Calories Burned Calculator
Scientific precision for your fitness journey. Use our MET-based estimator to determine exactly how much energy your body expends across 50+ activities.
Activity Data
MET Intensity Log
Select your activity and duration to see energy expenditure estimate.
The MET Methodology
The Metabolic Equivalent of Task (MET) is the standard metric used by exercise physiologists to quantify intensity. 1 MET is equal to the energy used by a person at rest (3.5 ml of oxygen per kilogram of body mass per minute).
By multiplying an activity's MET value by your weight and the duration of exercise, we can mathematically calculate your total caloric load. For instance, running at 6mph has a MET of 9.8, burning nearly ten times the energy of sitting still.
Standard Calculation Logic
Activity Intensity Benchmarks
The "Afterburn"
Effect Explained
High-intensity exercise triggers EPOC (Excess Post-exercise Oxygen Consumption). This means your metabolic rate remains elevated for hours after your workout as your body works to restore cellular homeostasis. While your screen might show 500 calories burned, the total metabolic impact can be 10-15% higher.
Exercise Physiology FAQ
Does weight impact calories burned?
Yes. A person who weighs more uses more energy to move their body through space. This is why METs are calculated relative to body weight.
Are trackers 100% accurate?
No calculator or wearable is 100% perfect. However, using standardized MET values is widely considered the most reliable mathematical estimation available to the public.
Why is HIIT so efficient?
High-intensity intervals push you into the anaerobic zone, which maximizes the Afterburn effect (EPOC) and forces your body to adapt at a cellular level faster than steady-state cardio.
Is heart rate monitoring better?
Heart rate provides a real-time proxy for intensity. When combined with MET values, it provides the most comprehensive view of your workout's caloric and metabolic costs.