The router should have information that tells you what the range is of that particular router. I have found that the lower costs routers seem to have a lower range for wireless activity.
You may want to use a linksys, or belkin brand as in the past I have had no problem with either of these two routers and they can be purchased at a local department store.
The maximum range for a router ranges up to 50 metres however, this is the best router you can get.Standard routers have a range of up to 25 metres as stated by two other users.
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James Shaw
Forum Moderator
Broadbandsuppliers Forum