How much is USA's money worth to Englands. like if something says �210 , how much is that. And what is a good way to know how much something there is for USA people?
The current exchange rate is �1 = $1.9164 although you would be unlikely to get that in a bureau de change. Actually I've just checked the tourist rate which is closer to $1.8, so buildersmate is correct after all.
Rates change all the time, and the 'official rate' is not what you would get from your bank or credit card company if you bought something in pounds.
For rough calculations, �1 = $2 would give a fair approximation.