The average American adult is heavier than most people realize, and the numbers are worth saying plainly. According to the CDC, the average adult man in the United States weighs about 199.8 pounds and stands 5 feet 9 inches, while the average woman weighs about 170.8 pounds at 5 feet 4 inches. Put those into a BMI and the average adult lands in the overweight range, around 29.
Set that against the tidy ideal-weight charts that have floated around doctors' offices for decades and the distance is striking. But before anyone panics or preens, both the average and the ideal deserve a closer, more honest look, because each is a blunter tool than it appears.
How much does the average American weigh?
The CDC's measured data, not self-reported, puts the average man near 200 pounds and the average woman near 171. Americans have gained weight steadily over the past two decades while barely getting taller, which is why average BMI has drifted up into the overweight band.
The chart shows the trend. The gain is real and consistent, and it is happening on essentially unchanged average heights.
CDC, National Health and Nutrition Examination Survey (measured).
- Men 1999: 189 lb
- Men now: 200 lb
- Women 1999: 164 lb
- Women now: 171 lb
What does 'ideal weight' actually mean?
Ideal-weight formulas like Devine give a target based on height and sex, and the average American now sits well above what those charts suggest. But the formulas were built for rough clinical purposes, not as personal goals, and they ignore frame size, muscle, and age. The ideal weight calculator will give you a number, and it is a reasonable reference point, but it is a starting line, not a finish line.
The same caution applies to the average. A population average is not a recommendation, and a BMI near 29 does not describe any one person's health. Muscle mass, waist size, fitness, and metabolic markers all matter more than a single ratio of weight to height, which the BMI calculator can only ever approximate.
How to think about your own weight honestly
A few principles keep the numbers useful instead of anxiety-inducing:
- Treat both the average and any ideal-weight figure as reference points, not verdicts.
- Watch your own trend over months rather than fixating on a single reading.
- Add context: waist circumference and fitness tell you things weight alone cannot.
- Anchor changes to your maintenance calories, which you can estimate with the calorie needs calculator, rather than a target number on a chart.
The bottom line
The average American man weighs about 200 pounds and the average woman about 171, putting the typical adult in the overweight BMI range and far above old ideal-weight charts. Both figures are useful and both are blunt: an average is not a goal, and an ideal-weight formula is not a diagnosis. Use them as reference points, add context like waist size and fitness, and judge your own health by the trend and the whole picture, not one number.