How many calories does walking, running, cycling, or the stairmaster actually burn? Pick the activity, put in your weight and time — calculated with standard MET values used in exercise science. Free, nothing stored.
Every activity has a MET value (metabolic equivalent) from exercise-science research — how many times your resting burn it costs. Calories = MET × your weight in kg × hours. A 85kg person jogging for 45 minutes: 8.3 × 85 × 0.75 ≈ 530 kcal.
These are decent estimates, not gospel — machines and fitness watches routinely over-read by 20–30%. And you can't outrun a bad diet: a 45-minute run is one burger. That's why the winning move is knowing what's going in — which is the bit Fuel Log does from a photo.