19 signs you're a functioning adult - even if it doesn't feel like it

If you're waiting for a certificate from the government that says, "Congratulations: You are officially an adult," we are sorry to tell you that you will be waiting forever.

But fear not! There are plenty of ways to know if you're a real, live adult - beyond the fact that you've stopped growing and found a gray hair on your head.

We've rounded up 19 non-obvious signs that you're no longer a kid, based on the Quora thread "What are some of the most useful skills to know?" as well as scientific research and expert opinion.

We can't promise we've outlined every sign that you've made the Great Transition, but if you've mastered most of these skills, you definitely deserve that certificate.