If you ever want to retire, you have to start saving money for it, which means coming up with a plan. There are plenty of calculators that will help you do that, but if you're new to the whole retirement planning thing, Fidelity's myPlan lays out the basics.
Just plug in a few simple details, including your age and savings, and the calculator will generate a chart detailing your retirement goal. But it also talks you through the process, explaining exactly what you're looking at, why it's important, and how the numbers change.
This is a US-based tool so some currency conversion may be necessary. Nevertheless, it presents basic retirement planning in an incredibly simple and easy-to-understand way. Give it a try for yourself at the link below.