Google announced that it has added a new currency feature to AdSense, enabling publishers to view performance reports in currencies other than their specified payment currency.
Apparently this has been a much-requested feature, and Google has responded accordingly.
You can access the feature in your AdSense account, where you'll be presented with a bunch of currency options.
"Please note that when viewing performance reports in a different currency from your payment currency, monetary values might not be completely accurate due to currency fluctuations," notes Google AdSense payments specialist Miki Noda. "In addition, changing your reporting currency will not affect the currency in which you get paid."
Just go to the performance reports tab, click the Columns drop-down in the upper right corner, click the Currency drop-down, and choose a currency. Click apply. That's pretty much all there is to it.