Penis Percentile Calculator
This is an outdated version of calcSD. It will no longer receive any updates.


calcSD is a website made to accurately and easily present the rarity of penis sizes, using scientific data. This website runs all its calculations and such in JavaScript on-the-fly. It was also made in a simple way so that, should any more reliable studies appear later on, it will be easy to implement them in here. More about the calculations and datasets used can be seen in this page.

It was inspired by How long is my schlong? and abovethemeans' volume calculator. The former website, HLiMS for short, had a few issues which I wanted to fix in calcSD, mainly the fact that it looks up percentages in a fixed table for every 0.2 increment (meaning values in between are rounded downwards), but also that it uses outdated data from an old research, Hungfun's Average.

This website was made in my free time as a fun little project to do, not only to provide better data for people but also to improve my skills with math, JavaScript, HTML, and CSS. Making websites by hand isn't easy, but it's better than to make it using automated services, those tend to include a metric ton of unnecessary code that only slows down pages.

I tried making it as lightweight as possible while still looking modern and having a lot of functionality, but please excuse me for any design flaws, I'm still learning. I value privacy, so absolutely no data is collected when you visit the site or make any calculations in it, at least, none I can control. I have no way to tell how many people, if any, even visited this page.

Clicking on the "Switch Themes" button will use cookies, which are needed to maintain the same theme even when you exit the page and reopen it later. If you want to delete these cookies for whatever reason, click here.


This website was created by /u/HrDedgeh (mostly inactive) with help from /u/FrigidShadow. Want to yell at us for whatever reason? Go to the feedback page here! pls don't actually yell at us...

Other Websites

You can find other helpful and informative webpages which also deal with the topic of penis size if you go to our external sites page here.


You can find a record of updates and other site changes if you go to our changelog here.