Calorie Burn Calculator
Calories Burned
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What is a Calorie Burn Calculator?
A calorie burn calculator estimates the energy you expend during physical activity. Unlike a TDEE calculator (which tells you how many calories you need per day), this tool tells you how many calories a specific workout session uses — useful for tracking exercise, planning nutrition around workouts, or comparing the calorie cost of different activities.
How It Works
This calculator uses the MET (Metabolic Equivalent of Task) method, the standard used in exercise science research. Each activity has a MET value representing its intensity relative to rest:
MET values come from the Compendium of Physical Activities, the standard reference used by exercise scientists worldwide.
Example
A 165 lb (75 kg) person runs at 6 mph (MET 9.8) for 30 minutes:
- Calories = 9.8 × 75 × 0.5 = 368 calories
Tips
- Heavier people burn more calories doing the same activity for the same duration — weight is a key variable.
- MET values represent gross calorie expenditure, including calories you would have burned at rest. Net burn (exercise-only) is slightly lower.
- Heart rate monitors and fitness trackers add personalization but still use MET-based formulas under the hood.
- For weight loss math: a 3,500 calorie deficit is roughly equivalent to one pound of fat.
Frequently Asked Questions
What activity burns the most calories?
High-intensity activities like running fast, jump rope, and HIIT have the highest MET values (10–14+). But total calories also depend on duration — a long moderate-intensity workout can easily out-burn a short intense one.
How accurate is this calculator?
MET-based estimates are typically within 10–20% of actual calorie burn. Individual factors like fitness level, body composition, terrain, and weather all affect the real figure. Use this as a useful estimate, not a precise measurement.
Does muscle burn more calories than fat?
At rest, yes — muscle tissue burns approximately 6 calories per pound per day compared to about 2 calories for fat. This is why body composition affects resting metabolism, though the difference is often overstated in popular fitness advice.
Should I eat back exercise calories?
It depends on your goal and how your baseline calorie intake was calculated. If your TDEE already includes your activity level, then no. If you set calories based on a sedentary baseline and exercise on top of it, eating back a portion of those calories is appropriate.