Versa 3 is tracking my calories too low

[Djoakimson]

How do I disable my calorie estimation on Versa 3. A 90 minute Bikram class only shows 170 calories when the apple smartwatch showed 600. I’m doing the same exercise with full time exertion, it should at least show around 300. Why does it measure so low when everyone else in class show so much higher?

Moderator Edit: Clarified subject

[MarreFitbit]

Hi there, @Djoakimson. Thanks for stopping by in the Community Forums and sharing the details about the issue with your Versa 3. I understand where you're concern is coming from. 

By any chance, did you recently update your profile settings such as height, weight, 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.

Hope this helps. 

[Rufous44]

What is the heart rate recorded during the exercise? Apple watch has an excellent heart rate sensor so you might compare the two recording. I feel this is the culprit of law calories burned reporting on Versa 3.