Whatever your living expenses are in Britain, budget about the same for Europe, keeping in mind that you want to [as much as possible] do things on the cheap (don’t eat at restaurants too often, stay at hostels or budget hotels, etc).

The main expenses I found whilst traveling is always transport (from city to city – althought not that expensive) and accommondation.

If you budget around £200 pounds in the UK per week then you will easily survive on that a week in Europe.

2-3 Weeks is a small time fram but you just need to plan and decide where you would like to go. What do you really want to see and do. And only go to 1-3 countries in that time.

If you are worried about your money then go to Portugal/Spain or go to Eastern Europe.