Calories Burned Calculator

Q: How accurate is the calories burned estimate?

MET-based estimates are within 10–20% of actual expenditure for most people. Accuracy depends on factors like fitness level, body composition, movement efficiency, and environmental conditions. The formula (MET × weight in kg × hours) uses gross energy expenditure, which includes your resting metabolic rate. For more precise tracking, combine this estimate with a heart rate monitor or wearable device.

Q: Does exercise burn calories after the workout ends?

Yes. Excess post-exercise oxygen consumption (EPOC), sometimes called the afterburn effect, means your body continues burning calories at an elevated rate after intense exercise. High-intensity activities like HIIT and heavy weightlifting produce the largest EPOC response — up to 6–15% of total exercise energy expenditure in the hours following the workout. Low-intensity activities produce minimal afterburn.

Q: How many calories should I burn to lose weight?

A pound of body fat stores roughly 3,500 calories. A sustainable calorie deficit of 500–750 calories per day — through a combination of diet and exercise — produces about 1–1.5 pounds of fat loss per week. Exercise alone is a slower path to weight loss than dietary changes, but it preserves muscle mass, improves metabolic health, and makes the deficit more sustainable long-term.

Estimate your calorie burn for 30+ activities using the MET formula from exercise science — so you can match your nutrition to your training.

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How MET-Based Calorie Calculation Works

This calculator uses the Metabolic Equivalent of Task (MET) system to estimate calories burned. One MET represents the energy your body uses at rest — approximately 1 kilocalorie per kilogram of body weight per hour. When you perform an activity with a MET value of 8, you're burning roughly eight times the energy you'd use sitting still.

The core formula is straightforward: Calories = MET × weight (kg) × duration (hours). This is the gross energy expenditure equation used in exercise science and endorsed by the American College of Sports Medicine. It includes your resting metabolic rate — meaning if you sit for an hour and burn 70 calories at rest, those 70 calories are part of the total shown here, not on top of it.

All MET values in this calculator come from the 2011 Compendium of Physical Activities, a peer-reviewed database compiled by researchers at Arizona State University. The compendium catalogs energy costs for over 800 activities, measured through indirect calorimetry (oxygen consumption analysis) across multiple laboratory studies. It's the standard reference used in clinical research, public health studies, and fitness applications worldwide.

Activity Comparison: What Burns the Most?

Not all exercise is created equal when it comes to calorie burn. The MET value tells you how metabolically demanding an activity is relative to rest, and the differences are substantial. Here's how common activities stack up for a 154-pound (70 kg) person exercising for 30 minutes:

High-intensity activities (MET 10+): HIIT training (12.8 MET, ~448 cal/hr), jump rope (11.8 MET, ~413 cal/hr), running at 8 mph (11.8 MET, ~413 cal/hr), running at 7 mph (11.0 MET, ~385 cal/hr), and vigorous cycling (10.0 MET, ~350 cal/hr). These produce the highest calorie burn per minute but also generate the most fatigue and require adequate recovery.

Moderate-intensity activities (MET 5–10): Stair climbing (9.0 MET, ~315 cal/hr), running at 5 mph (8.3 MET, ~291 cal/hr), moderate cycling (8.0 MET, ~280 cal/hr), circuit training (8.0 MET, ~280 cal/hr), swimming (7.0 MET, ~245 cal/hr), and weightlifting vigorous (6.0 MET, ~210 cal/hr). These offer a strong calorie burn with more sustainable effort levels for most people.

Low-intensity activities (MET 2–5): Brisk walking (5.0 MET, ~175 cal/hr), Pilates (3.0 MET, ~105 cal/hr), yoga (2.5 MET, ~88 cal/hr), and stretching (2.3 MET, ~81 cal/hr). Lower calorie burn per minute, but these activities are sustainable for longer durations, produce minimal fatigue, and play important roles in recovery, flexibility, and aerobic base building.

