Please, note that those converters give an
"average" rate, valid in "one financial place"
(or an average of various financial place) for
"electronic" transaction that is neither buying
nor selling.

What that's mean ? That it's never the real
rate.

1) The rate will be differant in each country.
2) In some countries, there may be taxes on
   an exchange transaction
3) Rates for selling are not the same as those
   for selling. You always get a _worse_ rate.
   (bank buy cheaper and sell higher. That's
   how they gain money)
4) Banknote rates are the worse.

In all, the rate is always worse than what
those converts tell you by a couple of %.

Cheers,
Yann Stettler