A normal resting heart rate for adults is 60 to 100 beats per minute (bpm). For children, the range is wider and shifts significantly with age, starting as high as 205 bpm in awake newborns and gradually settling into the adult range by around age 10. Below is a detailed breakdown of what’s normal at every stage of life, what pushes your heart rate higher or lower, and how to measure it accurately.
Normal Heart Rate for Infants and Children
Children’s hearts beat considerably faster than adult hearts, especially in the first year of life. A smaller heart pumps less blood per beat, so it needs to beat more often to keep up with the body’s demands. As a child grows and the heart gets bigger and stronger, the rate gradually drops.
Here are the typical awake and sleeping ranges by age:
- Newborn to 3 months: 85 to 205 bpm awake, 80 to 160 bpm asleep
- 3 months to 2 years: 100 to 190 bpm awake, 75 to 160 bpm asleep
- 2 to 10 years: 60 to 140 bpm awake, 60 to 90 bpm asleep
- Over 10 years: 60 to 100 bpm awake, 50 to 90 bpm asleep
These ranges are broad because a child’s heart rate swings with activity, crying, fever, and even excitement. A toddler screaming in a doctor’s office can easily hit the upper end of their range without anything being wrong. What matters more than a single reading is the pattern over time and whether any reading falls consistently outside the expected window.
Normal Heart Rate for Adults
Once you’re past puberty, the standard resting range stays at 60 to 100 bpm for the rest of your life. Unlike children’s ranges, the adult range doesn’t shift meaningfully from decade to decade. A healthy 25-year-old and a healthy 70-year-old share the same normal window.
That said, averages within the range do differ slightly. Women tend to have a slightly faster resting heart rate than men, averaging around 79 bpm compared to about 74 bpm for men. The reason is largely structural: during puberty, male hearts grow about 25% larger than female hearts. A bigger heart pumps more blood per beat, so it doesn’t need to beat as often to deliver the same supply.
Why Athletes Have Lower Heart Rates
If you exercise regularly, your resting heart rate will likely sit at the lower end of the range, or even below it. Highly trained athletes can have resting rates as low as 40 bpm. This isn’t a sign of a problem. Regular aerobic exercise strengthens the heart muscle so it pushes out more blood with each contraction, meaning fewer beats are needed to circulate the same volume.
The more fit you are, the lower your resting rate tends to be, which is why tracking your heart rate over weeks or months can be a useful gauge of improving fitness. A gradual drop in your resting rate usually signals that your cardiovascular system is getting more efficient.
When a Heart Rate Is Too Fast or Too Slow
A resting heart rate below 60 bpm is called bradycardia. Above 100 bpm at rest is called tachycardia. Neither label automatically means something is wrong. Context matters: a resting rate in the 40s or 50s is completely normal for athletes and for people taking certain blood pressure medications that deliberately slow the heart.
The numbers become more meaningful when they come with symptoms. A heart rhythm that’s consistently too fast, too slow, or irregular can cause a fluttering or pounding sensation in the chest, lightheadedness, unusual fatigue, anxiety, or sweating. Chest pain, shortness of breath, or fainting alongside an abnormal rate are signs that need emergency attention.
What Affects Your Resting Heart Rate
Your resting heart rate isn’t a fixed number. It fluctuates throughout the day and across weeks depending on several factors. Stress and anxiety trigger your body’s fight-or-flight response, which speeds up the heart. Hormonal shifts, including those during menstrual cycles, pregnancy, and menopause, can push the rate higher. Caffeine and nicotine are both stimulants that temporarily raise heart rate. Dehydration forces the heart to work harder because there’s less blood volume to circulate. Fever does the same, typically adding about 10 bpm for every degree above normal body temperature.
Medications also play a significant role. Blood pressure drugs like beta-blockers and calcium channel blockers are specifically designed to slow the heart. Decongestants, some asthma medications, and thyroid hormones can speed it up. If your resting rate has changed noticeably after starting a new medication, that shift is often expected rather than alarming.
Maximum Heart Rate by Age
Your maximum heart rate is the fastest your heart can safely beat during intense exercise, and it does decline with age. The most commonly used estimate is simply 220 minus your age, which gives a 30-year-old a predicted max of 190 bpm and a 50-year-old a max of 170 bpm.
A more refined formula, developed by researcher Hirofumi Tanaka through a large-scale analysis, calculates it as 208 minus 0.7 times your age. For a 40-year-old, that works out to 180 bpm instead of the 180 you’d also get from the simpler formula. The two formulas track closely with each other (they correlate at 0.99), but both tend to overestimate your true maximum. The simpler 220-minus-age formula overshoots by an average of about 14 bpm, and the Tanaka formula by about 11 bpm. These formulas are rough guides for setting exercise intensity zones, not precise measurements of your individual ceiling.
If you need your actual maximum heart rate for training purposes, the only reliable way to find it is through a supervised exercise stress test, where you push to peak effort while your heart is being monitored.
How to Measure Your Pulse Accurately
To get a reliable resting heart rate, measure first thing in the morning before you get out of bed, or after sitting quietly for at least five minutes. Place the tips of your index and middle fingers on the inside of your wrist, just below the base of your thumb. Press lightly until you feel a steady pulse. Using a clock or watch with a second hand, count the beats for a full 60 seconds. You can also count for 15 seconds and multiply by four, though a full minute is more accurate, especially if your rhythm is slightly irregular.
Avoid using your thumb to check your pulse, because it has its own detectable pulse that can throw off the count. Wrist-based fitness trackers and smartwatches offer continuous monitoring, but their accuracy varies. They tend to be most reliable at rest and less reliable during vigorous exercise. For a baseline number you can track over time, a manual check remains the simplest and most dependable method.