Depends, there are several answer since you did not give the correct information for a single array of numbers. Thus I have to give out several answers, each are correct/incorrect depending on the person we are talking about. Height and age alone does not give us enough variables to calculate the right weight for anyone. Being female at 5' 6" if you are of slender build (meaning your skelaton is composed of thin bones, small hands, small feet, then 120-133 pounds is within average nominal parameters. If you are of medium build (again the skelaton plays a roll) then 130-144 pounds is within average nominal parameters. If you are large build (large thick heavy bones, big hands, big feet, wide pelvis, barrel chested, then 140-159 pounds is within average nominal parameters. If you work out or have an exercise program or are considered active you may have more muscle thus your right weight would be greater than those numbers. EXAMPLE: The Terminator (Arnold Sw....) Stands in at 6'2" tall weighed in at 260 pounds. For a man standing 6'2" (I'm that tall by the way) The obesity scale under a BMI calculator starts off at around 230 pounds, however Arnold was not at all fat or overweight or obese when he weighed in at 260 pounds. Granted this is an exceptional case, but it serves a point the "right weight" for a person has a lot to do with body fat percentage not how much mass one possesses. Even if you are "fat" being "over weight" does not mean that all of that weight is fat. If anything fat people have more muscle because they lug around more mass (weight). Any diet that aims to lose fat also results in the loss of muscle mass. Do you see what I am saying in that? Then there is the simple fact of body type: http://www.bodybuilding.com/fun/becker3.htm http://quiz.ivillage.com/diet/tests/bodytype.htm Body type also includes those people who no matter how much they eat they can not gain weight, while another person can eat a little and it all goes to fat. Body type for the lean person will make their personal "right weight" lower than for the person who automatically gains weight when they look at food who will have a "right weight" that is higher than the other. Normal is not a good word to use - for everybody "normal" for them is not the same as anyone else. Further "average" takes a large section of the population, weights X quality and divides the sum by the number of people measured to arrive at the solution or the "average" Y answer. This means that people range from one extreme to another - the average is somewhere in the middle, but that does not mean it applies to all people. Just those who happen to fall smack dab in the middle. YOUR right weight depends on all of those factors above. Frankly only a trained professional can measure you for the correct and one and only true test that would give you a number that a set of scales could measure by. That would be body fat percentage. A "simple" rough (very rough when we consider body types) is the calculator found here: http://www.he.net/~zone/prothd2.html Again it is a rough and not always accurate. You would need to visit a doctor or a gym and be measured - the most accurate way is the displacement measurement where you enter into a bath of a known x amount of water at Y height - the water will raise Z amount as our displace it, taking into account your build, your height and your weight they can then calculate how much of that weight is muscle, how much is fat. I bet your sorry I answered your question - LOL :-)