calcSD

Percentile calculator

Measuring

In order to compare to the values described here, you should measure yourself properly.

Measuring your erect length should be done when you're fully hard with a ruler along the top of your member slightly pressed onto the pelvic bone (bone-pressed). If you have a strong curve to the left or to the right, you can use a piece of string instead that goes along the top, following the curve. Do not measure by the side or on the bottom.

Girth or circumference can be measured using a tailor's tape or a string. There's not a clear consensus if it should be measured along the base, along the middle or along the thickest area, so feel free to use any of those measurements, but do not measure it along the glans/head.