How often should I re-calculate my BMR?

Appersmere

I've been on this site for 2 months now and have lost almost 20 pounds. How often, if at all, should I re-calculate my BMR?

Huffdogg

I'd go ahead and do it now if I were you. If you wanted to do a quick self-eval for total calories, multiply your body weight by a number between 10-12 (higher if you have a higher metabolism, lower if you gain flab more easily), and that's your basic BMR before lifestyle caloric burn.