How Does Fitbit Calculate Calories Burned

Counting calories has become an essential part of maintaining a healthy lifestyle, and fitness trackers, like Fitbit, have made it simpler than ever. But have you ever wondered, how does Fitbit calculate calories burned? Let’s dive into the technology behind it.

Understanding Fitbit’s Calorie Calculation Algorithm

Fitbit uses a combination of your personal data and advanced sensors to estimate the number of calories you burn throughout the day. When you set up your device, Fitbit collects important details such as your age, gender, weight, height, and activity level. This data forms the baseline for its calorie calculations.

Fitbit tracks your calorie burn in two key ways:

1. Basal Metabolic Rate (BMR): This is the number of calories your body burns at rest just to maintain vital functions like breathing and circulation. Fitbit uses your personal info to calculate your BMR, which accounts for approximately 60%-70% of your daily calorie expenditure.

2. Activity-Based Calories: Fitbit’s built-in sensors, including accelerometers and heart rate monitors, measure your movements and heart rate during physical activities. These readings help the device estimate how many additional calories you burn from walking, running, exercising, or even day-to-day activities like cleaning or shopping.

By combining your BMR and activity-based calories, Fitbit creates a comprehensive picture of your total calorie burn for the day. While the estimates are not 100% accurate, they provide a helpful benchmark for tracking your fitness progress.

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