text: is 18 pounds to much weight to lose in 2 months? thats my goal i hope i can achieve in 8 weeks.i just wanted to kow if that was too much or not realistic. unless your bmi is greater than 33, you should strive for no more than 2 pounds per week for permanent weight loss.  if your bmi is greater than 33, you may be able to lose more but should seek the guidance of a certified personal trainer or exercise specialist.    best thing to do is just calculate your bmr (basal metabolic rate) & amr (active metabolic rate) to give you a rough idea of your daily calorie expediture.  you can then adjust your diet and physical activity levels accordingly.  bmi http://www.preventdisease.com/healthtools/articles/bmi.html  bmr http://www.preventdisease.com/healthtools/articles/bmr.html