🏋️ Calories Burned Calculator

Calculate how many calories you burn during exercise using MET (Metabolic Equivalent of Task) values. Choose from 40+ activities across walking, cycling, swimming, gym, sports, and everyday activities.

Weight (kg)

Duration (minutes)

Activity

What is a Calories Burned Calculator?

A calories burned calculator estimates the energy expenditure of physical activity using MET (Metabolic Equivalent of Task) values — a standardised measure of how many times more calories an activity burns relative to sitting quietly at rest (1 MET). By multiplying MET by body weight and exercise duration, the formula gives a personalised estimate of total calories burned: Calories = MET × weight (kg) × duration (hours).

MET values are sourced from the Compendium of Physical Activities, a regularly updated research database first published by Barbara Ainsworth and colleagues in 1993 and revised in 2000 and 2011. The compendium assigns MET values to over 800 activities based on oxygen consumption data collected during standardised exercise testing. Light activities (less than 3 MET) include walking slowly and cooking; moderate activities (3–6 MET) include brisk walking and leisure cycling; vigorous activities (above 6 MET) include running, swimming laps, and HIIT workouts.

The MET-based formula provides a reasonable population-level estimate, but individual energy expenditure varies considerably. Trained athletes burn fewer calories for the same activity than untrained individuals because their bodies are more metabolically efficient. Body composition also matters — muscle tissue has a higher resting metabolic rate than fat tissue, so two people of the same weight but different body compositions burn calories at different rates. These estimates are most useful as a planning guide rather than a precise measurement.

MET Calorie Formula

Calories = MET × weight (kg) × duration (hours)

MET (Metabolic Equivalent of Task) represents the ratio of energy expended during an activity relative to sitting at rest (1 MET = 1 kcal/kg/hour). MET values are from the Compendium of Physical Activities (Ainsworth et al., 2011).

How to Use the Calories Burned Calculator

1

Enter Your Weight

Enter your body weight in kg or lbs. Your weight directly affects calorie expenditure — heavier individuals burn more calories for the same activity.
2

Select Your Activity

Choose from 40+ activities grouped by category. Each activity has a specific MET value based on its intensity.
3

Enter Duration

Enter how many minutes you performed the activity. Use the total active time, excluding rest periods.
4

View Your Burn

See total calories burned, the MET intensity level, and calories per minute. Compare to common food items for context.

Example Calculation

A 70 kg person running at 6 mph (MET 9.8) for 30 minutes:

Duration in hours = 30 ÷ 60 = 0.5 hours

Calories = 9.8 × 70 × 0.5

Calories = 343 kcal

Per minute = 343 ÷ 30 = 11.4 kcal/min

How the Calories Burned Calculator Works

Formula, assumptions, and calculation steps for this health tool.

Methodology

Health calculators use published screening formulas and common planning rules to estimate body, nutrition, pregnancy, or fitness metrics from user inputs.

Calculation Steps

Enter the personal measurements requested by the tool.
Convert height, weight, age, dates, or activity inputs to standard units.
Apply the health or fitness formula for the selected metric.
Show the estimate with practical ranges or interpretation where available.

Assumptions and Limits

Results are educational estimates, not diagnosis or medical advice.
Individual factors such as medication, pregnancy, and medical history can change interpretation.
Consult a clinician for personal health decisions.

Reference basis: Common public-health and sports-science screening formulas.

Frequently Asked Questions

What is MET (Metabolic Equivalent of Task)?

MET is a unit that measures the energy cost of physical activities relative to sitting at rest (1 MET = 1 kcal/kg/hour). An activity with MET 4 burns 4 times as many calories as sitting. MET values come from the Compendium of Physical Activities, a widely used research database.

How accurate is this calculator?

The MET formula provides a reasonable estimate but individual calorie burn varies by fitness level, age, and metabolism. Well-trained athletes burn fewer calories for the same activity than beginners, because their bodies are more efficient. Calorie counts can vary ±20% from actual expenditure.

Which exercise burns the most calories?

