I agree. The number of calories your body burns doing a certain activity is
highly subjective, and therefore I don't rely on any sort of "calories burned" estimation---online calculators or the numbers that the equipment says I've burned (you know how sometimes treadmills/ellipticals/etc will say how many calories you are meant to have burned during a workout? I've heard that these tend to drastically
overestimate calories burned?).
I just figure out (by trial and error) what is a good intensity and length of workouts for me to lose weight. Then I keep that up for a while. Eventually, my body gets used to doing what I'm asking it to do, and I start to see that I'm not losing as much, so I up my workout a little or I tweak my diet. Obviously, some online calculators could probably give you a decent
estimate, but since the only way to really tell how many calories you've burned is to factor in
your specific body, I would not rely on those numbers as a rule.
The good news is, no matter the number of calories you've burned, you're definitely doing yourself some good. Even if you don't see benefits of movement in your weight loss goals (you probably will), you're doing your heart a huge favor by getting the blood flowing!
I realize my ticker makes it look like I have no idea what I'm talking about.
My info is based on my past experiences with weight loss, and also on what my dietitian recommended to me a while ago. Good luck to you!