How Accurate is Fitbit Calorie Burn?

Posted by Marta on March 1, 2023 Viewed 567 times

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Have you ever wondered how accurate is Fitbit Calorie Burn, and how it tracks the calories?

Fitbit is a popular fitness tracker which millions of people use to monitor their physical activity and overall health.

One of the key features of Fitbit is its ability to track calorie burn. Or the number of calories that a person burns throughout the day as they engage in various activities.

But how accurate is Fitbit calorie burn? The answer is that it depends on a number of factors.

Fitbit Calorie Burn Factors

Firstly, it’s important to note that Fitbit uses a number of metrics to estimate calorie burn. These metrics include heart rate, activity type, intensity, and duration.

These metrics are then combined with the user’s personal information. Details such as age, gender, height, and weight, to calculate an estimate of calorie burn.

In general, studies have found that Fitbit’s calorie burn estimates are relatively accurate for moderate-intensity activities such as walking and jogging. However, the accuracy can vary depending on the type of activity and the user’s individual characteristics.

What do studies say?

For example, a study published in the Journal of Sports Science and Medicine found that Fitbit was relatively accurate for estimating calorie burn during running. However it is less accurate for activities such as cycling and weightlifting.

Similarly, another study published in the Journal of Strength and Conditioning Research found that Fitbit’s calorie burn estimates were less accurate for individuals with higher body mass index (BMI) and lower fitness levels.

It’s also worth noting that Fitbit’s calorie burn estimates are just that – estimates. They are not exact measurements of the number of calories that a person burns.

Additionally, factors such as environmental conditions, genetics, and individual variations in metabolism can also affect calorie burn.

Despite these limitations, Fitbit’s calorie burn estimates can still be a useful tool for monitoring physical activity and overall health. By tracking trends over time, users can gain valuable insights into their fitness level. And make adjustments to their diet and exercise routine as needed.

Other ways to Track Calorie Burn without Fitbit?

Some alternative methods include:

  • Smartphone Apps: There are numerous smartphone apps that can track your physical activity and calorie burn. Examples include MyFitnessPal, Nike Training Club, and Strava.
  • Heart Rate Monitors: Heart rate monitors can be used to track calorie burn by measuring the number of calories burned during exercise based on your heart rate. Examples include Polar, Garmin, and Wahoo.
  • Pedometers: Pedometers can be used to track the number of steps taken, which can then be used to estimate calorie burn. Some smartphones also have built-in pedometers
  • Fitness Trackers: There are a number of fitness trackers on the market that are similar to Fitbit, such as Garmin, Apple Watch, and Samsung Gear.

It’s worth noting that each of these methods has its own limitations. Therefore, they may not be as accurate as more advanced tracking devices like Fitbit.

However, they can still provide a general idea of your physical activity level and calorie burn, which can be useful for monitoring your overall health and fitness.

Additionally, tracking your calorie intake through a food diary or app can also provide insight into your overall calorie balance and help you achieve your weight loss or fitness goals.


In conclusion, while Fitbit’s calorie burn estimates are not 100% accurate. Nevertheless, they can still be a useful tool for tracking physical activity and overall health.

By understanding the limitations of the estimates and combining them with other metrics such as heart rate and activity duration, users can gain valuable insights into their fitness level and make informed decisions about their health and wellness.

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