If What if your 16 and Weigh 135 lbs How much Will i Weigh By Age 18?

It all depends,

some people grow faster, but dont worry , JUST remember MUSCLE WEIGHS MORE THAN FAT, and dont look a "weight" (well just weight) look for the body shape you like and like if you think of weight theres a difference. for example

me and my friend are the same age basiclly im taller than her by 3 inches we wear the same jean size shirt size bra size EVERYTHING the same but i weigh 10 more pounds cause i do swimming and gymnastics, so i have alot of muscle.

so dont worry about weight worry about "size" you like.

OH AND HEALTH!!!!