Discover the real average penis size, compare penis size by country, and find out "is my penis big?" with our scientific calculator based on 15,521 medically measured men.
The average penis size has been definitively established through multiple scientific studies. According to the most comprehensive meta-analysis published in BJU International, which analyzed data from 15,521 men across 17 studies:
These measurements represent the true average penis size based on medical measurements, not self-reported data. It's important to note that what is normal penis size includes a wide range - 95% of men fall between 3.9 and 6.5 inches erect.
This penis size chart shows where different measurements fall on the percentile scale. Use this chart to understand where you compare to the average penis size.
| Erect Length | Percentile | Category | % of Men |
|---|---|---|---|
| < 4.0 inches | 2nd | Below Average | 2% |
| 4.0 - 4.5 inches | 10th | Below Average | 8% |
| 4.5 - 5.0 inches | 25th | Average | 15% |
| 5.0 - 5.5 inches | 50th | Average | 30% |
| 5.5 - 6.0 inches | 75th | Average | 25% |
| 6.0 - 6.5 inches | 90th | Above Average | 12% |
| > 6.5 inches | 98th | Above Average | 2% |
This penis size chart is based on the largest global penis study to date, providing accurate percentiles for comparison.
Use our scientific penis calculator to answer "is my penis big?" Get your exact percentile ranking based on medical data.
Use Penis Calculator →Instant results • Completely private • Based on real medical data
Penis size by country data is often misrepresented. Here's what legitimate studies show about average penis size around the world:
Penis size by country rankings are based on flawed studies with small sample sizes, self-reporting bias, and inconsistent measurement methods. The global penis study consensus shows minimal actual variation between populations when properly measured.
Learning how to measure penis correctly is crucial for accurate results. Most men measure incorrectly, leading to inaccurate comparisons with average penis size.
Following this method ensures your measurements align with medical standards used to determine normal penis size ranges.
The difference between flaccid vs erect size varies dramatically between individuals. Understanding this variation is key to interpreting average penis size data.
Penis girth is often more important than length for sexual satisfaction, yet it's frequently overlooked when discussing average penis size.
| Penis Girth (Circumference) | Percentile | Category |
|---|---|---|
| < 4.0 inches | 10th | Below Average |
| 4.0 - 4.5 inches | 25th | Average |
| 4.5 - 5.0 inches | 50th | Average |
| 5.0 - 5.5 inches | 75th | Above Average |
| > 5.5 inches | 90th | Well Above Average |
Studies show that penis girth correlates more strongly with partner satisfaction than length, making it an important aspect of normal penis size considerations.
Understanding what is normal penis size helps reduce anxiety and provides realistic expectations. Medical professionals define normal as any size that doesn't impair function.
Normal penis size encompasses 95% of the male population:
Only sizes below 3 inches erect (micropenis) are considered medically abnormal and affect less than 0.6% of men.
The vast majority of men asking "is my penis big?" fall well within the normal penis size range, regardless of what pornography or internet myths suggest.
The most comprehensive global penis study analyzed data from multiple countries and ethnicities, establishing the true average penis size worldwide.
This global penis study debunked many myths about penis size by country and established that variation within populations far exceeds any differences between them.
To answer "is my penis big?", compare your measurements to the average penis size of 5.16 inches erect. If you're above 6 inches, you're in the top 25%. Above 6.5 inches puts you in the top 2%. Use our penis calculator for an exact percentile ranking.
Studies consistently show that penis girth is more important for partner satisfaction than length. The average penis girth is 4.59 inches. Most nerve endings are in the first third of the vaginal canal, making girth more relevant than deep penetration.
Most penis size by country data is highly unreliable due to small sample sizes, self-reporting bias, and inconsistent measurement methods. The global penis study shows that when properly measured, there's minimal difference between populations. Be skeptical of dramatic country rankings.
The penis size chart represents adult measurements (ages 18+). Penis growth typically completes by age 18-21. The average penis size remains relatively stable from age 20-60, with slight decreases possible after 60 due to reduced blood flow.
How to measure penis correctly: Get fully erect, place ruler on top pressing into pubic bone (bone-pressed), measure to tip. For girth, wrap tape around thickest part. This matches medical study methods used to determine average penis size.
Flaccid vs erect size varies dramatically. Average flaccid is 3.61 inches, average erect is 5.16 inches. Some men are "growers" (small flaccid, big erect), others are "showers" (large flaccid, modest increase). Flaccid size doesn't predict erect size.
Medical professionals define normal penis size as any size that doesn't impair function. This includes 95% of men (3.9-6.5 inches erect). Only micropenis (under 3 inches erect) is considered abnormal, affecting less than 0.6% of men.
Our penis calculator uses data from the largest global penis study of 15,521 medically measured men. It provides accurate percentile rankings based on scientific data, not internet myths or self-reported sizes. The calculator accounts for proper measurement technique (bone-pressed).
Stop wondering about average penis size. Use our scientific penis calculator to get your exact ranking based on real medical data from the global penis study.
Calculate Your Percentile →Based on 15,521 medical measurements • 100% private • Instant results