Most Fitbit devices do not measure blood pressure
The vast majority of Fitbit trackers and smartwatches cannot measure your blood pressure at all. Fitbit makes dozens of models—from basic step counters to full smartwatches—and only one line has this feature built in: the Fitbit Sense and Fitbit Sense 2. If you own any other Fitbit model, the device straightforward does not have the hardware needed to take a reading.
Blood pressure measurement requires a sensor that can detect changes in your artery walls as your heart pumps. Fitbit's Sense models use what the company calls an EDA (electrodermal activity) sensor combined with a specialized algorithm, but this is not the same as a traditional blood pressure cuff. The reading it produces is an estimate, not a clinical measurement.
If you need to track blood pressure regularly—especially if you have high blood pressure or take medication for it—you should use a dedicated blood pressure monitor alongside your Fitbit, not instead of it. A manual or automatic cuff that wraps around your arm remains the standard that doctors trust.
Key Takeaways
- Only the Fitbit Sense and Fitbit Sense 2 have a blood pressure feature; all other Fitbit models cannot measure it.
- The Sense models estimate blood pressure using an EDA sensor, not a traditional cuff, so readings are less precise than a dedicated monitor.
- Fitbit's blood pressure feature requires you to hold still for 30 seconds and works best when your arm is at heart level.
- You should not rely on Fitbit blood pressure readings alone if you have been diagnosed with high blood pressure or take medication for it.
How the Fitbit Sense blood pressure feature works
The Fitbit Sense and Sense 2 measure blood pressure through your wrist using electrical sensors. When you open the blood pressure app on the watch, you hold your arm still at heart level—roughly at the same height as your chest—for about 30 seconds. The device sends a small electrical current through your skin and measures how your blood vessels respond as your heart beats.
This method is called pulse transit time. It estimates how fast blood travels through your arteries and uses that to calculate a systolic and diastolic reading (the two numbers in a blood pressure measurement). The watch then stores the reading in the Fitbit app on your phone, where you can see a history of your measurements over time.
The feature works best when your arm is relaxed and at the correct height. If you are tense, moving, or holding your arm too high or too low, the reading may be inaccurate. Fitbit recommends taking readings at the same time each day for consistency—usually in the morning before you eat or exercise.
Why Fitbit blood pressure readings are estimates, not clinical measurements
Fitbit's wrist-based method is fundamentally different from the blood pressure cuffs your doctor uses. A traditional cuff measures the actual pressure your blood exerts on your artery walls by inflating around your arm. Fitbit's sensor measures how fast blood moves through your wrist arteries and then calculates pressure from that speed—it is an indirect estimate.
Because of this difference, Fitbit blood pressure readings can be off by several points compared to a cuff reading taken at the same moment. The FDA has not cleared Fitbit's blood pressure feature as a medical device, which means it is not intended to diagnose or treat any condition. Fitbit itself states that the readings are "not intended to replace professional medical information or diagnosis."
If you have been told you have high blood pressure or are taking medication to manage it, you need a traditional cuff monitor to track your actual readings. You can use your Fitbit Sense as a convenience tool to spot trends, but your doctor will want to see cuff readings, not wrist readings, when making decisions about your treatment.
Which Fitbit models have blood pressure tracking
Only two Fitbit models include blood pressure measurement: the Fitbit Sense (released in 2021) and the Fitbit Sense 2 (released in 2022). Both are full smartwatches with large screens, GPS, and other advanced health sensors. If you own a Fitbit Charge, Fitbit Inspire, Fitbit Ace, Fitbit Versa, or any older Fitbit model, blood pressure tracking is not available on your device.
Fitbit has not added this feature to any of its lower-cost or fitness-focused models. The Sense line remains the only option within the Fitbit product range if wrist-based blood pressure measurement is important to you. Other smartwatch brands like Apple Watch and Samsung Galaxy Watch also offer similar wrist-based blood pressure features, but they have the same limitations as Fitbit's version.
How to use blood pressure tracking on your Fitbit Sense
To take a blood pressure reading on a Fitbit Sense or Sense 2, open the blood pressure app on your watch. You will see a screen that prompts you to hold still. Sit down, relax your arm so it is at heart level (about the height of your chest), and keep the watch snug against your skin. Do not talk or move for the 30 seconds it takes to record the reading.
