You can check your heart rate in under a minute using nothing but two fingers and a clock. Place the tips of your index and middle fingers on the inside of your wrist, just below the base of your thumb, and count the beats you feel. A normal resting heart rate for adults falls between 60 and 100 beats per minute, though athletes often sit in the 40s or 50s.
Finding Your Pulse by Hand
The two easiest places to feel your pulse are your wrist (the radial pulse) and your neck (the carotid pulse). Both give you the same information, so use whichever is more comfortable.
At the wrist: Turn one hand palm-up. Find the spot between the bone on the thumb side of your wrist and the tendon that runs alongside it. Press the tips of your index and middle fingers into that groove. Use light pressure. Pushing too hard can actually flatten the artery and make the pulse harder to feel.
At the neck: Place two fingertips in the soft groove next to your windpipe, on one side only. Never press on both sides of your neck at the same time, because this can restrict blood flow to the brain and make you lightheaded. Again, press gently.
Avoid using your thumb to check your pulse. Your thumb has its own pulse, which can mix with the signal you’re trying to count.
Counting the Beats
Once you feel a steady rhythm, watch a clock or timer and count beats for 15 seconds. Multiply that number by 4 to get your beats per minute. If you want a faster estimate, count for 6 seconds and multiply by 10.
These shortcuts work well when your heart beats regularly. If the rhythm feels uneven, with beats that seem to skip or come at irregular intervals, count for a full 60 seconds instead. Short counting windows amplify errors when the spacing between beats varies, so the full minute gives you a more reliable number.
Getting an Accurate Resting Reading
Your resting heart rate is the baseline number that matters most for tracking fitness and health over time. To measure it accurately, check first thing in the morning before you get out of bed, or after sitting quietly for at least five minutes. Standing up, eating, drinking coffee, or feeling stressed can all push the number higher than your true resting rate.
Caffeine, alcohol, decongestants, and many common prescriptions (blood pressure medications, antidepressants, asthma inhalers, and others) can shift your heart rate up or down. If you’re tracking trends, try to measure under the same conditions each time: same time of day, same position, same amount of rest beforehand. One reading in isolation tells you less than a pattern over days or weeks.
How Wearables and Phone Apps Compare
Smartwatches and fitness trackers use small LED lights pressed against your skin to detect changes in blood volume with each heartbeat. Phone apps work the same way, using your phone’s camera and flash while you hold a fingertip over the lens. This technology is called photoplethysmography, and it’s reasonably good under calm conditions.
The accuracy drops during exercise and drops further if your heart rhythm is irregular. A 2024 study published in the Journal of the American College of Cardiology tested six popular wearables against medical-grade ECGs. In people with normal heart rhythms, devices underestimated heart rate by about 7 beats per minute on average. In people with atrial fibrillation, that gap widened to 17 beats per minute across rest and exercise combined, and reached nearly 29 beats per minute at peak exertion. Devices underestimated the true rate in about 61% of readings.
Phone-based apps show a similar pattern. One large validation study found they underestimated heart rate by about 7 beats per minute in people with irregular rhythms, with errors climbing at higher heart rates. The reason is physical: when beats come very close together, the heart doesn’t fill completely, producing a weaker pulse that the sensor misses.
For day-to-day resting heart rate tracking, wearables are practical and reasonably reliable. For precise readings during intense exercise or if you have a known irregular rhythm, a manual check or a chest strap monitor will be more accurate.
What Your Resting Heart Rate Tells You
The standard normal range for adults is 60 to 100 beats per minute. Within that window, lower generally reflects better cardiovascular fitness. Endurance athletes commonly have resting rates in the 40s because their hearts pump more blood per beat, so fewer beats are needed.
A resting rate consistently above 100 (called tachycardia) can signal dehydration, anxiety, anemia, thyroid problems, infection, or excess caffeine. A resting rate below 60 (called bradycardia) is perfectly normal for fit individuals, but in someone who isn’t particularly active, it can sometimes indicate an issue with the heart’s electrical system. Population studies suggest that rates down to about 50 are common in healthy adults, with the lowest normal values ranging from 40 to 55 depending on age and sex.
Trends matter more than single readings. If your resting heart rate has been steady at 65 for months and suddenly sits at 80 for several days without an obvious explanation, that shift is worth paying attention to.
Target Heart Rate During Exercise
Knowing your maximum heart rate lets you gauge how hard you’re working out. The most commonly cited formula is 220 minus your age, but a more accurate version, developed from a meta-analysis of 351 studies, is 208 minus 0.7 times your age. The older formula tends to underestimate maximum heart rate in people over 40, which can lead to exercise prescriptions that are too easy.
For a 45-year-old, the updated formula gives a max of about 177 beats per minute, compared to 175 from the older formula. The gap widens with age: a 65-year-old gets 163 from the updated equation versus 155 from the old one.
The American Heart Association recommends these target zones based on your estimated maximum:
- Moderate intensity: 50% to 70% of your max. This is a brisk walk or easy bike ride where you can hold a conversation but feel your breathing pick up.
- Vigorous intensity: 70% to 85% of your max. This is running, fast cycling, or interval training where talking becomes difficult.
For that 45-year-old with an estimated max of 177, moderate exercise means keeping the heart rate roughly between 89 and 124, while vigorous exercise falls between 124 and 150. These are estimates. If a workout feels extremely hard but your heart rate looks low, trust your body over the formula.
Irregular Rhythms Worth Noticing
When you check your pulse manually, you’re not just counting speed. You’re also feeling rhythm. A healthy heart has an even, steady beat, like a metronome. Occasional skipped beats are common and usually harmless, especially after caffeine or during stress.
What’s more concerning is a pulse that feels persistently chaotic, with no predictable pattern between beats. This can be a sign of atrial fibrillation, the most common serious heart rhythm disorder. You might also notice a pulse that suddenly jumps to 150 or higher while you’re sitting still, or a resting rate that repeatedly dips below 50 with dizziness, fatigue, or fainting. Any of these patterns, especially if they recur, are worth bringing to a doctor with specific details: what your rate was, what you were doing, and how long it lasted.