Weight Percentile Calculator
HealthSee how your body weight compares to the general adult population by sex. Get an instant weight percentile rank using global adult weight reference averages.
Weight Percentile
36.9
z-score
-0.33
Reference Average Weight
80
What is a Weight Percentile?
The Weight Percentile Calculator shows how a given body weight compares to the general adult population by sex, using global average weight reference data. Enter your weight and sex, and the calculator returns a percentile rank showing what portion of the reference population you outweigh.
This pairs with the Height Percentile Calculator for a fuller comparison against population averages, and the BMI Calculator for a combined height-and-weight health metric.
How to use this Weight Percentile calculator
- Select your sex โ Male or Female.
- Enter your weight in kilograms.
- Read the Weight Percentile result instantly.
- Check the Reference Average Weight shown to see the baseline used for comparison.
- Try different weight values to see how the percentile shifts across the range.
Formula & Methodology
The calculator uses a global adult average weight reference by sex: z-score = (Weight โ Reference average) รท Reference standard deviation Percentile = ฮฆ(z-score) ร 100, where ฮฆ is the cumulative standard normal distribution. Worked example โ a man weighing 95 kg: Reference average (men) = 80 kg, SD = 15 kg z-score = (95 โ 80) รท 15 = 1.00 Percentile โ ฮฆ(1.00) ร 100 = 84th percentile This means a weight of 95 kg is heavier than approximately 84% of the reference adult male population.
Frequently Asked Questions
Weight percentile shows what percentage of the population of the same sex weighs less than a given weight. A percentile of 60 means the weight is higher than roughly 60% of that reference population.
The calculator compares the entered weight to a global adult average weight reference for the selected sex, computes a z-score based on the reference standard deviation, and converts that z-score into a percentile using the normal distribution.
This calculator uses approximate global adult averages of 80 kg for men and 68 kg for women; actual national averages vary by country, so results here reflect a general global reference rather than a country-specific comparison.
No โ weight percentile only compares your weight to population averages, while healthy weight assessment typically also considers height, via tools like the [BMI Calculator](/bmi-calculator/) or the [Ideal Weight Calculator](/ideal-weight-calculator/), since weight alone doesn't account for body frame or height.
Average body weight differs across populations due to a combination of average height, diet, lifestyle, healthcare access, and genetics that vary meaningfully by country and region.
A negative z-score means the entered weight is below the reference average โ for example, a z-score of -1 means the weight is one standard deviation lighter than the reference population average.
No โ this calculator only compares total body weight to a population average and doesn't distinguish between muscle, fat, or other body composition factors; tools like the [Body Fat Calculator](/body-fat-calculator/) address composition specifically.
No โ this uses adult population reference data; for children and teens, weight should be compared against age- and sex-specific pediatric growth charts, since expected weight changes constantly with age during childhood.
This calculator ranks body weight against the adult population, while the [Height Percentile Calculator](/height-percentile-calculator/) does the same comparison for height โ both use the same normal distribution approach with different reference data.
This calculator currently uses a single global reference average by sex rather than country-specific data, so results should be treated as a general worldwide comparison rather than a precise national ranking.
Also known as