What Fitbit devices measure and what they don't

Most Fitbit devices do not measure blood pressure. Fitbit trackers and smartwatches monitor heart rate, steps, sleep, calories burned, and exercise — but they cannot detect the force of blood pushing against your artery walls, which is what blood pressure measures. The sensors built into standard Fitbits are not designed for this purpose.

Fitbit does make one device that can measure blood pressure: the Fitbit Sense 2 and the original Fitbit Sense. These smartwatches include an EDA sensor (electrodermal activity) and can work with a separate Fitbit blood pressure cuff accessory that you purchase and sync to the watch. The watch itself does not take the reading — the cuff does — but the Fitbit app stores and tracks the results over time.

If you own a different Fitbit model (Charge, Inspire, Versa, or Ace), you cannot measure blood pressure through the device alone, even with an accessory. You would need to use a traditional blood pressure monitor and manually log the readings in the Fitbit app if you want them recorded in one place.

Key Takeaways

  • Standard Fitbit trackers and most smartwatches measure heart rate and activity but not blood pressure.
  • The Fitbit Sense 2 and original Fitbit Sense can sync with a separate Fitbit blood pressure cuff to store readings in the app.
  • If you own a Fitbit Charge, Inspire, Versa, or Ace, you will need a separate blood pressure monitor to track readings outside the Fitbit ecosystem.
  • A Fitbit blood pressure cuff is an optional accessory and costs extra; it is not included with any Fitbit watch.

How the Fitbit blood pressure cuff works with Sense 2

The Fitbit blood pressure cuff is a small, separate device that wraps around your wrist or arm. You inflate it manually or press a button to inflate it, take your reading, and then open the Fitbit app on your phone to sync the result. The cuff itself stores a few readings, but syncing transfers them to your phone and watch so you can see trends over weeks and months.

The cuff connects to the Fitbit Sense 2 via Bluetooth. Once paired, you can view your blood pressure history on the watch face and in the app. The app displays systolic and diastolic readings, the time and date of each measurement, and a graph showing how your readings change over time. You can also add notes to individual readings — for example, "after exercise" or "morning reading" — to help you spot patterns.

The cuff requires a separate purchase and is not bundled with the Fitbit Sense 2. Pricing and availability vary by retailer and region. You will need to check the Fitbit website or authorized sellers for current options and cost.

Why Fitbit devices don't measure blood pressure directly

Blood pressure measurement requires specific sensors that detect the pressure wave traveling through your artery as your heart beats. This is why traditional blood pressure monitors use an inflatable cuff — the cuff tightens around your arm until it stops blood flow, then gradually releases while a sensor listens for the sound or vibration of blood returning. Fitbit's optical heart rate sensors, which use light to detect blood flow under the skin, cannot perform this measurement.

Some smartwatches from other brands claim to estimate blood pressure using heart rate data and machine learning, but these estimates are not as accurate as a cuff-based reading and are not approved by medical regulators for diagnosis or treatment decisions. Fitbit has chosen not to offer this type of estimation on its devices.

If you need to monitor blood pressure for medical reasons, a traditional cuff-based monitor — whether a Fitbit cuff, a pharmacy monitor, or a home monitor prescribed by your doctor — remains the standard. Wearable technology is improving, but it has not yet replaced the cuff for reliable blood pressure tracking.

Other health metrics Fitbit devices do track

Fitbit devices measure heart rate continuously throughout the day and night using an optical sensor on the back of the watch or band. They track sleep by detecting movement and heart rate changes, breaking it down into light, deep, and REM stages on newer models. They also count steps, distance, and calories burned based on movement and your personal data.

Many Fitbit models include an SpO2 sensor that estimates blood oxygen levels, which can be useful for detecting sleep apnea or other breathing issues. Some models also track stress using the EDA sensor (which measures electrical changes in your skin) and offer guided breathing sessions to help you relax. Newer Fitbits include skin temperature tracking, which can help predict illness or track menstrual cycle patterns.

These metrics are logged automatically and displayed in the Fitbit app, where you can review daily, weekly, and monthly trends. None of these measurements replace a visit to your doctor, but they can help you notice patterns in your own health and give you information to discuss with your healthcare provider.

Choosing a Fitbit if blood pressure monitoring matters to you

If blood pressure tracking is important to your health routine, the Fitbit Sense 2 is your only option within the Fitbit line. It is the only model that can sync with the Fitbit blood pressure cuff. If you already own a different Fitbit and want to track blood pressure, you have two choices: purchase a separate blood pressure monitor and log readings manually in the Fitbit app, or upgrade to a Fitbit Sense 2.

Before buying a Fitbit Sense 2 specifically for blood pressure tracking, consider whether you need the cuff accessory as well. The watch and cuff are sold separately, so budget for both if you want the full setup. Also check whether your insurance covers a home blood pressure monitor — many plans do, and a prescribed monitor may be more affordable than purchasing one separately.

If you do not need blood pressure monitoring, other Fitbit models offer excellent heart rate, sleep, and activity tracking at lower price points. The choice depends on what health metrics matter most to you and your budget.

Frequently Asked Questions

Can I use a non-Fitbit blood pressure cuff with my Fitbit watch?

Yes. Any blood pressure monitor will work with any Fitbit device. You take your reading on the separate monitor, then manually enter the systolic and diastolic numbers into the Fitbit app. The app will store and track these readings over time, even though the watch itself did not take the measurement. This approach works with all Fitbit models.

Is the Fitbit blood pressure cuff accurate?

The Fitbit blood pressure cuff uses the same technology as other home blood pressure monitors — an inflatable cuff and an electronic sensor. Accuracy depends on proper fit, correct technique, and regular calibration. For medical decisions, your doctor may want readings from a monitor they have validated. Ask your healthcare provider if the Fitbit cuff meets their standards for your situation.

Does Fitbit Sense 2 measure blood pressure without the cuff?

No. The Fitbit Sense 2 watch itself does not measure blood pressure. It can only display and store readings taken with the separate Fitbit blood pressure cuff accessory. The watch's sensors measure heart rate, stress, and other metrics, but not blood pressure.

Will Fitbit add blood pressure to other watch models?

Fitbit has not announced plans to add blood pressure measurement to other models. The Sense 2 remains the only Fitbit device designed to work with the blood pressure cuff. Product plans can change, so check Fitbit's official website for any updates.