ENERGY EXPENDITURE

Calories Burned Exercise

Calculate exactly how much energy you expend during exercise based on clinical MET formulas.

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Total Calories Burned

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Active Energy Expenditure

Per Minute

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Calories

Fat Equiv.

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Pounds Lost

The Brutal Truth About Burning Calories

The fitness industry relies on the lie that you can out-train a bad diet. You can't. If you run heavily for 45 minutes, you might burn 500 calories. You can eat those 500 calories back in exactly three minutes by eating two slices of pizza. Exercise is for building a resilient cardiovascular system and forging muscle tissue. It is a terrible primary tool for weight loss.

The Golden Rule: Use this calculator to determine your active expenditure, but do not eat those calories back if your goal is fat loss. The deficit must come from the kitchen. The gym is for performance.

How This Math Actually Works

We use the established clinical formula for energy expenditure:
Calories = MET × Weight (in kg) × Duration (in hours).

Because larger bodies require more energy to move through space, a 200lb person will inherently burn more calories running a mile than a 150lb person running the exact same pace. If you lose weight over time, your active calorie burn will decrease. You become more metabolically efficient.

Frequently Asked Questions

Does lifting weights burn a lot of calories?▼
During the actual session? No. Resistance training burns significantly fewer calories per minute than steady-state cardio. However, lifting weights builds muscle tissue. Muscle is metabolically active, meaning it burns calories passively 24 hours a day. Over a 12-month period, lifting weights yields a vastly superior metabolic return on investment.
What is the Afterburn Effect (EPOC)?▼
Excess Post-exercise Oxygen Consumption (EPOC) is the energy your body uses to recover from intense activity like HIIT or heavy lifting. While real, it is massively overstated by fitness marketers. It generally only adds a 5% to 10% bonus to your total calories burned.
Why do Apple Watches and Fitbits give different numbers?▼
Wearables estimate calorie burn using heart rate algorithms, which are notoriously inaccurate. Your heart rate can spike from caffeine, stress, or heat, causing the watch to record a massive calorie burn while you are completely sedentary. Clinical MET formulas based on strict duration and weight are far more reliable.