You’ve just stumbled onto what might be the most wonderfully random mix of calculators anywhere online. No matter who you are, there’s something here for you.

Into tech and gadgets? We’ve got tools that help you figure out the right motor for your drone. Love traveling? There’s even a calculator to help you choose the right SPF for that beach trip to Bali. If photography is your thing, we can help you plan the perfect star time-lapse. And if you’re a student trying to get through homework, our education calculators are right there with you.

From an aspect-ratio calculator to a Minecraft circle calculator — if it has a formula behind it, chances are we’ve built a tool for it. And if you don’t see a calculator you think should exist, just let us know. We’re always adding new tools, and we’d be happy to create one for you!