You can check your heart rate in about 30 seconds using just two fingers pressed against your wrist or neck. A normal resting heart rate for adults falls between 60 and 100 beats per minute, and tracking yours over time gives you a simple window into your cardiovascular fitness.
Finding Your Pulse by Hand
The two easiest spots to feel your pulse are your wrist (radial pulse) and your neck (carotid pulse). For both, use the tips of your index and middle fingers. Don’t use your thumb, which has its own pulse and can throw off your count.
For your wrist, turn one palm face up and place your two fingertips on the thumb side, in the soft groove between the wrist bone and the tendon. You should feel a steady tapping within a few seconds. If you can’t find it, press slightly harder or shift your fingers a fraction of an inch in either direction.
For your neck, place those same two fingertips in the groove just to one side of your windpipe, below the jawline. This pulse is stronger and easier to find, which makes it a good backup if you struggle to locate the wrist pulse. Press gently here, since pushing too hard on the carotid artery can make you feel lightheaded.
Counting and Calculating Your BPM
Once you feel a steady beat, watch a clock or timer and count the number of pulses in 30 seconds, then double that number. That’s your beats per minute (BPM). If you’re short on time, count for 15 seconds and multiply by four, though the shorter the counting window, the more a single missed beat skews your result.
If your pulse feels irregular, meaning beats seem to skip or come at uneven intervals, count for a full 60 seconds to get the most accurate number.
Getting an Accurate Resting Reading
Your resting heart rate is the number that matters most for tracking your baseline health, and a few simple steps keep that measurement reliable. Sit quietly for at least five minutes before checking. Don’t measure within one to two hours after exercise or a stressful event, because your heart rate can stay elevated long after the activity ends. Wait at least an hour after drinking coffee or other caffeinated drinks, which can bump your rate up noticeably. Avoid checking right after you’ve been standing or sitting in one position for a long time, since both can shift your reading.
First thing in the morning, before you get out of bed, tends to produce the most consistent results day to day. If you track it over a few weeks, you’ll start to see your personal baseline emerge.
Normal Resting Heart Rate by Age
The normal range varies significantly with age. Younger hearts beat faster at rest:
- Newborns (birth to 4 weeks): 100 to 205 BPM
- Infants (4 weeks to 1 year): 100 to 180 BPM
- Toddlers (1 to 3 years): 98 to 140 BPM
- Preschool age (3 to 5): 80 to 120 BPM
- School age (5 to 12): 75 to 118 BPM
- Adolescents and adults (13+): 60 to 100 BPM
A resting rate consistently above 100 BPM in an adult is considered tachycardia, or a fast heart rate. On the other end, well-trained endurance athletes often sit well below 60 BPM. A study of 465 endurance athletes found that 38% had resting rates at or below 40 BPM, which would look alarming in a sedentary person but is a normal adaptation to years of aerobic training. Current cardiology guidelines say that in the absence of symptoms like dizziness or fainting, a low resting rate in an athlete is not cause for concern.
Calculating Your Target Heart Rate for Exercise
If you want to use heart rate to guide workout intensity, you first need an estimate of your maximum heart rate. The most common formula is simple: 220 minus your age. So a 40-year-old would have an estimated max of 180 BPM. This formula can be off by 10 to 12 beats in either direction, so treat it as a rough guide rather than a hard ceiling. An alternative calculation that may be slightly more accurate: multiply your age by 0.7, then subtract that from 207. For the same 40-year-old, that gives 179 BPM.
From there, you can figure out training zones. A common moderate-intensity zone is 60% to 80% of your heart rate reserve, which accounts for your resting rate. Here’s how it works:
First, subtract your resting heart rate from your estimated maximum. That gap is your heart rate reserve. Then multiply the reserve by the percentage you want (say, 0.60 for the low end and 0.80 for the high end), and add your resting heart rate back to each number. The result is your target zone in BPM. For example, if your max is 180 and your resting rate is 65, your reserve is 115. Sixty percent of 115 is 69, plus 65 gives you 134 BPM. Eighty percent of 115 is 92, plus 65 gives you 157 BPM. Your moderate-intensity zone would be roughly 134 to 157 BPM.
Using a Smartwatch or Fitness Tracker
Wrist-based wearables use green LED lights that shine through your skin and detect changes in blood flow. This technology, called optical sensing, works well at rest and during steady-state exercise. At rest, the typical error is less than 1 BPM compared to a clinical reading. During steady exercise like jogging at an even pace, accuracy stays close to that mark.
The problem shows up when your heart rate changes quickly. During rapid intensity shifts, like interval training or sprints, one study found the wrist sensor missed the mark by more than 5 BPM in 72% of participants during the first ramp-up phase. The sensor lags behind your actual heart rate because it measures blood volume changes at the wrist, which take a moment to catch up with what the heart is doing. During steady exercise after that ramp-up, accuracy improved dramatically, with only about 3 to 10% of readings exceeding the 5 BPM error threshold.
Skin tone has historically been a concern with optical sensors, but recent research using the Fitzpatrick skin classification scale found no significant overall effect of skin tone on accuracy across rest and exercise phases. There was one narrow exception: during rapid intensity changes, people with darker skin tones showed slightly higher readings from the wrist sensor, though the main source of error was still the pace of intensity change rather than skin tone itself.
The practical takeaway: trust your wearable for resting heart rate and steady cardio. For interval training or activities with lots of stop-and-start effort, a chest strap monitor will give you more reliable real-time numbers. And even a 5 to 10% error matters if you’re making health decisions based on a single reading, so use trends over days and weeks rather than fixating on any one number.
What Your Heart Rate Tells You Over Time
A single heart rate reading is a snapshot. The real value comes from tracking patterns. A resting heart rate that gradually drops over weeks of consistent exercise is a sign your cardiovascular system is getting more efficient. A sudden jump of 5 to 10 BPM above your normal baseline, especially paired with fatigue, can signal that your body is fighting off an illness, that you’re overtrained, or that you’re dehydrated.
If your resting heart rate consistently sits above 100 BPM without an obvious cause like caffeine, stress, or recent activity, or if you notice your pulse feels irregular when you check it manually, those are patterns worth bringing up with a healthcare provider. The manual check is still one of the fastest, cheapest, and most reliable tools you have for keeping tabs on your heart.