Learn more about how to calculate how much you should weigh and explore weight charts, with healthy weight ranges in relation to your height and age.

At each physical exam, height and weight should be measured, tracking progress on an individualized chart. This general health screen is recommended every two years for teenagers, aged 11 to 24 years.

Average Baby Weight at 2 Months Generally, babies this age will continue to gain about 1.5 to 2 pounds each month. This usually puts them at about 2 to 4 pounds over birth weight at 2 months old.

By age 4, the correlation is about 0.8 for boys and 0.66 for girls. That is, for boys you can explain about 64 percent of the variation in adult height by knowing height at age 4.