Questions about accuracy of calories burned

[Bb1gunner]

I’m 6’7’’ 306 pounds. I don’t do a bunch of high intensity cardio but my job requires me to lift heavy furniture and be on my feet most the day. My BMR is somewhere around 3000 calories a day. My fit bit is saying I’m burning between 5000 and 6000 calories on work days and I’m having a hard time believing that it’s anywhere near accurate. Any idea on how accurate it is? I just got the versa 4 and have a had it for about a week and a half 

[FatimaFitbit]

Hi there @Bb1gunner! A warm welcome to the Fitbit Community! 

Thank you for telling us about this situation. It sounds like a really challenging activity lifting heavy weights. 

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. If your device tracks heart rate, your heart-rate data is also included, especially to estimate calories burned during exercise. The number you see on your Fitbit device is your total calories burned for the day.

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. Because your body burns calories even if you’re asleep or not moving, you see calories burned on your device when you wake up and will notice this number increase throughout the day.

There are some calculators online to check which your BMR is.

Additionally, I can suggest you the following tips to make sure your Fitbit daily activity is accurate: 

• Make sure that you wear your device correctly, either on top of your wrist or in the clip.
• Confirm that the personal information you entered when you set up your Fitbit account (height, weight, sex, and age) is correct. For more information, see How do I manage my Fitbit profile?