How Many Heartbeats Does a Human Get in a Lifetime? The Science of Your Cardiac Budget
Your heart beats about 100,000 times per day. That’s 35 million times a year, and roughly 2.5 billion beats over an average 80-year lifespan. But here’s the surprising part: despite being one of the most reliable metrics in biology, the total number of heartbeats in a lifetime is remarkably consistent across mammals — hovering around …