We were just reminded that Facebook (you'll always be The Facebook to us) is officially turning 10 years old next week. In the tech world, that's like making it to the ripe old age of 113. Looking back on all that time, we can't help but ask: Where did all the time go?

Actually, we really didn't want to know the answer to that question.

But now we do, thanks to TIME's handy tool that calculates just how much of our lives have been wasted (uh, invested) on the social network. (Hey, before Buzzfeed, it was all we had to keep us occupied at work.)

Try It

How much time have you wasted? Tell us in the comments section! Especially if you can top our social media manager, Brooke, who has officially spent more than a year of her life browsing Facebook.