Shout out to https://instacalc.com/ . It's like a simple spreadsheet or calculator but with awesome support for dimensional analysis -- you can attach any units you want to a quantity and it will track it throughout the calculations. For example, here's a quick scratchpatch I used for calculating memory bandwidth / CPU transfer rates: https://instacalc.com/56842. - Source: Hacker News / 9 months ago

Neat! I used to use https://instacalc.com/ for simple calculations, you can share your calculations, but it doesn't have the notepad feature like this one. - Source: Hacker News / over 1 year ago

In the wide niche on the complexity scale between your basic Windows* calculator and MATLAB sits instacalc.com. Source: over 2 years ago

For quick ad-hoc calculations I like https://instacalc.com/ because:. Source: almost 3 years ago

Surprised no one has mentioned https://instacalc.com yet. Not a native Mac app but genius. - Source: Hacker News / about 3 years ago

For what it's worth I did find an online structural analysis tool that seems simple enough to use and affordable called SkyCiv that I might try, but from your suggestions and the small amount of research I did since, I think I might feel more comfortable doing the calculations by hand and maybe compare my results to the software simulation as confirmation. Source: about 2 years ago

Https://skyciv.com Skyciv is a beautiful tool really worth it for students and I believe it is reasonably within your budget. Source: about 2 years ago

I've found SkyCiv which looks like it has the right level of functionality. However it's all online and if the company ever went under we'd lose the ability to access and run the models. Source: over 2 years ago

You should checkout skyciv its 14$ a month no contract for students I checked it out for a month and it was pretty cool has alot of the stuff you mentioned too. Source: almost 3 years ago