You can find 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, between the bone and the tendon on your thumb side, and count the beats for 60 seconds. That number is your heart rate in beats per minute (bpm). For most adults at rest, it falls between 60 and 100 bpm.
The Manual Pulse Check
There are two reliable spots on your body for feeling your pulse. The wrist (radial pulse) is the most common: press gently with your index and middle fingers on the thumb side of your inner wrist until you feel a steady throb. The neck (carotid pulse) works too: place those same two fingertips in the groove just beside your windpipe. Never use your thumb, which has its own pulse and can throw off your count.
Count the beats for a full 60 seconds for the most accurate reading. A shortcut is to count for 15 seconds and multiply by four, though this amplifies any miscount. If you lose track at beat 22 and it should have been 23, you’re off by 4 bpm in your final number.
Getting an Accurate Resting Reading
Your resting heart rate is the baseline number that tells you the most about your cardiovascular fitness, so the conditions matter. Sit quietly for at least five minutes before checking. Avoid measuring within one to two hours after exercise or a stressful event. Wait at least an hour after drinking coffee or other caffeinated drinks, which can temporarily spike your rate. Don’t take a reading after standing or sitting in the same position for a long time, since both can shift your numbers.
First thing in the morning, before getting out of bed, is the most consistent time to check. If you’re tracking your resting heart rate over weeks or months to watch a trend, measuring at the same time each day eliminates most of the noise.
Using a Smartwatch or Fitness Tracker
Wrist-worn devices use small LED lights that shine into your skin and detect blood flow changes with each heartbeat. At rest, they perform reasonably well. A 2024 study published in the Journal of the American College of Cardiology tested several popular brands against a medical-grade ECG and found that resting readings were off by about 5 beats per minute on average in people with a normal heart rhythm.
During exercise, accuracy drops significantly. The same study found readings drifted by roughly 14 bpm at peak effort in people with normal rhythm, and the gap widened to nearly 29 bpm in people with atrial fibrillation (an irregular heartbeat). Across all conditions, the devices tended to underestimate heart rate by about 7 bpm in normal rhythm and 17 bpm in atrial fibrillation. If you rely on your watch to stay within a specific training zone, a chest strap heart rate monitor will give you numbers much closer to what an ECG would show.
Smartphone Camera Apps
Many phone apps ask you to place your fingertip over the rear camera and flash. The light shines through your skin, and the camera picks up tiny color changes with each pulse of blood. In research on healthy adults under controlled conditions, these apps show strong agreement with ECG readings for resting heart rate, with correlation values above 0.98 in several studies.
The catch is that those results come from ideal lab settings. Finger pressure, ambient lighting, hand tremor, and the specific algorithm each app uses all affect reliability. For a casual check of your resting pulse, a well-reviewed app is a reasonable tool. For anything you’d want clinical precision on, the two-finger method or a dedicated heart rate monitor is more dependable.
What Your Numbers Mean
A normal resting heart rate for adults is 60 to 100 bpm. Endurance athletes and very fit individuals often sit in the 40s or 50s, which is normal for them. Children run higher: a newborn’s resting rate can range from 100 to 205 bpm, a toddler’s from 98 to 140, and a school-age child’s from 75 to 118. By adolescence, the range settles into the adult window of 60 to 100.
A resting rate consistently below 60 bpm in a non-athlete is called bradycardia. It doesn’t always cause problems, but if it comes with dizziness, fatigue, or fainting, it signals that the heart isn’t pumping enough blood. A resting rate persistently above 100 bpm is tachycardia, which can result from stress, dehydration, caffeine, fever, or underlying heart conditions. Either extreme is worth bringing up with a doctor, especially if it’s new or paired with symptoms.
Heart Rate During Exercise
Your maximum heart rate gives you a ceiling for calculating training zones. The most widely used formula is simply 220 minus your age. A more refined version, developed by researcher Hirofumi Tanaka, uses 208 minus 0.7 times your age. Both formulas are rough estimates. Research comparing their predictions to actual measured maximums found that neither reliably predicts an individual’s true max, and both tend to overestimate it.
Still, these estimates are useful as starting points. General guidelines break exercise intensity into two zones based on your estimated max:
- Moderate intensity: 50% to 70% of your max heart rate
- Vigorous intensity: 70% to 85% of your max heart rate
For a 40-year-old using the 220-minus-age formula, the estimated max is 180 bpm. Moderate exercise would mean keeping your heart rate between 90 and 126 bpm, and vigorous exercise between 126 and 153 bpm. These zones help you gauge effort when perceived exertion alone isn’t enough to guide your workout. If you can hold a conversation but not sing, you’re typically in the moderate range. If you can only get out a few words before needing a breath, you’re in the vigorous range.
Tracking Changes Over Time
A single heart rate reading is a snapshot. The real value comes from watching trends. A gradually declining resting heart rate over weeks of consistent exercise reflects improving cardiovascular fitness. A sudden jump of 10 or more bpm above your personal baseline, lasting several days, can signal overtraining, illness coming on, dehydration, or increased stress.
Write your numbers down or use an app that logs them automatically. Morning readings taken under the same conditions give you the cleanest data. Over a few weeks, you’ll learn your personal normal, which matters far more than where you fall on a population-wide chart.