A MET (Metabolic Equivalent of Task) is a physiological measure where 1 MET equals the energy used while sitting quietly (about 3.5 mL oxygen per kg per minute). Walking at a moderate pace has a MET of 3.5, running is 8.0, and jumping rope is 12.0. Activities below 3.0 METs are considered light, 3.0-6.0 moderate, and above 6.0 vigorous. MET values were developed through laboratory oxygen consumption measurements and are the global standard for quantifying physical activity intensity.

Are calorie burn estimates accurate?

MET-based calorie estimates are accurate to within 15-20% for most people, according to research in the Journal of Sports Sciences. Key factors affecting accuracy include fitness level (trained athletes burn fewer calories at the same MET), body composition (more muscle means higher calorie burn), exercise intensity variation, and environmental conditions. Heart rate monitors improve accuracy to 10-15%, and indirect calorimetry (measuring exhaled gases) is the gold standard at 5% accuracy.

Which exercise burns the most calories?

Jumping rope (MET 12.0) burns the most calories per minute at approximately 14 calories per minute for a 70 kg person, followed by stair climbing (MET 9.0, ~10.5 cal/min), spinning (MET 8.5, ~10 cal/min), and running at 6 mph (MET 8.0, ~9.3 cal/min). However, both the CDC and WHO emphasize that the best exercise for health is one you enjoy and can sustain consistently, as adherence matters more than peak intensity.

How many calories should I burn per day through exercise?

The WHO recommends 150-300 minutes of moderate activity weekly, which burns approximately 1,000-2,000 calories through exercise. For weight loss, the American College of Sports Medicine suggests burning 250-500 extra calories per day through physical activity. A 70 kg person achieves 300 calories with about 35 minutes of running or 55 minutes of brisk walking. Use our TDEE calculator to determine your total daily energy needs.

Does walking really burn significant calories?

Walking is one of the most accessible and effective calorie-burning activities. At a moderate pace (3.5 mph, MET 3.5), a 70 kg person burns approximately 245 calories per hour, or about 120 calories in a 30-minute walk. The CDC reports that walking 10,000 steps daily (about 5 miles) burns 300-500 extra calories, which is sufficient for maintaining a healthy weight. Walking also has lower injury rates than running, making it sustainable long-term.

Calories Burned Calculator

Q: How are calories burned during exercise calculated?

Calories burned are estimated using the MET formula: Calories = MET x weight in kg x duration in hours. MET values come from the Compendium of Physical Activities maintained by Arizona State University, which catalogs over 800 activities based on measured oxygen consumption. For example, a 70 kg person running (MET 8.0) for 30 minutes burns 8.0 x 70 x 0.5 = 280 calories. The formula is accurate to within 15-20% for most individuals.

Quick Answer

Calories burned during exercise are estimated with the MET formula: kcal = MET × body weight (kg) × duration (hours). For example, running at 6 mph has a MET of about 9.8, so a 70 kg person burns roughly 9.8 × 70 × 0.5 ≈ 343 kcal in 30 minutes. MET values come from the Compendium of Physical Activities.

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How the Calories Burned Calculator Works

A calories burned calculator estimates the energy you expend during physical activity using the MET (Metabolic Equivalent of Task) method. MET values represent how much energy an activity uses relative to sitting quietly at rest (1 MET). The values used in this calculator come from the Compendium of Physical Activities, maintained by Arizona State University, which catalogs over 800 activities based on measured oxygen consumption data.

The World Health Organization recommends 150-300 minutes of moderate-intensity aerobic activity per week for adults, which burns approximately 1,000-2,000 calories through exercise. This calculator covers over 30 common activities so you can compare energy expenditure across different workout types. For comprehensive fitness planning, pair this with our TDEE calculator and macro calculator.

The Calorie Burn Formula

The standard formula used by exercise physiologists is:

Calories Burned = MET x Weight (kg) x Duration (hours)

One MET equals approximately 3.5 mL of oxygen consumed per kilogram of body weight per minute, which translates to roughly 1 kcal per kg per hour. The formula was validated in research published in the Medicine and Science in Sports and Exercise journal.

