While science has found that coffee may help you live longer, this in no way means you're safe to casually knock back 36 espresso shots.
Yes, there is a lethal limit to coffee. The FDA says that healthy adults can safely consume 400mg of coffee a day, which is roughly equal to 4-5 cups, and shockingly, 10 cans of soda. Yes, you could technically drink 10 Diet Cokes today. But please don't; there's nothing cute about a grown man running around the office like a hyperactive child.
According to a video by ASAPScience, a lethal dose of coffee "is somewhere around 150 milligrams of caffeine per kilogram of your body." So, if you weigh 154 pounds, it would take about 70 cups of coffee for you to overdose. We're not even entirely sure how one would manage to drink 70 cups (like would you just live in the bathroom all day long?), so it's safe to say you don't have a ton to worry about. In fact, "You wouldn't be able to physically fit that much in your stomach," ASAPScience says. "You would also start experiencing mania and hallucinations before getting to this point." Fantastic!