🔥Calorie Burn Calculator

A calorie burn calculator gives you a science-based estimate of your energy expenditure during physical activity. If you have ever asked "how many calories do I burn exercising," the answer depends on three variables: the type of activity, the intensity, and your body weight. This calculator uses MET values from the Compendium of Physical Activities, the gold standard reference used in exercise science research, to generate estimates for running, walking, cycling, swimming, and dozens of other activities.

Calories Burned by Activity and Body Weight Calculator

The MET value, or Metabolic Equivalent of Task, is the foundation of any calories burned by activity and body weight calculator. One MET represents the energy cost of sitting quietly, approximately 1 kilocalorie per kilogram of body weight per hour. An activity rated at 8 MET burns eight times the calories of sitting still for the same duration.

The calorie burn formula is straightforward: calories burned = MET value times body weight in kilograms times duration in hours. Body weight is a direct multiplier in this equation, which means a 200-pound (91 kg) person burns roughly one-third more calories doing the same activity at the same pace as a 150-pound (68 kg) person. This is why calorie calculators always ask for your weight and why heavier individuals often see faster initial weight loss from the same exercise routine.

Key MET reference points for common activities at moderate intensity:

• Walking (3 mph): MET 3.5
• Cycling (leisure): MET 8
• Running (moderate pace): MET 8.5
• Swimming (moderate effort): MET 7
• Jump rope: MET 11
• CrossFit / HIIT: MET 9
• Yoga: MET 4
• Weight training: MET 5

How Many Calories Burned Running Walking and Cycling

Running, walking, and cycling are the three most common aerobic exercises, and they differ significantly in their energy expenditure per hour. For a 155-pound (70 kg) person at moderate intensity:

• Running at moderate pace: approximately 595 calories per hour (MET 8.5)
• Cycling at moderate pace: approximately 560 calories per hour (MET 8)
• Walking at 3.5 mph: approximately 245 calories per hour (MET 3.5)

An important nuance is the difference between calories burned per hour and calories burned per mile. Running burns roughly 100 calories per mile for a 155-pound person, while walking at the same distance burns about 80 to 90 calories per mile. The per-hour rate is much higher for running, but the per-distance rate is more similar than most people expect. The practical advantage of running is time efficiency: you cover more distance and burn more total calories in 30 minutes than walking does in the same window.

Cycling calories burned depend heavily on terrain and resistance. Road cycling at 14 to 16 mph and stationary cycling on a moderate resistance setting use similar energy, but indoor cycling classes with high-intensity intervals can push into vigorous-intensity MET values above 12, approaching running in caloric expenditure.

Exercise Calorie Calculator by Duration

Using this exercise calorie calculator by duration is straightforward: enter your activity, intensity level, duration in minutes, and body weight. The result scales linearly with time. A 30-minute run at moderate intensity burns approximately half the calories of a 60-minute run at the same pace and weight.

Intensity classification matters significantly. The difference between light, moderate, and vigorous intensity can more than double the MET value and thus the calories burned for the same activity. Running at a light jog (MET 6) versus a vigorous pace (MET 12) burns twice as many calories per minute. HIIT workouts and CrossFit achieve very high MET values by cycling rapidly between vigorous efforts and short rest periods, producing high calorie burns in short sessions.

The most calorie-efficient exercises per hour at vigorous intensity for a 155-pound person:

• Jump rope (vigorous): approximately 980 calories per hour
• Running (vigorous): approximately 840 calories per hour
• CrossFit / HIIT: approximately 980 calories per hour
• Swimming (vigorous): approximately 700 calories per hour
• Cycling (vigorous): approximately 840 calories per hour

However, the best exercise for calorie burn is the one you will actually do consistently. A 45-minute walk performed five days a week outperforms a single high-intensity session that gets skipped repeatedly due to difficulty or injury. Sustainable aerobic exercise habits produce far greater long-term energy expenditure than sporadic intense workouts.

Exercise, Energy Expenditure, and Weight Management

One pound of body fat stores approximately 3,500 kilocalories. A daily calorie deficit of 500 kcal through some combination of reduced food intake and increased exercise produces roughly one pound of weight loss per week. Exercise contributes to this deficit but is rarely sufficient on its own without dietary changes, since a 30-minute jog might burn 300 calories while a single high-calorie meal easily delivers 800 or more.

Exercise has profound benefits beyond raw calorie burn: aerobic exercise improves cardiovascular health, preserves lean muscle mass during weight loss, improves insulin sensitivity, and produces psychological benefits including reduced anxiety and improved mood. Weight training in particular raises resting metabolic rate by increasing muscle mass, contributing to higher baseline energy expenditure throughout the day even outside of workout sessions.