The muscle that never takes a day off
Your heart started beating about five or six weeks into pregnancy and has not stopped since. At a resting rate of around 70 beats a minute it beats more than 100,000 times a day and close to 37 million times a year. Over a lifetime that adds up to billions of beats, every one of them pushing blood round a network of vessels long enough to circle the Earth more than twice. The heart above beats at whatever rate you set, so you can see what your own resting pulse looks like.
The bars underneath compare a human lifetime with some other animals. A mouse’s heart races at hundreds of beats a minute but it lives only a couple of years; an elephant’s heart is slow but keeps going for decades. Many mammals end up near a billion beats, which makes the human total, closer to three billion, stand out.
How we calculate it
We split your life into stages and use a typical resting rate for each one, because a baby’s heart beats much faster than an adult’s. For the first year we use 120 beats a minute, from one to five years 100, from six to twelve 85, and from thirteen onward the resting rate you choose with the slider. We multiply each rate by the minutes you spent in that stage. Real life adds faster beats during exercise and slower beats during sleep, which roughly balance out over a day, so a resting figure gives a sensible middle estimate.
| Stage | Typical resting rate we use | Beats per day |
|---|---|---|
| First year | 120 bpm | 172,800 |
| Ages 1 to 5 | 100 bpm | 144,000 |
| Ages 6 to 12 | 85 bpm | 122,400 |
| Teen and adult | your choice (60 to 100 is normal) | 100,800 at 70 bpm |
Worked example. A 36-year-old with a resting rate of 70 bpm: the first year adds about 63 million beats, ages one to five about 263 million, six to twelve about 313 million, and the 23.5 adult years at 70 bpm about 866 million. The total comes to roughly 1.5 billion beats.
A number to look after
A lower resting heart rate generally reflects a heart that does the same job with fewer, stronger beats, which is one reason regular exercise tends to bring it down. This page is for curiosity, not diagnosis: if your resting rate is regularly above 100 or below 60 and you are not an athlete, it is worth mentioning to a doctor.
Questions people ask
What is a normal resting heart rate?
For adults, health organisations such as the American Heart Association give 60 to 100 beats per minute as the normal resting range. Fit people and athletes are often lower. Children’s rates are higher, and newborns can be well over 100.
How do I measure my resting heart rate?
Sit quietly for a few minutes, find your pulse on the inside of your wrist or the side of your neck, and count the beats for 30 seconds, then double it. First thing in the morning gives the most consistent reading.
Is the total exact?
No. Your heart speeds up when you move, slows when you sleep, and was much faster when you were a baby. We use your chosen resting rate for adult years and higher typical rates for childhood, so the result is a reasonable estimate rather than a count.
Do all animals get about a billion heartbeats?
Many mammals land somewhere near a billion beats in a lifetime, because small animals have fast hearts and short lives while large ones have slow hearts and long lives. Humans are an exception and get closer to three billion.
Sources. American Heart Association (adult resting range 60–100 bpm); typical paediatric heart rates from the American Academy of Pediatrics; animal heart rates are commonly cited averages. Calculations run in your browser; nothing you enter is sent anywhere.