Versa 3 is not tracking my calories accurately

[Heartmama2]

Just bought a Fitbit versa 3 and it’s not accurate with my activity compared to heart rate.  I have been running on the arc at PF for 30 minutes and I have only burned 120 calories. Fitbit charge 2 was excellent at tracking. Was losing weight using that one because I could track calories in/out pretty close. Anyone else having this issue?

Moderator Edit: Clarified subject

[JohnnyRow]

Your post tile mentions heart rate, but then the post gives it no mention.  Did you check what the heart rate said?

[MarreFitbit]

Hi there, @Heartmama2. Welcome to the Community Forums. Thanks for the details provided in your post about the issue with your Versa 3. I understand where your concern is coming from. 

I was wondering the same as @JohnnyRow. However, please note that you might notice slight variations between your heart-rate reading on your new Fitbit devices compared with your old ones due to improvements in the heart rate sensor and algorithm.

Differences between heart-rate readings on your device and on exercise equipment are likely due to wrist or hand position. Make sure the back of your device is in contact with your wrist and that your band is snug.

Several factors can affect heart rate, including air temperature, stress level, alcohol or caffeine intake, immune response to illness, and medication use (source).

Exercising in cold weather can make it more difficult for your device to track your heart rate, as environmental conditions can affect skin perfusion (the amount of blood that flows through your skin). Spikes in your heart rate during sleep may be caused by sudden movements (for example, waking up and getting out of bed), or a weak signal due to wrist placement. 

As with all heart-rate tracking technology, accuracy is affected by personal physiology, device location on your arm, and type of movement. For a more accurate heart-rate reading:

• Wear your Fitbit device on top of your wrist, and make sure the back of the device is in contact with your skin.
• When you’re not exercising, wear your device a finger’s width above your wrist bone.

• During exercise, wear your device a bit tighter and higher for an improved fit. The band should be snug but not constricting (a tight band restricts blood flow, potentially affecting the heart-rate signal). Many exercises such as bike riding or weight lifting cause you to bend your wrist frequently, which could interfere with the heart-rate signal if the watch is lower on your wrist.

To resolve common issues, see our troubleshooting steps in What factors can affect my heart-rate reading on my Fitbit device?

As for the calories burned in general, did you recently update your weight (or other profile settings such as height, age etc)? If you did, I'd double check your personal information to see if your weight and height were properly set, it may worth the try. To update your profile, see How do I change the units of measurement in my Fitbit account?

Fitbit devices combine your basal metabolic rate (BMR)—the rate at which you burn calories at rest to maintain vital body functions (including breathing, blood circulation, and heartbeat)—and your activity data to estimate your calories burned. 

Your BMR is based on the physical data you entered in to your Fitbit account (height, weight, sex, and age) and accounts for at least half the calories you burn in a day.

In addition, see How do I track my swims with my Fitbit device?

[Heartmama2]

I made sure all information was updated. Lost weight between October and December and have maintained. My calorie count linked to my heart rate went down a lot after getting the Fitbit Versa 3. Example walked almost 40,000 steps one day and my exercise linked to HR showed 0.  I have tightened and adjusted my watch on my wrist hoping it tracks better. Going to compare it with my old Fitbit.