The best exercise for calorie burn is the one you'll actually do consistently. A 30-minute brisk walk every day (875 cal/week) outperforms a single intense HIIT session you skip half the time. Consistency compounds; intensity doesn't, if it leads to burnout or injury.

Exercise and Weight Loss: What the Math Says

A pound of stored body fat contains approximately 3,500 calories of energy. To lose one pound per week through exercise alone, you'd need to burn an extra 500 calories per day — equivalent to about 60 minutes of running at 5 mph for a 154-pound person. That's a significant time commitment, which is why most evidence-based weight loss programs combine dietary changes with exercise.

Exercise contributes to weight loss in ways beyond the immediate calorie burn. Regular physical activity preserves lean muscle mass during a calorie deficit, which maintains your resting metabolic rate. It improves insulin sensitivity, helping your body partition nutrients toward muscle rather than fat storage. And higher-intensity exercise produces EPOC (excess post-exercise oxygen consumption) — an elevated metabolic rate that persists for hours after the workout ends.

The practical approach is to use exercise to create part of your daily calorie deficit — say 200–300 calories through activity — and achieve the rest through dietary adjustments. This is more sustainable than relying entirely on either strategy alone. Use this calculator alongside our TDEE calculator and calorie target calculator to build a complete picture of your energy balance.

Tips for Maximizing Calorie Burn

Increase intensity gradually. Higher MET activities burn dramatically more calories per minute. Progressing from walking (3.5 MET) to jogging (8.3 MET) more than doubles your calorie burn for the same duration. Build up gradually to avoid injury — the 10% rule (increase weekly volume or intensity by no more than 10%) is a reasonable guideline.

Add resistance training. While a single weightlifting session may burn fewer calories than cardio, the muscle mass you build increases your resting metabolic rate over time. Each pound of muscle burns roughly 6 calories per day at rest compared to 2 calories per pound of fat. Over months, this adds up significantly.

Move more throughout the day. Non-exercise activity thermogenesis (NEAT) — fidgeting, walking to meetings, taking stairs, standing while working — can account for 200–900 calories per day. Adding a daily walk and choosing stairs over elevators can rival the calorie burn of several gym sessions per week.

Don't eat back all exercise calories. A common trap is overestimating exercise calorie burn and compensating with extra food. Calorie estimates (including this calculator's) have a margin of error of 10–20%. If you're exercising for weight management, treat calorie burn estimates as approximate and focus on your weekly trend rather than daily balance.

Frequently Asked Questions

What is a MET value?

MET stands for Metabolic Equivalent of Task. One MET equals roughly 1 kcal/kg/hr — the energy cost of sitting quietly. An activity with a MET of 8 burns eight times more energy per kilogram per hour than rest. All MET values in this calculator come from the 2011 Compendium of Physical Activities, a peer-reviewed database of measured energy costs for hundreds of activities.

How accurate is the calories burned estimate?

MET-based estimates are typically within 10–20% of actual expenditure. Accuracy varies with fitness level, body composition, movement efficiency, and environmental conditions like altitude and temperature. The formula uses gross energy expenditure, which includes your resting metabolic rate. For more precise tracking, combine this estimate with a heart rate monitor or wearable device that accounts for your individual physiology.

Does exercise burn calories after the workout ends?

Yes. Excess post-exercise oxygen consumption (EPOC), often called the afterburn effect, means your body continues burning calories at an elevated rate after intense exercise. HIIT and heavy weightlifting produce the largest afterburn — up to 6–15% of the total exercise energy expenditure in the hours following the session. Low-intensity steady-state cardio produces minimal EPOC.

How many calories should I burn to lose weight?

One pound of body fat stores roughly 3,500 calories. A sustainable deficit of 500–750 calories per day — through diet and exercise combined — produces about 1–1.5 pounds of fat loss per week. Exercise alone is a slower path than dietary changes, but it preserves muscle mass and improves metabolic health. Use this alongside our TDEE calculator to see your full energy picture.