Current US rate is 44 cents.
It currently costs 44 cent to mail a regular envelope, which is the price for a stamp.
The current cost of a first class mail stamp is 49 cents.
In 1900 the price of a stamp to mail a letter was 2 cents. In 2008 a first class postage stamp cost 42 cents.
The cost of a Royal Mail first class stamp is 60p. The price of a Royal Mail second class stamp is 50p. A first class large letter stamp is priced at 90p. A second class large letter stamp is priced at 69p.
If you are sending a normal-sized letter, you would need $0.49 total of stamps to mail it from Indiana to California. You could use a Forever stamp or a combination of other stamps that equals $0.49.
In France, the cost of a first class stamp to mail a regular letter up to 20 grams costs 0.56 euros. For mail sent to continental European countries, the cost is 0.80.
A regular letter costs $1.05 from the US to Luxumburg See: http://postcalc.usps.com/
44 cents
The present cost to mail an ordinary letter in the US is 44 cents.
44 cents to mail it first class
$0.45 cents
To mail a single letter to Canada, the stamp must be equivalent to the postage cost. As long as the stamp is equal to the postage, any letter can be sent with any kind of postage stamp.