What the tool does, how to run it, and what to expect from the result.
Every activity has a MET value: how many times your resting energy use it takes. Calories burned = MET × 3.5 × body weight in kg ÷ 200 × minutes. Walking at 3 mph is 3.5 METs, so a 70 kg person burns 3.5 × 3.5 × 70 ÷ 200 × 30 ≈ 129 kcal in half an hour. MET values come from the Compendium of Physical Activities.
A quick way to understand who this helps, what it solves, and where it connects next.
Anyone tracking fitness or health numbers, plus students and clinicians double-checking a formula.
Using the calories burned calculator without installing anything or signing up.
Short answers for the questions people usually have before trying a utility like this.
Within about 10-20% for most people. MET values are averages; fitness, terrain and efficiency move the real number. Fitness trackers use similar formulas plus heart rate.
Moving more mass takes more energy, so the formula scales with body weight. The same 30-minute walk burns about 129 kcal at 70 kg and about 165 kcal at 90 kg.
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Enter your numbers and the result updates live in your browser. Nothing is uploaded and no server is used.
Calculations run locally in your browser. An estimate for general guidance, not medical advice.