Penis Size Calculator & Percentile Tool
The free penis size calculator that shows your exact percentile rank on a bell curve. See how your dick size compares to men worldwide — anonymous, instant, and completely private.
Calculator Inputs
Your identity is never stored. Only anonymous measurements power the community stats — no names, IPs, or personal data ever.
Your Result
Frequently Asked Questions
How is the percentile calculated?
Your measurement is converted to a z-score using a population mean and standard deviation, then mapped onto a normal distribution (the bell curve) to produce a percentile rank.
Why does bone-pressed vs non-bone-pressed matter?
Bone-pressed is the standard used in most clinical research, making comparisons more accurate. Non-bone-pressed results can be 0.5–1 cm shorter depending on body composition.
Is girth included in the score?
In erect mode with a girth value entered, the calculator blends length (65%) and girth (35%) into a combined percentile. In flaccid mode or with no girth entered, only length is used.
Is any data stored or sent anywhere?
Your personal identity is never stored. When you hit Calculate, only three anonymous data points are recorded to power the community stats: your length in inches, your percentile, and today's date. No name, no IP address, no device ID — nothing that could ever identify you.
What population data is this based on?
The calculator uses mean and standard deviation figures drawn from published academic studies on erect and flaccid length and girth, modeled on a normal distribution.
What is the Average Penis Size?
Based on data from multiple large-scale academic studies, the average erect penis length worldwide is approximately 5.16 inches (13.12 cm) with an average girth of 4.59 inches (11.66 cm). These figures are measured bone-pressed, the standardized method used in clinical research.
The majority of men — roughly 68% — fall within one standard deviation of the mean, meaning erect lengths between approximately 4.5 and 5.8 inches. Only about 2.5% of men measure above 6.5 inches, and an equal proportion measure below 3.9 inches.
Flaccid length is a poor predictor of erect length. Studies suggest flaccid length accounts for only about 30% of the variation in erect length — so-called "growers" can gain significantly more length than "showers."
Average Penis Size by Country
Average erect length in inches by country, based on published research. How do you compare to your country's average?
Data sourced from published academic studies. Country figures represent reported averages and may vary across methodologies.
How to Measure Penis Size Correctly
Accurate measurement is essential for a meaningful percentile result. Here is the standardized method used in clinical research:
Penis Size Percentile by Measurement — What Percentile Am I?
Use the calculator above for your exact result including girth. The table below shows quick reference percentiles for common erect bone-pressed lengths.
| Length (in) | Length (cm) | Percentile | Tier |
|---|---|---|---|
| 3.0" | 7.6 cm | 1st | 🤏 The Micro Legend |
| 3.5" | 8.9 cm | 1st | 🤏 The Micro Legend |
| 4.0" | 10.2 cm | 4th | 🤏 The Micro Legend |
| 4.5" | 11.4 cm | 15th | 🎭 The Personality Guy |
| 5.0" | 12.7 cm | 40th | 👌 The Average Joe |
| 5.5" | 14.0 cm | 70th | 😎 The Cool Guy |
| 6.0" | 15.2 cm | 90th | 🚀 The Rocket |
| 6.5" | 16.5 cm | 98th | 👑 The King |
| 7.0" | 17.8 cm | 99th | 🐉 The Mythical Dragon |
| 7.5" | 19.1 cm | 99th | 🐉 The Mythical Dragon |
| 8.0" | 20.3 cm | 99th | 🐉 The Mythical Dragon |
| 8.5" | 21.6 cm | 99th | 🐉 The Mythical Dragon |
| 9.0" | 22.9 cm | 99th | 🐉 The Mythical Dragon |
All measurements bone-pressed erect. Percentiles based on normal distribution model using published research data. Use the calculator above for a personalised result including girth.
What Percentile is My Size? (Inches)
What percentile is 4.0 inches erect bone pressed?
4.0 inches (10.2 cm) erect bone-pressed ranks at approximately the 4th percentile worldwide — that puts you in the 🤏 The Micro Legend tier. Use the calculator above to get your exact result with girth included.
What percentile is 4.5 inches erect bone pressed?
4.5 inches (11.4 cm) erect bone-pressed ranks at approximately the 15th percentile worldwide — that puts you in the 🎭 The Personality Guy tier. Use the calculator above to get your exact result with girth included.
What percentile is 5.0 inches erect bone pressed?
5.0 inches (12.7 cm) erect bone-pressed ranks at approximately the 40th percentile worldwide — that puts you in the 👌 The Average Joe tier. Use the calculator above to get your exact result with girth included.
What percentile is 5.5 inches erect bone pressed?
5.5 inches (14.0 cm) erect bone-pressed ranks at approximately the 70th percentile worldwide — that puts you in the 😎 The Cool Guy tier. Use the calculator above to get your exact result with girth included.
What percentile is 6.0 inches erect bone pressed?
6.0 inches (15.2 cm) erect bone-pressed ranks at approximately the 90th percentile worldwide — that puts you in the 🚀 The Rocket tier. Use the calculator above to get your exact result with girth included.
What percentile is 6.5 inches erect bone pressed?
6.5 inches (16.5 cm) erect bone-pressed ranks at approximately the 98th percentile worldwide — that puts you in the 👑 The King tier. Use the calculator above to get your exact result with girth included.
What percentile is 7.0 inches erect bone pressed?
7.0 inches (17.8 cm) erect bone-pressed ranks at approximately the 99th percentile worldwide — that puts you in the 🐉 The Mythical Dragon tier. Use the calculator above to get your exact result with girth included.
What percentile is 7.5 inches erect bone pressed?
7.5 inches (19.1 cm) erect bone-pressed ranks at approximately the 99th percentile worldwide — that puts you in the 🐉 The Mythical Dragon tier. Use the calculator above to get your exact result with girth included.
