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How Does Fitbit Calculate Calories Burned

How Does Fitbit Calculate Calories Burned

 How Does Fitbit Calculate Calories Burned?

All about  How Does Fitbit Calculate Calories Burned : Fitbit devices estimate your daily calorie expenditure by combining your basal metabolic rate (BMR) – the number of calories your body burns during rest to keep vital functions (like breathing, blood circulation, and heartbeat) running smoothly – and your activity data. Note, however, that in some areas, calorie values are replaced by kilojoules.

How does Fitbit Calculate Calories Burn?

A 3-axis accelerometer is used by Fitbit devices to count how many steps you take daily. Furthermore, the sensor allows your device to detect your movement patterns and determine whether your movements are more frequent, longer, or more intense than usual.

The Fitbit tracker calculates calories based on a variety of data collected by the Fitbit, the user, as well as information provided by the user. To measure your daily calorie burn, Fitbit uses this method.


To calculate your BMR, you must know how much energy your body consumes when you are at rest or when not performing any extraneous activities, such as playing sports or running. As you will see, Fitbit calculates a rough estimate of your BMR by using the personal data you provide when filling out your profile, such as your height, gender, weight, and age. Additionally, other factors such as blood pressure and heart rate are often used to determine someone’s BMR.

Your Fitbit will show you burned calories even when you haven’t gone to the gym and have simply been lounging around watching Netflix or Disney+ all day long because of this BMR information. There is always a constant burn of calories in your body.


If you use a Fitbit Aria smart scale, your current weight will be automatically synced to your Fitbit profile each time you weigh yourself, so you won’t have to go and change it each time you gain or lose weight.


While Fitbit devices cannot measure your breath rate and blood pressure, the majority of the Fitbit trackers you wear on your wrist can track your heart rate and sync this information to your Fitbit account to help you estimate how many calories you have burned. The general rule of thumb is that a higher heart rate corresponds to a faster metabolism, whereas a slower heart rate indicates that you’re burning calories at a slower pace.

Several Fitbit trackers on the market can measure your heart rates, such as the Fitbit Ionic, Fitbit Blaze, Fitbit Versa, Fitbit Versa 2, Fitbit Charge 2, Fitbit Charge 3, and the Fitbit Inspire HR.


With all Fitbit trackers, you can record how many steps you take during the day. This technology can be used to determine when you are active but can also be used to detect how much you don’t move.


It is estimated that Fitbit will burn calories for you based on the type of exercise you are doing and how long you spend doing it based on the information you provide. You will add this number to your daily total at the end of the day.

Suppose you log exercises in the Fitbit apps. In that case, the number of calories burned may be exaggerated because your profile will record both your BMR burn as well as the estimated exercise-related burn for that period.

How to Use the Fitbit Calorie Counter

With Fitbit’s apps for iOS and Android, you can manually record your food consumption throughout the day. This feature is also contained in the Fitbit apps for Windows 10, allowing you to track calories manually. With this feature in combination with the calorie burned feature, you will see how many calories you are consuming each day compared to how many calories you have burned throughout the day.

Fitbit calorie counting can be added to your app dashboard by going to Discover > Health & Fitness Stats > Food > Add to Today.

How does my Fitbit device count the steps taken?

Fitbit devices count the steps you take using a 3-axis accelerometer. It is also possible for your device to determine the frequency, duration, intensity, and patterns of your movements by using this sensor.

How does my Fitbit device calculate distance traveled?

To calculate the distance for Fitbit devices, we use the following formula. Depending on your height and gender, your stride length determines the way you walk.

Steps x Stride Length = Distance Traveled

How does my Fitbit device count floors climb?

When you go up in elevation, your Fitbit device detects that you are going higher with an altimeter sensor. As you climb about 10 feet or 3 meters, your device counts one floor as you climb. To estimate how many floors you have climbed, your device uses changes in barometric pressure in conjunction with the steps you take. Fitbit devices do not register floors when you use stationary exercise equipment, such as a StairMaster, treadmill, or when you go down a flight of stairs.

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How does my Fitbit device calculate calories burned?

Fitness trackers use your basal metabolic rate (BMR) – the rate at which you burn calories when at rest to maintain vital body functions (such as breathing, blood circulation, and heart rate) – along with your activity data to calculate your daily calorie burn. Your heart-rate data will also be included in your device to track your heart rate to estimate how many calories you burn during exercise. In Fitbit, you can see the number of calories you burnt in the day from the Fitbit device you have on you.

What are some tips to make sure my Fitbit daily activity is accurate?

  • You must wear the device correctly, either over your wrist or in a clip.
  •  Change the Wrist setting in the Fitbit app if you switch your device to another wrist. 
  • Would you please double-check that the personal information you entered when setting up your Fitbit account (height, weight, sex, and age) is accurate? 
  • It’s possible to track your workout and to see your heart rate data in real-time with the Exercise app on specific devices. To track your movements and see your real-time heart-rate data. This data can better determine calories burned during exercise, especially for activities like. Using this data can better determine the number of calories burned during exercise, especially for activities such as spinning or yoga, where your step count does not necessarily reflect how intense your workout is. Spinning or yoga where your step count might not reflect your intensity level. For more information, please visit How do I track my workouts using my Fitbit device?
  • It would be best if you swung your arm back and forth back as you move when you use your device to count steps when you’re walking or running. When you are pushing a stroller (for instance) with both hands or holding a dog leash with the same arm you wear your device on, consider using GPS to calculate your distance traveled and calories burned more accurately. 

What does Fitbit measure?

Fitness band manufacturer Fitbit offers various exercise bands, smartwatches, and accessories that you can use to track your steps, exercise, heart rate, weight, and more. You can also download the company’s mobile apps for iOS and Android and access a dashboard in your browser where you can monitor your progress over time and manually log your workouts.

Can I trust Fitbit calories burned?

With the Fitbit tracker, you can log your daily steps very accurately because it uses an accelerometer to count your steps. There is a range of uncertainties when it comes to the Fitbit Surge in particular. According to a series of studies from 2017, it can have an error margin of around 27% when counting calories burned throughout the day and during exercise.

How does Fitbit calculate activity?

Your Fitbit device will allow you to calculate active minutes based on heart rate data for activities that do not count toward steps, such as weightlifting, yoga, and rowing. The number of active minutes you spend on these activities will be lower if your device does not track your heart rate. On my Fitbit device, what is my active minute’s goal for the day?

Does Fitbit calculate weight loss?

As well as providing its users with an automated calorie burn goal, Fitbit also allows users to customize their calorie burn goals. Keep a record of what you eat and how often you exercise, but do not include the number of calories you burn or consume. In the long run, losing weight for many dieters is still too complex and time-consuming for even the most sophisticated tracking device.

Does Fitbit count steps if the arms aren’t moving?

During the time your arm moves, you can count your steps accurately using the wrist-based accelerometer. Fitbit will track your actions even if your arm isn’t moving, but the step count won’t be accurate if your arm isn’t moving.

dimi jano
I am blogger and Content writer as well. I am working online since last couple of years.

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