Anyone who runs a website knows that a successful site has to have a high Google PageRank. Unfortunately, though, Google updates their publicly available PRs only every a few months. Moreover, the PR is only given in discrete increments, so it is hard to know whether a site improved if the actual increase is less than a PR point on average. Given that I am curious about the PR of my site, I thought I should do something. And I did, the bottom line of which is a calculator to estimate the PageRank of any site you wish.