket (YC W22), a bidirectional ETL platform — software that syncs data two ways between your data stack and the spreadsheet tools that your business teams rely on (e.g. Google Sheets, Airtable, and Notion databases), with the ability to add transformation logic (like SQL statements or MongoDB aggregation statements) in between. (https://www.usebracket.com/) In other words, if you want to join columns from two Postgres tables, sync the result to an Airtable table, and allow your Airtable users to edit certain fields from…
2022 · usebracket.com · its alternatives →
- 22
Building calculations made easy for tradespeople
Aug 2026 · apps.apple.com · its alternatives →
- 23
Engineering Workspace for Mechanical Engineers
Jul 2026 · mechtoolshub.com · its alternatives →
- 24
Also compare
- I made a web-based notepad with a built in unit calculator alternatives
- I made a spreadsheet where formulas also update backwards alternatives
- Clay alternatives
- All desktop software calculators are wrong, so I had to build my own alternatives
- FluidCAD – Parametric CAD with JavaScript alternatives
- Figr.app – a multi-user, notepad style calculator (desktop app) 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 →