Calculate calories burned for any exercise — running, cycling, walking, swimming, weight lifting, stair climbing, burpees, elliptical, jump rope, sauna, and more. Uses the ACSM-validated MET formula with body weight and duration. Also includes heart rate-based calorie estimation.
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Verified: ACSM Compendium of Physical Activities 2011 & Updated MET Values 2026
MET Formula: Calories = MET × Body Weight (kg) × Duration (hours) — sourced from the ACSM Compendium of Physical Activities.
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Pace determines the MET intensity value
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Uses the heart rate-based Keytel (2005) formula — more personalized than MET for cardio workouts.
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Calories Burned
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⚠️ Disclaimer: Calorie estimates are based on MET values from the ACSM Compendium of Physical Activities and carry a ±10-20% individual margin. Actual calorie burn varies with fitness level, age, temperature, and metabolic rate. Consult a registered dietitian or sports physician for personalized nutrition guidance.
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📚 Sources & Methodology
All MET values are sourced from the Compendium of Physical Activities (Ainsworth et al., 2011, Medicine & Science in Sports & Exercise) — the gold standard reference used by the American College of Sports Medicine (ACSM). The heart rate-based formula is derived from Keytel et al. (2005), Journal of Sports Sciences. Calorie estimates represent gross calorie expenditure including basal metabolic rate during exercise.
Ainsworth, B.E. et al. (2011). Compendium of Physical Activities: A second update of codes and MET values. Medicine & Science in Sports & Exercise, 43(8), 1575-1581.
Keytel, L.R. et al. (2005). Prediction of energy expenditure from heart rate monitoring during submaximal exercise. Journal of Sports Sciences, 23(3), 289-297.
American College of Sports Medicine (2022). ACSM's Guidelines for Exercise Testing and Prescription, 11th Edition.
How to Calculate Calories Burned During Exercise
Whether you want to know how many calories you burn running a mile, cycling for an hour, swimming laps, climbing stairs, or lifting weights — every calculation starts from the same validated foundation: the MET formula. MET (Metabolic Equivalent of Task) is a standardized, peer-reviewed measure of exercise intensity used by sports scientists, personal trainers, and the American College of Sports Medicine worldwide.
The Universal Calorie Burn Formula
Calories Burned = MET × Body Weight (kg) × Duration (hours)Example — Running 6 mph for 30 min, 70 kg person:= 10.0 × 70 × 0.5 = 350 caloriesLbs to kg conversion: weight (lbs) ÷ 2.205 = weight (kg)
What Is MET and Why It Matters
One MET equals the energy your body uses at complete rest — approximately 1 kcal per kilogram per hour. An activity with MET 10 burns 10 times the energy of resting. This is why a 200-lb person burns significantly more calories than a 130-lb person doing the exact same workout for the same duration: the formula scales linearly with body weight. Every MET value in our calculator comes from the Compendium of Physical Activities, a database of over 800 activities maintained by Arizona State University and updated most recently in 2011.
Running Calorie Calculator — How Many Calories Does Running Burn?
Running is the highest-calorie-burn exercise per minute accessible to most people. The calories burned running depend on your pace (which determines MET intensity), your body weight, and the distance or duration. A rule of thumb: you burn roughly 100 calories per mile at a moderate pace if you weigh around 155 lbs (70 kg). Heavier runners burn more per mile; lighter runners burn less.
Calories burned cycling depend on speed, terrain, and whether you are on a road bike or stationary bike. Road cycling at 14-16 mph burns approximately 560-700 calories per hour for a 155-lb rider. Stationary bike workouts burn slightly fewer calories at the same perceived effort because real-world cycling adds wind resistance and terrain variability. Mountain biking (MET 8.5) burns comparable calories to road cycling at 14-16 mph due to technical effort demands.
Walking burns fewer calories per minute than running but remains an effective fat-burning activity because it is sustainable for longer durations. At a brisk 3.5 mph walk (MET 4.3), a 155-lb person burns about 300 calories per hour. Stair climbing dramatically increases calorie burn — with a MET of 8.8, it burns nearly as many calories as running at 6 mph. Climbing 10 flights of stairs burns approximately 50-80 calories depending on body weight. Standing versus sitting burns about 50 extra calories per hour (MET 2.0 vs 1.3) — over an 8-hour workday, standing burns approximately 300-400 extra calories compared to sitting.