High-intensity activities have the highest MET values and burn the most calories per hour. Running at 8 mph (MET 11.8), vigorous swimming (MET 9.8), and HIIT (MET 8.0) are among the top calorie burners. Total calories also depend on duration — a longer moderate session can burn more than a short intense one.

What is the difference between calories burned and fat burned?

Calories burned refers to total energy expenditure during exercise. Fat burned depends on the proportion of energy coming from fat vs carbohydrates. Lower-intensity exercise burns a higher percentage of fat, but high-intensity exercise burns more total calories and more total fat in the same time period. Overall calorie deficit is the primary driver of fat loss.

Real-World Applications

⚖️

Calorie Deficit Planning

People tracking weight loss combine daily calorie intake with exercise calories burned to calculate their net daily deficit — the combination of eating less and moving more is more effective than either alone.

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Endurance Sport Fuelling

Marathoners, cyclists, and triathletes use calorie burn estimates to plan in-race nutrition: a 70 kg runner burning 700 kcal/hour needs ~60g of carbohydrate per hour to maintain performance.

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Muscle Building (Lean Bulking)

Athletes building muscle calculate their exercise energy expenditure to ensure they eat enough above TDEE without excessive fat gain — critical for competitive bodybuilders in the off-season.

📱

Fitness App Tracking

Fitness apps (Apple Health, Google Fit, Fitbit) use MET-based algorithms to estimate calories burned from step count, heart rate, and activity classification throughout the day.

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Cardiac Rehabilitation

Cardiac rehab programmes use MET values to prescribe safe exercise intensity — patients are often restricted to activities below a certain MET threshold to avoid cardiac stress during recovery.

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Sports Science Testing

Exercise physiologists use MET values alongside VO₂ max testing to design training zones and quantify the energy cost of different training blocks in periodised athletic programmes.

Common Mistakes

Eating Back All Exercise Calories

MET-based calorie estimates (and wearable trackers) tend to overestimate exercise burn by 20–50%. Eating back 100% of estimated exercise calories often erases the calorie deficit and stalls weight loss.

Confusing Total Calories Burned with Extra Calories Burned

The formula outputs total calories including what you would have burned resting. Your extra burn from exercise is (MET − 1) × weight × duration — the base metabolic rate is not "new" calorie burning.

Using the Wrong Weight Unit

The MET formula requires weight in kilograms. Entering weight in pounds without converting produces a result 2.2× too low. This calculator handles conversion automatically — but verify your unit selection.

Overestimating Intensity

Selecting a higher-intensity MET value than your actual effort inflates the calorie estimate. Running at 5 mph has a MET of 8.3; if you are actually jogging at 4 mph (MET 6.0), the difference is substantial.

Ignoring Rest Periods

Entering total session time including warm-up, cool-down, and rest periods — especially for interval or HIIT training — overstates the active burn. Use only the active exercise duration.

Calories Burned per Hour by Activity (70 kg person)

Activity	MET	kcal/hour	Intensity
Yoga	2.5	175	Light
Walking 3 mph	3.5	245	Moderate
Cycling (leisure)	4.0	280	Moderate
Swimming (recreational)	6.0	420	Moderate–Vigorous
HIIT	8.0	560	Vigorous
Running 6 mph	9.8	686	Vigorous
Running 8 mph	11.8	826	Very vigorous

References

Ainsworth, B. E. et al. 2011 Compendium of Physical Activities. Medicine & Science in Sports & Exercise, 2011.
American College of Sports Medicine. ACSM's Guidelines for Exercise Testing and Prescription, 11th ed. Lippincott, 2021.
World Health Organization. Global Recommendations on Physical Activity for Health. WHO, 2010.
Heyward, V. H. & Gibson, A. L. Advanced Fitness Assessment and Exercise Prescription, 7th ed. Human Kinetics, 2014.
Swain, D. P. & Franklin, B. A. Comparison of Cardioprotective Benefits of Vigorous vs Moderate Intensity Aerobic Exercise. American Journal of Cardiology, 2006.