This is why fitday is so confusing....
I use fitday for a food journal, although I'm not as religious about it as I should be, and out of curiosity I plugged in the stats of 289 lbs and 5 ft tall. I was given a basal rate of 2059, and a "lifestyle" rate with sedentary listed added another 412. The lifestyle calories that fitday adds are what are notoriously inaccurate, and there have been numerous threads here about that. Using those stats, if you change the lifestyle to "housework", it allows for another 1750 calories! I'm sorry, but that's ridiculous-no amount of vaccuuming and washing dishes is going to burn that off, or there would be no need for any of us to go to the gym

When I use my own stats, I am given a basal rate of 1491, with lifestyle adding another 1280-which brings my total allotment to almost 2800 calories per day. Believe me-I WISH I could eat like that. I can only tell you that from my own experience, if I eat more than 1500 per day consistently I gain weight-and if I took fitday for what it said I would gain about 6 pounds a month or more.
Basal metabolic rate is just what it means-it's the base rate, with no exercise, of calories we burn just by living. Highly active people can add more and not gain, because consistent exercise raises our metabolism even when we are at rest. People with damaged metabolisms due to past yo-yo dieting or a health issue such as an underactive thyroid, etc will burn less-there is no magic number. All we can do is guess and try.
My husband is 6'2", and 215 pounds. A nutritionist told him that he has to consume between 2500-2700 calories a day to maintain his weight-he's very active at work 12 hours a day and is pretty active in general. Men burn more than women. Taller burns more than shorter-so I think 3000 is WAY on the high end for anyone who isn't a 6 ft tall olympic in training. I'm no expert by any means, and I agree with double checking those numbers-but please don't rely solely on what fitday says-it has set many of us "fat chicks" up for failure.