With shares of Facebook's stock going on sale the the general public today, it's piqued an interest in just how much Facebook founder Mark Zuckerberg is actually worth. In today’s IPO, Mr. Zuckerberg is selling $1.2 billion worth of stock.

Now, don't think that that will hurt how much claim he has to the company. On no. He's still going to be left with 503.6 million shares. Those shares are valued at $21.2 million.

If you want to follow his wealth today, check out The Wall Street Journal's handy “Mark Zuckerberg Wealth-o-Meter” that will fluctuate in real-time based on the stock price.

[The Wall Street Journal]