We all have a few go-to calculations that we find ourselves doing often, like converting ounces to cups or miles to kilometers—that sort of thing. When I need to do a quick conversion, I use Calculator Soup, a simple website offering hundreds of purpose-built calculators for things like inflation, unit conversion, gas mileage, algebra, and so much more.

The site can be overwhelming at first glance, with its old-school aesthetic and list of categories, but it’s full with the kinds of tools you’d otherwise search for and find ad-ridden versions of. For example: if you’re trying to get the best possible car loan there’s a car loan calculator:

You can enter the loan amount, how long it will last, and the interest rate. You’ll immediately see the results along with a break down. There’s even a link you can use to share the calculation.

Another example Lifehacker readers should appreciate is the computer storage units calculator, which can convert bits to bytes and everything else.

Again, the application shows its work, meaning you don’t just get the answer but learn how you could have calculated it yourself.

I could honestly spend all day talking about the various tools here. There’s one that can convert any number with decimals to a fraction. There’s one that can calculate someone’s current age based on the date of birth. And there’s a tool for working out compound interest. And, if you’re a scientist, there are plenty of specific tools for chemistry, physics, and statistics.

It’s honestly hard to think of anything that’s missing, in terms of calculations one might need to do regularly. I’d personally, add a bunch of calculators related to brewing beer, but that’s pretty niche. The overwhelming majority of calculations the average person is likely to do can be found here.

That’s why Calculator Soup is the kind of site everyone should bookmark, or at least keep in mind. Want more calculator coverage? We’ve outlined the best calculator apps and rounded up the hidden features in the Windows calculator app, so check those out.