CalcPro

Calories Burned Calculator

Energy burned in an activity from its MET value, your weight and time.

Not medical advice. This tool is for general information and education only. It is not a diagnosis and cannot replace a doctor. Consult a qualified healthcare professional before acting on any result.

How it works

This calculator estimates the total energy (calories) your body burns during a chosen activity. It combines three key inputs: the activity's intensity (measured as MET), your body weight, and how long you exercise. The formula accounts for the fact that heavier individuals and higher-intensity activities demand more energy.

The calculator includes 10 common activities—from gentle yoga (2.5 MET) to intense jump rope (12.3 MET)—each with a standard MET value based on research data. You select your activity, enter your weight and duration, and the tool computes total burn. This is useful for understanding exercise contribution to daily energy balance, planning workout intensity, or tracking fitness progress.

The formula

Calories burned = (MET × weight in kg × duration in hours) × 1.0

If you enter weight in pounds, the calculator converts it to kilograms (divide by 2.205). Duration is converted from minutes to hours by dividing by 60.

Worked example

Suppose you weigh 75 kg and go for a 45-minute moderate cycling session (MET = 5.8).

Step 1: Convert duration to hours.
45 minutes ÷ 60 = 0.75 hours

Step 2: Look up the MET value for moderate cycling.
MET = 5.8

Step 3: Multiply MET × weight × hours.
5.8 × 75 × 0.75 = 326.25 calories

Result: You burn approximately 326 calories in that 45-minute ride.

Now try the same person doing a 30-minute run at 9.7 km/h (MET = 9.8):

30 minutes ÷ 60 = 0.5 hours
9.8 × 75 × 0.5 = 367.5 calories

Running for half the time burns more because the higher intensity (9.8 MET vs. 5.8 MET) more than compensates for the shorter duration.

Common mistakes

Forgetting to account for resting burn: This calculator shows activity calories only, not your baseline metabolism. Your body burns calories even at rest; add your basal metabolic rate (BMR) if you want total daily burn.

Assuming the same MET for different speeds: Walking at 4 km/h burns far fewer calories than hiking uphill. The calculator's activity list uses standard, moderate-intensity versions. If you go faster or harder, burn will be higher; if you go easier, it will be lower.

Overestimating duration: Be honest about actual exercise time. Resting between sets, walking to the gym, or chatting counts differently than continuous effort.

Ignoring individual variation: Younger, fitter, or more muscular people may burn 10–20% more or less than the formula predicts. Use this as a starting point, not a guarantee.

Important: This is an estimate based on population averages, not professional medical or nutritional advice. Individual calorie burn varies by age, fitness, metabolism, and genetics. For weight management or health planning, consult a doctor, dietitian, or certified trainer.

Frequently asked questions

What is MET and why does it matter?

MET (Metabolic Equivalent of Task) measures how hard your body works during an activity relative to resting. A MET value of 1 equals your resting metabolic rate. Walking at 4 km/h ≈ 3.5 MET; running at 9.7 km/h ≈ 9.8 MET. Higher MET = more calories burned per minute.

Why does weight affect calorie burn?

Heavier bodies require more energy to move. A 100 kg person burns significantly more calories during the same 30-minute walk than a 60 kg person, because their muscles and organs work harder to move greater mass.

Does intensity matter within an activity?

Yes. This calculator uses standard MET values for typical intensity (e.g., 'moderate' cycling). If you work much harder or easier, actual burn will differ. Competitive cycling burns more; leisurely cycling burns less.

Is this estimate accurate for me?

This formula is a population average. Individual burn varies by age, fitness level, muscle mass, and metabolism. Use it as a ballpark guide, not a precise measurement. Fitness trackers and lab tests are more personalized.

Can I use this for weight loss planning?

You can use it to estimate activity contribution to a calorie deficit, but weight loss depends on overall diet and activity. Consult a healthcare provider or registered dietitian for a personalized plan.

What if my activity isn't listed?

The calculator includes the most common exercises. For unlisted activities, find the MET value online (reputable fitness or medical databases) and select the closest match, or use a general 'moderate activity' MET of around 4–5.

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