What Is the Average Weight for My Age?
The calculator above turns your birth date into a single number: the average weight for someone your exact age, based on national health survey data. Curious how you compare? That's the point of this page — not a verdict, just a data point.
Here's the headline most people are really searching for: the average American man weighs roughly 199 lbs (about 90 kg), and the average American woman weighs roughly 171 lbs (about 77.5 kg). Averaged across both, the numbers below trace how that figure shifts from early childhood through old age.
One thing to say plainly up front: average is not the same as healthy or recommended. These numbers describe what people actually weigh in national surveys — they aren't targets, goals, or medical guidance. Height, muscle, genetics, and health history all shape an individual's weight in ways a single average can't capture.
What the surveys measure — and what they don't
Average weight climbs steadily through childhood and the teen years — from about 27 lbs (12.3 kg) at age 2 to roughly 110 lbs (50 kg) by age 14, tracking CDC growth-chart medians as kids grow taller and add bone and muscle alongside fat. By 18, the average sits around 146 lbs (66 kg), still rising as bodies finish maturing.
Adult weight, averaged across men and women, climbs through the 20s and 30s and then plateaus — the survey averages hold near 186 lbs (84.5 kg) across the 40s and 50s — before easing back down through the senior years, to roughly 180 lbs (81.5 kg) at 70 and 169 lbs (76.5 kg) by 80. That later decline shows up consistently in the survey data, and it's explained in the FAQ below.
How the calculator works
For ages 2 through 19, the calculator uses CDC growth-chart medians — the 50th-percentile weight recorded across large pediatric measurement surveys. For adults, it switches to NHANES (National Health and Nutrition Examination Survey) mean body weight, the CDC's ongoing physical-measurement survey of the US population. Both sources publish data in age bands, so the calculator interpolates between the nearest published points to estimate a figure for your exact age.
The number shown blends male and female averages into one population figure, since actual adult averages differ by roughly 13 kg (about 29 lbs) between the sexes. That makes this a broad reference point, not a personalized estimate — it says nothing about your height, build, or health, and isn't adjusted for those factors. Think of it as what the average person your age weighed in recent national surveys, nothing more.
Average weight by age (across genders)
| Age | Average weight | In kg |
|---|---|---|
| 2 | 27 lbs | 12.3 |
| 6 | 46 lbs | 20.8 |
| 10 | 72 lbs | 32.5 |
| 14 | 110 lbs | 50.0 |
| 18 | 146 lbs | 66.0 |
| 30 | 182 lbs | 82.5 |
| 50 | 186 lbs | 84.5 |
| 70 | 180 lbs | 81.5 |
| 80 | 169 lbs | 76.5 |
CDC growth-chart medians for children, NHANES survey means for US adults, interpolated. Survey averages, not health targets.
Frequently asked questions
What's the average weight for a US adult man and woman?
Per recent NHANES survey data, the average American man weighs roughly 199 lbs (about 90 kg), and the average American woman weighs roughly 171 lbs (about 77.5 kg). Both figures are national survey means, not targets — they describe what adults actually weigh, not what any guideline recommends.
What's the average weight for a 14-year-old?
Based on CDC growth-chart data, the average 14-year-old weighs about 110 lbs (50 kg), combining typical boys' and girls' figures. The normal range at this age is wide — puberty timing varies a lot, so plenty of healthy 14-year-olds weigh well above or below this number.
Is average weight the same as healthy weight?
No. Average weight is a survey statistic — what people actually weigh. Healthy weight is a separate, clinical question usually framed around BMI ranges and individual health factors, and it's genuinely debated among researchers. This page reports population data only; it doesn't offer health guidance or a target weight.
How has average weight changed over the decades?
It's risen substantially. NHANES data going back to the early 1960s show American adults are roughly 25 to 30 lbs heavier on average today than adults were then, for both men and women. The exact figure depends on which survey years you compare, but the upward trend is well established.
Why does average weight dip after midlife?
In this data, the average peaks around 186 lbs (84.5 kg) near age 50, then eases down to about 169 lbs (76.5 kg) by 80. Age-related muscle loss, height loss, and survivorship (heavier people are somewhat less likely to reach very old age) all contribute to that later decline.
How do US averages compare to other countries?
Among wealthy nations, the United States tends to report some of the higher average adult body weights in international comparisons. Exact rankings shift depending on the survey and year involved, so it's fair to say the US skews high, but treat any specific country-to-country comparison as rough rather than precise.
Should I compare my own weight to these averages?
You can, out of curiosity, but treat it as one reference point, not a judgment. Height, sex, muscle mass, genetics, and health conditions affect individual weight far more than age alone does. The number the calculator gives you above is a population average — not a goal, and not a diagnosis.
Sources
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