Calories burned is a joke!
I tracked my food intake with Cronometer on February 13th. The cold weather gave me a gargantuan appetite, and I consumed 3090.6 calories. Because of the wind chills and slippery sidewalks, I didn't spend much time outside and thus didn't get much exercise.
According to Cronometer, this would be my daily calorie burn if I were 367 pounds and sedentary. In reality, that's 230 pounds heavier than my normal weight. My daily calorie burn (with a sedentary lifestyle) was only 1836 calories, which is more like my summer intake.
Dividing 1836 calories by 137 pounds yields about 13.4 calories per pound. So assuming that each pound of body weight requires 13.4 calories, my 3090.6 calories that day equates to "only" 231 pounds. 231 pounds is still enormous, but that's within 100 pounds of my actual weight.
Assuming my lifestyle was lightly active instead of sedentary, I burned 2104 calories on that day, and I would have had to weigh 295 pounds to burn 3090.6 calories. Dividing 2104 calories by 137 pounds equates to about 15.36 calories per pound. Assuming that each pound of body weight requires 15.36 calories, my 3090.6 calories equates to "only" 201 pounds. 201 pounds is still massive, but at least that's only 64 pounds heavier than my actual weight.
So what goes into Cronometer's calorie burning calculations?