Swimming Calorie Calculator — Calories Burned in the Pool
Swimming is a full-body calorie burner and the ideal exercise for those with joint issues. The stroke type significantly affects calorie burn: breaststroke has the highest MET (10.3) due to its drag-heavy mechanics, butterfly requires explosive effort (MET 13.8 for competitive swimmers), and backstroke is the most efficient (MET 6.0) with the lowest calorie burn per minute. A 155-lb person swimming freestyle at moderate intensity burns approximately 280 calories per 30 minutes.
Calories Burned Weight Lifting vs Cardio
Weight lifting burns fewer calories during the session than cardio (general training: MET 3.5 vs running MET 10+), but provides a significant afterburn effect known as EPOC (Excess Post-exercise Oxygen Consumption). After a vigorous strength training session, your metabolism remains elevated for 14-72 hours, burning an additional 50-150 calories. Circuit training and CrossFit-style workouts (MET 8.0) bridge the gap between traditional strength training and cardio, delivering both muscle stimulus and elevated cardiovascular calorie burn.
Burpees are among the highest-intensity bodyweight exercises at MET 8.0, burning approximately 10-15 calories per minute depending on your pace and body weight. A 20-minute burpee session burns 200-350 calories. Jump rope is even more intense at MET 11.8 — comparable to running at 8 mph — making it one of the most calorie-efficient exercises you can do with no equipment. The elliptical burns fewer calories than running at the same perceived effort (MET 5.0-8.0 vs running MET 10+) because it partially supports body weight, but it is significantly easier on joints.
Sauna Calories Burned — The Real Numbers
Sauna sessions do burn some extra calories through elevated heart rate and cardiovascular response to heat, but the effect is modest. A 155-lb person sitting in a sauna burns approximately 50-100 calories per 30 minutes — roughly 1.5-2x their resting metabolic rate. The majority of weight lost immediately after a sauna is water weight that returns when you rehydrate. Saunas provide documented health benefits (cardiovascular, recovery, stress reduction) but should not be relied upon as a primary calorie-burning strategy.
Heart Rate-Based Calorie Calculation
The heart rate method (Keytel, 2005) provides a more individualized calorie estimate for steady-state cardio by accounting for your age, sex, weight, and actual heart rate response to exercise. This is particularly useful for activities like spinning or rowing where MET values are less precise. The formula: for men: Calories/min = (-55.0969 + 0.6309 x HR + 0.1988 x weight(kg) + 0.2017 x age) / 4.184. For women: Calories/min = (-20.4022 + 0.4472 x HR - 0.1263 x weight(kg) + 0.074 x age) / 4.184.
Factors That Affect How Many Calories You Burn
Body weight is the largest variable — heavier individuals burn more calories for every activity. Beyond weight, these factors significantly affect calorie expenditure:
Fitness level: Fitter athletes have more efficient cardiovascular systems and burn fewer calories at the same pace than untrained individuals.
Muscle mass: More muscle = higher resting metabolic rate and greater calorie burn during exercise.
Temperature: Cold weather increases calorie burn slightly as your body works to maintain core temperature.
Terrain & incline: Running or walking uphill significantly increases calorie expenditure. A 10% incline increases calorie burn by approximately 50%.
Age: Metabolic rate declines approximately 1-2% per decade after age 30, reducing calorie burn slightly at the same exercise intensity.
❓ Frequently Asked Questions
A 155-lb (70 kg) person burns approximately 100-120 calories per mile at a moderate 6 mph pace (MET 10). At 5 mph (12 min/mile), the burn is 80-90 calories per mile. A 200-lb (91 kg) person burns 130-150 calories per mile at the same pace. The formula is: Calories per mile = MET x weight (kg) x (1/speed in mph / 60). Use our running tab above for your exact numbers.
