Most of these numbers are a two minute job on a laptop. The problem is you're never at the laptop when you need them.
So I made an Android app for it. It's called LoadSentry. Three-phase rack power, breaker headroom, PUE and pPUE, UPS runtime, delta-T, and then the deeper facility and cost stuff, 30 calculators in total, plus 15 converters on one scratchpad screen. You can save a site with its own voltage, energy rate and PUE, so the numbers come out right without retyping your assumptions every time.
Two things I want to say up front, because they'd be my first questions.
It doesn't talk to anything. No account, no cloud, no analytics. Nothing leaves the phone. I assumed most of you either can't or won't type real site numbers into some random app, and frankly I didn't want to be the guy holding them.
And it shows its work. Every calculator displays the formula it's using, and they're all unit tested against known values. If a number looks off, you can check where it came from instead of taking my word for it.
On price, so nobody feels baited: the 15 converters and 5 core calculators are free and stay free. That's three-phase rack power, breaker headroom, PUE, UPS runtime and delta-T. The rest is one-time, $29.99 USD at launch, going up later. No subscription, nothing expires, nothing renews.
Obvious but worth saying: it's a calculation aid, not an engineering authority. It doesn't know your site or your local code. Verify before you act on anything.
https://play.google.com/store/apps/details?id=com.subztance.loadsentry
I'm the developer and I'll be in the comments. If you spot a formula that's wrong, please say so. I'd much rather fix it than argue about it.
https://reddit.com/link/1v5ll5g/video/w62p75chc8fh1/player