yikes people calm down.
Yeah, I think that calculator is pretty inaccurate. According to it I am 25.7 which is in the "overweight" range, and anyone who has seen me knows I am far from overweight. 6'2" and 200 lbs seems like a pretty ideal weight combination to me. Last year I was 180 and people said I looked too skinny, so I don't think an extra 20 lbs is going to magically catapult me into the overweight range, especially because I don't look visibly all that bigger. A better indicator of your muscle health is to check your body fat percentage, which can be obtained a couple of ways: underwater weighing, and that little fat clamp thingy that goes on the tricep. Obviously the underwater weighing is more accurate, but the fat clamp can give you at least a ballpark reading. A fit range for males is 7-13%, a normal range is 14-23%, and once you get over 23% you're getting into the unhealthy range. Females have a naturally higher body fat % than males because of how their bodies are designed, so their ranges look more like 12-18% for fit, 19-30% for normal, and 31%+ for unhealthy. These percentages might be a little off as I haven't looked at the chart in a really long time, but that's generally how it looks. Can someone less lazy than me look up the actual chart and correct any errors I made?
Regardless of all this, you should always do what makes you happy. If you don't want to exercise, don't. If you want that second piece of cheesecake because it's friggin delicious, go for it. If you want to stay healthy and fit, fine, but do it because YOU want to, not because someone else said you should. Nobody should be making themselves unhappy just because some magazine or tv commercial said we have to be a certain size.
Bottom line: Love who you are. Fat, skinny, tall, short, whatever. Don't let others judge you, and don't be one to judge. Your life will be outstanding if you can learn to do this.