At 12-14 mph moderate effort (MET 8): a 155-lb (70 kg) person burns approximately 280 calories in 30 minutes. At 16-19 mph vigorous pace (MET 12): approximately 420 calories. Stationary bike at moderate effort (MET 6.8): approximately 238 calories. The cycling tab in our calculator above gives exact results by speed, bike type, and body weight.
Walking 10,000 steps burns approximately 300-500 calories depending on body weight and walking speed. A 155-lb (70 kg) person walking at 3.5 mph burns about 300-350 calories per 10,000 steps (roughly 5 miles). Uphill walking, carrying weight, or walking faster all increase calorie burn. Use the walking tab above with your duration to get a personalized estimate.
MET (Metabolic Equivalent of Task) is a standardized measure of exercise intensity where 1 MET = energy burned at rest. Calories burned = MET x body weight (kg) x duration (hours). Running at 6 mph = MET 10, meaning it burns 10x resting metabolic rate. MET values for 800+ activities are published in the Compendium of Physical Activities (Ainsworth et al., 2011) — the source for all values in this calculator.
Freestyle swimming at moderate pace (MET 8) burns approximately 280 calories in 30 minutes for a 155-lb person. Breaststroke (MET 10.3) burns about 360 calories per 30 minutes. Backstroke (MET 6.0) burns about 210 calories. Butterfly is the most intense stroke — competitive swimmers burn 400+ calories per 30 minutes. Water temperature also affects burn: colder water increases calorie expenditure slightly.
Burpees burn approximately 10-15 calories per minute for a 155-lb person, or roughly 1-1.5 calories per burpee at a rate of 10 per minute. A 20-minute burpee session burns 200-300 calories. At MET 8.0, burpees are equivalent in intensity to vigorous cycling or swimming. Their calorie burn is competitive with running at 6 mph, making them an extremely efficient bodyweight exercise.
Stair climbing burns 8-11 calories per minute with a MET of 8.8 — nearly equal to running at 6 mph. A 155-lb (70 kg) person burns approximately 300-400 calories per 30 minutes of continuous stair climbing. Going up stairs burns 5-10x more calories than going down. Approximately 2-5 calories are burned per floor climbed depending on speed and body weight.
MET-based calculators have approximately ±10-20% error for most individuals. Actual calorie burn varies by fitness level, muscle mass, age, temperature, humidity, and individual metabolic efficiency. Heart rate-based calculations are typically more accurate for cardio (±15% error vs ±20% for MET). Wearable fitness trackers have similar or slightly lower accuracy. For weight management, treat calculator outputs as directional estimates and track real-world results over weeks.
At moderate effort (MET 5.0), a 155-lb (70 kg) person burns approximately 175 calories per 30 minutes on the elliptical. At vigorous effort (MET 8.0), approximately 280 calories. The elliptical burns 20-40% fewer calories than running at the same perceived effort because it supports body weight and reduces impact loading — but this is also why it is much easier on joints and sustainable for longer sessions.
General weight training (MET 3.5) burns approximately 245 calories per hour for a 155-lb (70 kg) person. Vigorous lifting (MET 6.0) burns about 420 calories per hour. Circuit training / CrossFit (MET 8.0) burns approximately 560 calories per hour. Additionally, strength training creates an EPOC (afterburn) effect where metabolism stays elevated for 14-72 hours post-workout, adding an estimated 50-150 extra calories burned.
A 30-minute sauna session burns approximately 50-100 calories for a 155-lb person — roughly 1.5-2x resting metabolic rate (MET ~1.8). Most weight lost immediately in a sauna is water weight that returns when rehydrated. Saunas have real health benefits (cardiovascular, recovery, inflammation reduction) but are not effective as a primary calorie-burning strategy. Combine sauna use with regular exercise for the best results.
Yes — body weight is the single most influential variable in calorie calculations. The MET formula multiplies directly by weight in kg, so a 200-lb (91 kg) person burns approximately 33% more calories than a 150-lb (68 kg) person doing the same exercise for the same time. This is because moving more mass requires more energy and creates greater cardiovascular demand. It is one reason heavier individuals often see faster initial calorie-burn results when starting exercise programs.