BMI for ages 30 to 34
A BMI for the 30 to 34 age group takes only height and weight. The sample below uses 5 ft 1 in and 156 lb.
How it works
Multiply your height in meters by itself. Divide your weight in kilograms by the result. That is your BMI. Pounds and inches work too, because the page converts them. Here 156 lb is 70.8 kg and the height is 154.9 cm, which is 1.5494 meters.
Worked example
Say a person is 5 ft 1 in and 156 lb. In metric that is 1.5494 m and 70.8 kg. Then 70.8 ÷ (1.5494 × 1.5494) = 70.8 ÷ 2.401 = 29.5, which is overweight.
Common questions
Is BMI accurate for muscular people?
It can read high for someone with a lot of muscle, because muscle weighs more than the same volume of fat. A body fat measurement gives a better picture in that case. At 156 lb, the BMI of 29.5 says nothing about how much of that weight is muscle.
Does the adult BMI formula work for children and teens?
No. Children and teens are compared with others of the same age and sex. They need a percentile-based calculator instead of the adult bands. This page uses age 32 as its example, and the adult bands apply from age 20.
Does age or sex change the adult BMI result?
The number itself does not change. The formula uses only height and weight. Some health bodies suggest different cut points for some groups. Ask your doctor what suits you. At age 32 the result for 5 ft 1 in and 156 lb is 29.5, the same as at any other adult age.
How is the 98 to 132 lb range worked out?
It is the weight that gives a BMI of 18.5 and the weight that gives 24.9 at 5 ft 1 in. The calculator reverses the formula for you. At 5 ft 1 in that range is 34 lb wide.
What BMI range counts as a healthy weight for adults?
Under 18.5 is underweight. 18.5 to 24.9 is a healthy weight. 25 to 29.9 is overweight. 30 or more is obesity. At 5 ft 1 in, a BMI of 18.5 to 24.9 works out to 98 to 132 lb.