How are calories burned during exercise calculated?

Calories burned are commonly estimated using MET values, body weight, and duration. MET represents the energy cost of an activity relative to rest.

Why does body weight affect how many calories I burn?

Heavier individuals usually burn more calories doing the same activity because moving more mass requires more energy.

Which exercise burns the most calories?

Higher-intensity activities that use large muscle groups, such as running, vigorous cycling, and jumping rope, tend to burn the most calories per minute.

How accurate are calorie burn calculators?

They are useful estimates, but individual results vary based on fitness, technique, temperature, terrain, and body composition.

Should I eat back the calories I burn from exercise?

That depends on your goal. For fat loss, many people avoid eating back all exercise calories. For high training volumes, some replacement may be appropriate.

Does muscle mass affect calorie burn during exercise?

Muscle mass has a strong effect on resting metabolism, while total body mass is a major driver of calorie burn during many activities.

Fitness

🔥 Calories Burned Calculator

Calculate calories burned for 100+ activities based on duration, weight, and MET values.

🔥 MET Formula

Formula

MET × weight(kg) × hours

MET = Metabolic Equivalent

Reference

1 MET = resting rate

3.5 ml O₂/kg/min

MET values quantify energy cost relative to rest. Walking is relatively low, while running and HIIT are much higher. Actual calorie burn still depends on weight, fitness, and exercise conditions.

🏃 Activity METs

Walking (brisk)3.5–4.0

Jogging (8km/h)7.0

Cycling (moderate)6.0–8.0

Swimming6.0

Weight training3.0–6.0

HIIT8.0–12.0

💡 Tips

✓Higher weight = more calories
✓HIIT burns more per minute
✓EPOC adds 5–15% post-exercise
✓Consistency > intensity
✓Do not blindly trust gym machine displays

📎 Also Try

⚡TDEE 📉Deficit 👟Running Calories

What to do next

📉

Build Your Deficit

Factor exercise into your overall calorie deficit

→

Why Estimates Vary

Calorie burn estimates are useful, but they are still estimates. Real-world values vary based on fitness, efficiency, temperature, terrain, and movement quality.

Exercise for Weight Loss

Exercise supports weight loss best when paired with diet. It can help preserve muscle and improve overall energy expenditure.

Related Tools

⚡

TDEE Calculator

Calculate your Total Daily Energy Expenditure. The most important number for setting any nutrition goal.

📉

Calorie Deficit Calculator

Calculate your daily calorie deficit to lose weight at a safe, sustainable rate without sacrificing muscle.

❤️

Heart Rate Zone Calculator

Calculate your 5 heart rate training zones based on your maximum heart rate.