Penis Size Percentile CheckerYour rank, and how many men you'd have to line up to find one like you.

1. 01

   Length: from the pubic bone on top to the tip

   Press a ruler lightly against the pubic bone on the upper side and measure straight to the tip. Angling the ruler or pressing hard into fat inflates the number.

2. 02

   Girth: circumference at the thickest point

   Wrap a tape or string around the thickest part and measure it. If you only know the diameter, switch to “Diameter” (we multiply by 3.14).

3. 03

   Erect means fully hard

   A half-erection reads small. For flaccid, measure at room temperature, not cold. Measuring a few times and using the middle value is more stable.

Rank is based on the overall score (average of the length and girth T-scores). 50 is average, 60 is top 16%, 70 is top 2%.

1. SSOff the charts70+0.2%
2. STop tier65+2%
3. ABig60+8%
4. B+Above average55+24%
5. BDead average45+76%
6. CA bit below40+92%
7. DSmall35+98%
8. ECompact< 35

• The baseline: 15,521 men measured by clinicians

  We use the nomograms built by Veale et al. (2015, BJU International) from studies where health professionals measured with a standard procedure. Erect length averages 13.12 cm (SD 1.66), erect girth 11.66 cm (1.10), flaccid length 9.16 cm (1.57), flaccid girth 9.31 cm (0.90).

• Self-reported surveys run large

  Online surveys and retailer data put the average around 13.5–14 cm, roughly 1 cm higher. Measuring methods vary, and smaller men are less likely to answer. We only use measured data, so this may feel stricter than averages you have seen elsewhere.

• No country-specific baseline

  There is no large public dataset of clinician-measured men for a single country. Measured studies find only very small differences between populations, so the worldwide measured data is the baseline.

• T-score vs percentile

  T-score = 50 + 10 × (your value − mean) ÷ SD. 60 is top 16%, 65 is top 7%, 70 is top 2.3%. 40 is bottom 16%.

Veale D, Miles S, Bramley S, Muir G, Hodsoll J. Am I normal? A systematic review and construction of nomograms for flaccid and erect penis length and circumference in up to 15 521 men. BJU International 2015; 115(6): 978-986. doi:10.1111/bju.13010

Erect or flaccid?

Erect is the reference. Flaccid size varies a lot with temperature and nerves, so treat it as a rough guide.

I only know the diameter

Switch to “Diameter” and we convert it to circumference (× 3.14).

Is my result stored?

No. Everything is calculated on your device and nothing is sent to our server. The share link contains your numbers, so choose who you send it to.

My score is low. Is something wrong?

No. The number only shows where you sit in the distribution. It says nothing about health or how good your sex life is. A urologist can answer any concerns.

The average is different from other sites

Self-reported surveys run about 1 cm large. We only use clinician-measured data.