Calories Burned Calculator
Estimate how many calories you burn during exercise and physical activities. Select from 12 popular activities, enter your weight and duration, and get an instant MET-based calorie estimate with food equivalents.
How the Calories Burned Calculator Works
Understanding calorie expenditure is essential for anyone managing their weight, training for athletic performance, or simply trying to maintain a healthy lifestyle. This calculator uses the Metabolic Equivalent of Task (MET) system, a scientifically validated method published by the American College of Sports Medicine, to estimate energy expenditure across a wide range of physical activities.
Calorie Burn Formula (MET Method)
Calories Burned = MET × Weight (kg) × Duration (hours)
MET (Metabolic Equivalent of Task) represents the energy cost of an activity relative to rest. A MET of 1 equals the energy expenditure at rest (approximately 1 kcal/kg/hour). Running at a moderate pace has a MET of 9.8, meaning it burns roughly 9.8 times more energy than sitting still.
Understanding MET Values
The Compendium of Physical Activities, maintained by researchers at Arizona State University, catalogues MET values for over 800 activities. MET values range from 0.9 (sleeping) to 23 (running at a 4-minute mile pace). The values used in this calculator represent moderate-intensity versions of each activity. Actual calorie burn varies based on intensity, fitness level, body composition, environmental conditions, and individual metabolic differences.
MET Values Used in This Calculator
Running: 9.8 MET (approximately 6 mph pace). Walking: 3.5 MET (moderate 3.5 mph pace). Cycling: 7.5 MET (moderate effort, 12-14 mph). Swimming: 8.0 MET (moderate freestyle). HIIT/CrossFit: 12.0 MET (vigorous circuit training). Weight Lifting: 6.0 MET (general moderate effort). Yoga: 3.0 MET (hatha yoga). Dancing: 5.5 MET (general aerobic dance). Rowing: 7.0 MET (moderate effort). Soccer: 7.0 MET (casual game). Basketball: 6.5 MET (recreational). Tennis: 7.3 MET (singles match).
Real-World Calorie Burn Examples
A 70 kg person running for 30 minutes burns approximately 343 calories (9.8 × 70 × 0.5). The same person walking for 30 minutes burns around 123 calories. This 2.8x difference illustrates why running is one of the most time-efficient calorie-burning activities. However, walking is more sustainable for longer durations and carries lower injury risk, meaning total daily calorie burn from walking can rival or exceed running for many people.
Food Equivalents: Putting Calories in Perspective
Translating calorie numbers into food equivalents helps make abstract numbers tangible. A 300-calorie workout is roughly equivalent to one slice of pepperoni pizza (285 cal), 2.5 medium bananas (105 cal each), 1.5 cans of regular soda (140 cal each), or about 40 minutes of moderate walking. These comparisons are not meant to encourage exercising to "earn" food but rather to help you understand the energy balance equation.
Factors That Affect Calorie Burn
Body weight is the single largest factor: heavier individuals burn more calories performing the same activity because they must move more mass. Fitness level matters too. Well-trained athletes are more mechanically efficient, meaning they may burn slightly fewer calories per minute at a given pace compared to beginners. Age, muscle mass percentage, ambient temperature, and altitude also influence total energy expenditure. This calculator provides a solid estimate, but individual results may vary by 10 to 20 percent.
Using Calorie Data for Weight Management
To lose one pound of body fat, you need a cumulative deficit of approximately 3,500 calories. If your exercise burns 400 calories per session and you work out five times per week, that is 2,000 calories per week from exercise alone, enough to lose roughly half a pound per week without any dietary changes. Combining exercise with modest calorie reduction (300-500 calories per day) creates a sustainable deficit for healthy weight loss of 1 to 2 pounds per week.