Heart rate and pulse are closely related but not identical. Your heart rate is the number of times your heart contracts per minute, driven by electrical signals. Your pulse is the physical pressure wave you feel in your arteries each time the heart pushes blood forward. In most healthy people, the two numbers match perfectly. But they’re measured differently, they originate from different mechanisms, and in certain conditions they can actually diverge.
How Each One Works
Your heart has its own electrical system. A cluster of cells in the upper right chamber fires an impulse that tells the heart muscle when to squeeze. Each squeeze pushes a volume of blood into the aorta, the body’s largest artery, and that blood surge creates a pressure wave that ripples outward through your arterial network at a speed determined by artery stiffness and blood pressure. That ripple is your pulse.
Think of it this way: heart rate is the event at the source (the squeeze), and pulse is the downstream effect you can feel (the wave arriving at your wrist or neck). To directly measure heart rate, a device needs to detect those electrical impulses, the same signals captured by an ECG in a hospital. When you press two fingers against your wrist, you’re not sensing the electrical signal at all. You’re feeling the mechanical pressure wave that results from it.
When Heart Rate and Pulse Don’t Match
For a healthy person sitting still, heart rate and pulse are virtually the same number. The heart squeezes 72 times per minute, and you feel 72 pulses at the wrist. But there are situations where a heartbeat doesn’t produce a strong enough contraction to generate a detectable pulse wave. This is called a “pulse deficit.”
Certain irregular heart rhythms can cause the heart to fire before the chambers have filled with enough blood. The electrical event registers as a heartbeat, but the resulting squeeze is too weak to push a meaningful wave out to the arteries. In those cases, an ECG might show 90 beats per minute while a pulse check at the wrist picks up only 78. That gap gives clinicians useful information about how effectively the heart is actually pumping.
What a Normal Reading Looks Like
A normal resting heart rate for adults falls between 60 and 100 beats per minute. Well-trained athletes often sit closer to 40. These ranges apply equally to pulse, since in healthy individuals the two numbers are the same. Factors like caffeine, stress, dehydration, fever, and medications can push the number higher or lower throughout the day, so a single reading is just a snapshot.
How to Check Your Pulse Manually
The two easiest spots are your wrist and your neck. At the wrist, turn your palm face-up and place the tips of your index and middle fingers in the groove between the bone and the tendon on the thumb side. At the neck, slide those same two fingertips into the soft groove just beside your windpipe. Use gentle pressure. Pressing too hard on the neck artery can actually slow the pulse, throwing off your count.
Once you feel a steady beat, count the pulses for 30 seconds and multiply by two. If the rhythm feels irregular, count for a full 60 seconds instead, because the multiplication shortcut assumes even spacing between beats.
What Your Pulse Can Tell You Beyond the Number
A pulse check gives you more than just a count. Healthcare providers assess pulse on a four-point scale that grades the strength of each beat:
- 0: No pulse detected
- 1+: Weak and thready, which can indicate poor blood flow from conditions like heart failure or significant blood loss
- 2+: Normal and strong
- 3+: Full and bounding, sometimes seen with high blood pressure, fluid overload, or simply after vigorous exercise
You can get a rough sense of this yourself. A pulse that feels faint and hard to find is worth noting, as is one that slams against your fingertips when you’re sitting still. Rhythm matters too. A pulse that skips, pauses, or feels chaotic could point to an arrhythmia, even if the overall rate falls within the normal range.
How Wearable Devices Measure Each One
Most smartwatches and fitness trackers use a green LED light that shines into the skin and detects tiny changes in blood volume as the pulse wave passes through. This technology, called photoplethysmography, is reading your pulse, not your heart rate. It tracks the arterial pressure wave, not the electrical impulse.
A study of 180 cardiology patients found that these optical sensors detected 99% of heartbeats and correlated extremely well with a simultaneous ECG, with readings falling within about 4 beats per minute of the ECG value in either direction. For everyday fitness tracking, that’s more than accurate enough. But because the sensor is chasing the pressure wave rather than the electrical signal, it can struggle with very irregular rhythms, heavy motion, poor skin contact, or tattoos that interfere with the light.
Some newer wearables include actual ECG capability, letting you place a finger on the watch crown to complete an electrical circuit. That gives you a true heart rate measurement derived from the same electrical signals a hospital monitor would detect. If you have a known arrhythmia or want to track rhythm irregularities, this distinction matters.
Pulse Pressure Is Something Different Entirely
If you’ve come across the term “pulse pressure,” don’t confuse it with your pulse rate. Pulse pressure is the difference between the top and bottom numbers of a blood pressure reading. If your blood pressure is 120/80, your pulse pressure is 40 mmHg. It reflects how much force each heartbeat exerts on your artery walls. A pulse pressure consistently above 60 can signal stiffening arteries, while a very narrow pulse pressure may suggest the heart isn’t pumping forcefully enough. It’s a separate measurement with its own clinical significance, unrelated to counting beats per minute.