It depends on the shipping option you chose. First Class International (the cheapest international ship option for light weight orders) takes between 7 and 21 business days (Monday to Friday, excluding holidays) to arrive. Formula's estimate of 2 weeks is right on the money for the faster deliveries of this ship method (2 weeks = 10 business days). It can, however, take longer (up to about 4 weeks) depending on a large number of factors.
For heavier packages, the cheapest ship option is typically Priority Mail International, which takes between 6 and 10 business days.