For a normal letter weighing 1oz or less a single first class stamp is all that would be necessary. For letters over 1oz or packages, you can determine the postage amount here:
http://postcalc.usps.gov/
typicaly 2 stamps
About one liberty stamp :)
1
75 cents.
only one
a standard letter can be sent anywhere in the United states with a single $0.55 stamp (or a forever stamp). The number of stamps depends on the cost of the postage, with is determined by the weight, if you were to try to send a letter that was heavier than 1 oz (1/16 of a pound), then you would need additional postage.
One. From USPS web site: "Forever Stamps can be used to mail a one-ounce letter regardless of when the stamps are purchased or used and no matter how prices may change in the future.
If it's a standard first class letter, it's one stamp (current 44 cents) regardless of location in US.
It takes three stamps to send a letter to Norway.
One first class stamp will carry a normal letter anywhere in the US.
It depends on the size and weight, but if it's a regular letter, a 44-cent stamp will suffice.
how many forever stamps = .94