Many web sites that sell products or services these days sell them in multiple currencies and now Google AdWords will let you track those conversion values in the currency you sell them in.
Google quietly announced on Google+ that now you can add currency information to your conversion values.
Now when you add currency information to your conversion values, all of the sales that you generate will be converted into the same currency used for Google AdWords billing. AdWords will convert the payment currency from euros and dollars to pounds, so you don’t have to. Google said "when you have both your costs and sales all in one currency, you can calculate a more meaningful return on investment."
You can specify the currency value within the settings for a conversion action, or when setting up a new conversion action. When setting the value for a conversion action, simply pick the currency you want to use from the menu. If you're providing transaction-specific conversion values in your conversion tracking tag, you can also specify a currency to associate with the value by using the variable "google_conversion_currency" in the code. You'll need to use the appropriate ISO 4217 standard 3-letter code for the currency, which you can find on this page.
For more details on how to set this up, see the help docs.
Forum discussion at Google+.