Worked example: A 70 kg (154 lb) person running (MET 8.0) for 30 minutes: Calories = 8.0 x 70 x 0.5 = 280 calories. The same person walking (MET 3.5) for 30 minutes burns 3.5 x 70 x 0.5 = 122.5 calories, demonstrating that running burns 2.3 times more calories per minute than walking.

Key Terms You Should Know

MET (Metabolic Equivalent of Task): A measure of exercise intensity where 1.0 = resting metabolic rate. Light activity is 1.5-3.0 METs, moderate is 3.0-6.0 METs, and vigorous is 6.0+ METs.
EPOC (Excess Post-Exercise Oxygen Consumption): The "afterburn effect" where your body continues burning calories at an elevated rate for hours after intense exercise, adding 6-15% to total calorie expenditure.
VO2 Max: Maximum oxygen uptake during exercise, measured in mL/kg/min. Higher VO2 max indicates better cardiovascular fitness. Use our VO2 max calculator to estimate yours.
BMR (Basal Metabolic Rate): Calories burned at complete rest, typically 1,200-2,000 per day. Exercise calories are in addition to BMR.
Net Calories: Total calories burned during exercise minus the calories you would have burned at rest during the same period. Running at MET 8.0 has a net MET of 7.0.

Calories Burned by Activity (30 Minutes, 70 kg Person)

Activity	MET	Calories (30 min)	Intensity Level
Walking (3.5 mph)	3.5	123	Moderate
Cycling (moderate)	7.5	263	Vigorous
Running (6 mph)	8.0	280	Vigorous
Swimming (laps)	6.0	210	Vigorous
Jumping Rope	12.0	420	Very Vigorous
Yoga	3.0	105	Light-Moderate
Weight Training	5.0	175	Moderate-Vigorous

Source: MET values from the Compendium of Physical Activities, Arizona State University. Calorie values calculated for a 70 kg reference person.

Practical Calorie Burn Examples

Example 1 - Weight loss workout: A 85 kg (187 lb) person wants to burn 500 calories per session. Running at MET 8.0: Time needed = 500 / (8.0 x 85) = 0.735 hours = 44 minutes. Swimming at MET 6.0: Time = 500 / (6.0 x 85) = 0.98 hours = 59 minutes. The CDC recommends aiming for a 500-750 calorie daily deficit (diet + exercise) for sustainable weight loss of 0.5-0.75 kg per week.

Example 2 - Office worker daily activity: A 65 kg person walks to work (20 min, MET 3.5), takes the stairs (5 min, MET 9.0), and does a lunchtime yoga class (45 min, MET 3.0). Total: (3.5 x 65 x 0.33) + (9.0 x 65 x 0.083) + (3.0 x 65 x 0.75) = 75 + 49 + 146 = 270 extra calories burned. Track your daily activity with our walking calorie calculator.

Example 3 - Weekend warrior: A 75 kg person does a 60-minute HIIT class (MET 8.0) on Saturday and a 90-minute hike (MET 6.0) on Sunday. Saturday: 8.0 x 75 x 1.0 = 600 calories. Sunday: 6.0 x 75 x 1.5 = 675 calories. Weekend total: 1,275 calories, meeting the WHO minimum weekly recommendation in just two sessions.

Tips for Maximizing Calorie Burn

Increase intensity over duration: A 30-minute run (MET 8.0) burns more calories than a 60-minute walk (MET 3.5) for most people. High-intensity intervals can boost EPOC, adding 6-15% more calories burned after the workout.
Add resistance training: Muscle tissue burns approximately 6 calories per pound per day at rest versus 2 calories for fat. Building muscle through strength training increases your baseline metabolic rate long-term.
Track with heart rate: For more personalized estimates, use a heart rate monitor. The target heart rate calculator can help you find your optimal training zones.
Include NEAT (Non-Exercise Activity Thermogenesis): Standing, fidgeting, taking stairs, and walking during phone calls can add 200-500 calories daily. Small movements accumulate significantly over time.
Stay hydrated: Dehydration reduces exercise performance by 10-20%, which directly reduces calorie expenditure. Drink 500 mL of water 2 hours before exercise and 200 mL every 15-20 minutes during activity.

Disclaimer: This calculator is for informational purposes only and does not constitute medical or health advice. Consult a healthcare professional before starting any exercise program or making dietary changes.