What percentile is 8.0 inches erect bone pressed?
8.0 inches (20.3 cm) erect bone-pressed ranks at approximately the 99th percentile worldwide — that puts you in the 🐉 The Mythical Dragon tier. Use the calculator above to get your exact result with girth included.
What percentile is 8.5 inches erect bone pressed?
8.5 inches (21.6 cm) erect bone-pressed ranks at approximately the 99th percentile worldwide — that puts you in the 🐉 The Mythical Dragon tier. Use the calculator above to get your exact result with girth included.
What percentile is 9.0 inches erect bone pressed?
9.0 inches (22.9 cm) erect bone-pressed ranks at approximately the 99th percentile worldwide — that puts you in the 🐉 The Mythical Dragon tier. Use the calculator above to get your exact result with girth included.
What Percentile is My Size? (Centimeters)
What percentile is 9 cm erect?
9 cm (3.5 inches) erect bone-pressed ranks at approximately the 1st percentile worldwide — that puts you in the 🤏 The Micro Legend tier. Use the calculator above to get your exact result with girth included.
What percentile is 10 cm erect?
10 cm (3.9 inches) erect bone-pressed ranks at approximately the 3rd percentile worldwide — that puts you in the 🤏 The Micro Legend tier. Use the calculator above to get your exact result with girth included.
What percentile is 11 cm erect?
11 cm (4.3 inches) erect bone-pressed ranks at approximately the 10th percentile worldwide — that puts you in the 🎭 The Personality Guy tier. Use the calculator above to get your exact result with girth included.
What percentile is 12 cm erect?
12 cm (4.7 inches) erect bone-pressed ranks at approximately the 25th percentile worldwide — that puts you in the 🌱 The Grower tier. Use the calculator above to get your exact result with girth included.
What percentile is 13 cm erect?
13 cm (5.1 inches) erect bone-pressed ranks at approximately the 47th percentile worldwide — that puts you in the 👌 The Average Joe tier. Use the calculator above to get your exact result with girth included.
What percentile is 14 cm erect?
14 cm (5.5 inches) erect bone-pressed ranks at approximately the 70th percentile worldwide — that puts you in the 😎 The Cool Guy tier. Use the calculator above to get your exact result with girth included.
What percentile is 15 cm erect?
15 cm (5.9 inches) erect bone-pressed ranks at approximately the 87th percentile worldwide — that puts you in the 💪 The Overachiever tier. Use the calculator above to get your exact result with girth included.
What percentile is 16 cm erect?
16 cm (6.3 inches) erect bone-pressed ranks at approximately the 96th percentile worldwide — that puts you in the 👑 The King tier. Use the calculator above to get your exact result with girth included.
What percentile is 17 cm erect?
17 cm (6.7 inches) erect bone-pressed ranks at approximately the 99th percentile worldwide — that puts you in the 🐉 The Mythical Dragon tier. Use the calculator above to get your exact result with girth included.
What percentile is 18 cm erect?
18 cm (7.1 inches) erect bone-pressed ranks at approximately the 99th percentile worldwide — that puts you in the 🐉 The Mythical Dragon tier. Use the calculator above to get your exact result with girth included.
What percentile is 19 cm erect?
19 cm (7.5 inches) erect bone-pressed ranks at approximately the 99th percentile worldwide — that puts you in the 🐉 The Mythical Dragon tier. Use the calculator above to get your exact result with girth included.
What percentile is 20 cm erect?
20 cm (7.9 inches) erect bone-pressed ranks at approximately the 99th percentile worldwide — that puts you in the 🐉 The Mythical Dragon tier. Use the calculator above to get your exact result with girth included.
More Questions
What is a penis size percentage calculator?
A penis size percentage calculator — also called a penis size percentile calculator — takes your measurement and tells you what percentage of men you are larger than. For example, if you rank in the 70th percentile, you are larger than 70% of the comparison group. This penis calculator uses a normal distribution model based on published academic research data.
How accurate is this penis calculator?
This penis size calculator uses published mean and standard deviation data from peer-reviewed studies to model a normal distribution. It is a statistical estimate — accuracy depends on how carefully you measure and which reference population is used. It is intended for educational and entertainment purposes, not medical assessment.
Is this the same as a penis size percentage calculator?
Yes — a penis size percentage calculator and a penis size percentile calculator are the same thing. Both show you what percentage of men you rank above based on your measurement. Enter your length above to get your instant result.
Can I use this as a dick size calculator?
Yes — just enter your length and girth and hit Calculate. The tool works the same whether you call it a dick size calculator or a penis size calculator. Completely anonymous, works on mobile and desktop.
What is the average dick size?
Based on published academic research, the average erect size is approximately 5.16 inches (13.12 cm) in length and 4.59 inches (11.66 cm) in girth. Use the calculator above to see exactly where you rank compared to the worldwide average.
Is this a dick size percentage calculator?
Yes — enter your measurement and the calculator shows what percentage of men you rank above. Same tool, whether you call it a dick size percentage calculator or a penis size percentile calculator.
Penis Size Facts, Statistics & Every Name You've Ever Heard
Everything you actually wanted to know — the surprising statistics, the myths that won't die, and yes, every name humans have ever come up with for a penis.
📊 Surprising Penis Statistics
🗣️ Every Name for a Penis (The Complete List)
Humans have been remarkably creative when it comes to naming the penis. Here is the most comprehensive list you will find anywhere on the internet — from clinical to crude, ancient to modern.
This list is for educational, linguistic, and entertainment purposes. Now that you know every name for it — use the calculator above to find out how yours ranks.
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See Also
Curious about something else? Try our Body Count Calculator — see how your number of lifetime sexual partners compares by age and gender.