To measure your resting heart rate, place two fingertips on the inside of your wrist, count the beats for 30 seconds, and double that number. The result is your beats per minute (bpm). A normal resting heart rate for adults falls between 60 and 100 bpm, but getting an accurate reading depends on when and how you take it.
When to Take the Measurement
Your heart rate follows a natural daily cycle. It slows at night during sleep and rises in the morning as your nervous system ramps up activity. Because of this rhythm, the most consistent time to check your resting heart rate is shortly after waking, before you get out of bed or start your morning routine. If that’s not practical, any calm moment during the day works, as long as you’ve been sitting quietly for at least five minutes beforehand.
A few things can throw off your reading. Wait at least one to two hours after exercise or a stressful event, since your heart rate stays elevated well after the activity ends. Caffeine raises your heart rate too, so wait at least an hour after coffee or tea. Avoid measuring right after you’ve been standing or sitting in one position for a long stretch, which can also shift the number. The goal is to capture your heart at its true baseline, not reacting to anything.
The Manual Pulse Check
The simplest method uses your own fingers. Place the tips of your index and middle fingers (not your thumb, which has its own pulse) on the inside of your opposite wrist, just below the base of your thumb. You’re feeling for the radial artery. Press lightly until you feel a steady throb.
If the rhythm feels regular and strong, count the beats for 30 seconds and multiply by two. So if you count 36 beats in 30 seconds, your resting heart rate is 72 bpm. If you notice the rhythm skipping, pausing, or feeling uneven, count for a full 60 seconds instead. A longer count gives a more accurate result when the beat isn’t perfectly steady.
You can also find your pulse on the side of your neck, just below the jawline. This is the carotid artery, and the pulse is often easier to feel there. Use the same two-finger technique with gentle pressure.
Using a Wearable or Smartwatch
Wrist-based fitness trackers use optical sensors that shine light into your skin and detect blood flow changes. At rest, these devices are reasonably accurate. A validation study comparing wearable sensors against a medical-grade chest strap found average error rates of roughly 2.5% to 5.5% during sedentary activity, depending on the device and the user’s age. For a heart rate of 70 bpm, that translates to being off by about 2 to 4 beats in either direction.
Accuracy drops during exercise, when arm movement and sweat interfere with the sensor. But for a calm, resting measurement, most modern wearables perform well. If your device logs resting heart rate automatically (many do, typically overnight or first thing in the morning), that trend data over weeks and months is more useful than any single reading.
What the Numbers Mean
For adults and adolescents aged 13 and up, the normal resting range is 60 to 100 bpm. Children run higher:
- Newborns (0 to 1 month): 100 to 205 bpm
- Infants (1 to 12 months): 100 to 180 bpm
- Toddlers (1 to 3 years): 80 to 140 bpm
- Preschool (3 to 5 years): 80 to 120 bpm
- School age (5 to 12 years): 70 to 118 bpm
Within the adult range, lower generally reflects better cardiovascular fitness. A well-trained endurance athlete can have a resting heart rate in the 40s or even 30s. A study of 465 endurance athletes published in Circulation found that 38% had minimum heart rates at or below 40 bpm on 24-hour monitoring, and 2% dropped to 30 bpm or below. These extremely low rates were most common in young male cyclists, runners, and rowers. For trained athletes, rates in the 30 to 40 bpm range don’t appear to cause problems.
For everyone else, a resting heart rate consistently above 100 bpm (called tachycardia) or below 60 bpm with symptoms like dizziness, fatigue, or fainting is worth discussing with a doctor. A number in the upper 80s or 90s isn’t dangerous on its own, but if it’s climbing over time without an obvious explanation, it can signal changes in fitness, stress levels, or underlying health.
What Can Shift Your Resting Heart Rate
Your resting heart rate isn’t a fixed number. It fluctuates day to day based on a surprisingly long list of variables. Some you can control: caffeine, alcohol, sleep quality, hydration, stress, and physical fitness all move the needle. Dehydration alone can push your heart rate up by several beats because your blood volume drops and your heart has to pump faster to circulate the same amount of oxygen.
Other factors are outside your control. Age matters: resting heart rate tends to stay relatively stable through adulthood but can shift with aging. Genetics play a role in your baseline. Certain medications, particularly beta-blockers and some blood pressure drugs, lower heart rate, while stimulant medications and decongestants raise it. Hormonal changes, illness, and even altitude can cause temporary shifts. If you’re tracking your resting heart rate to monitor fitness or health, expect some normal variation and focus on the trend over weeks rather than any single reading.
Getting a Reliable Baseline
One reading tells you very little. To establish your true resting heart rate, measure it at the same time of day, under the same conditions, for at least three to five consecutive days and average the results. Morning measurements taken before getting out of bed give the most consistent numbers because you’ve eliminated most of the variables: no caffeine, no recent activity, no stress response from your commute.
Once you know your baseline, periodic checks become more meaningful. A resting heart rate that gradually drops over weeks of regular exercise is a reliable sign of improving cardiovascular fitness. A sudden jump of 10 or more bpm above your normal baseline, sustained over several days, can signal overtraining, oncoming illness, or accumulated stress. Many athletes use exactly this kind of tracking to adjust their training load before they feel overtrained.