Once the reading is complete, the watch displays your systolic and diastolic numbers on the screen. The reading is automatically saved to your Fitbit app on your phone, where you can view it alongside your other health data. You can take readings as often as you want, but Fitbit recommends taking them at the same time each day for the most consistent results.
If a reading fails or seems unusually high or low, you can retake it when ready. However, wait at least one minute between attempts. If you consistently get readings that seem wrong—much higher or lower than readings from a cuff monitor—the watch may not be positioned correctly on your wrist, or the fit may be too loose.
Common reasons blood pressure readings fail or seem inaccurate
The most common reason a Fitbit blood pressure reading fails is movement. If you move your arm, talk, or shift your position during the 30-second measurement, the watch will not be able to complete the reading and will ask you to try again. Even small movements can disrupt the sensor's ability to detect your pulse.
Incorrect arm position is another frequent cause of inaccuracy. Your arm must be at heart level—not held up high or resting on your lap. If the watch is too loose on your wrist, the sensor cannot make good contact with your skin, and readings will be unreliable. Fitbit recommends wearing the watch snugly but not so tight that it cuts off circulation.
Certain conditions can also affect readings. If you have very cold hands, low blood flow to your wrists, or certain skin conditions, the sensor may struggle to get a clear signal. Caffeine, exercise, and stress can all raise your blood pressure temporarily, so readings taken right after these activities will be higher than your baseline. For the most accurate picture, take readings when you are calm and have been sitting quietly for at least five minutes.
When to use a traditional blood pressure monitor instead
If you have been diagnosed with high blood pressure, take medication to manage it, or have a family history of heart disease, you should use a traditional arm cuff monitor as your primary tracking tool. These devices are clinically validated and give readings that your doctor can trust. You can take cuff readings at home and bring the numbers to your appointments, which helps your doctor decide whether your medication is working.
A Fitbit Sense can be a useful supplement—it lets you check your blood pressure throughout the day without carrying a separate device—but it should not replace your cuff monitor. If you notice a big difference between your Fitbit readings and your cuff readings, trust the cuff. Bring both sets of numbers to your doctor if the gap is large or consistent.
You should also use a cuff monitor if you are starting a new blood pressure medication or if your doctor has asked you to monitor your readings closely. The precision and clinical validation of a traditional cuff make it the right choice when medical decisions depend on the numbers.
Frequently Asked Questions
Can I use my Fitbit blood pressure reading to diagnose high blood pressure?
No. Fitbit's blood pressure feature is not a medical device and cannot diagnose any condition. Only a doctor can diagnose high blood pressure, usually after taking multiple readings with a validated cuff monitor over time. If you think you may have high blood pressure, see your doctor and use a traditional cuff monitor.
Why is my Fitbit blood pressure reading different from my cuff reading?
Fitbit measures blood pressure indirectly using pulse transit time, while a cuff measures the actual pressure your blood exerts on your artery walls. Differences of 5 to 10 points are normal. If the gap is larger or consistent, check that your Fitbit is positioned correctly and that you are holding your arm at heart level. If the difference persists, trust your cuff reading and mention it to your doctor.
Do I need a Fitbit Sense to track my blood pressure?
No. A dedicated blood pressure monitor—either manual or automatic—is a better choice for regular tracking, especially if you have high blood pressure or take medication. A Fitbit Sense is optional and works best as a convenience tool alongside a traditional cuff, not as a replacement for one.
How often should I take blood pressure readings on my Fitbit?
Fitbit recommends taking readings at the same time each day for consistency. Once daily in the morning is typical. If your doctor has asked you to monitor your blood pressure closely, follow their specific instructions about how often to measure. Do not obsess over taking multiple readings throughout the day—this can increase stress and raise your readings artificially.
Will my Fitbit blood pressure data sync with my doctor?
Your Fitbit app stores your blood pressure readings, but they do not automatically send to your doctor's office. You can screenshot or print your readings and bring them to your appointments, or your doctor may have a patient portal where you can upload health data. Ask your doctor how they prefer to receive your blood pressure information.