It varies from year to year for the cost of postage stamps. Right now in 2010, it cost around 44 cents for stamps..
25 American cents
In 1962 you could buy postages stamps in a variety of values. Assuming you meant to ask how much it cost to mail a letter, the answer is 4 cents for the first ounce, postcards were 3 cents.
Up until January 7th, 1968. it was 5 cents. Starting January 7th it was 6 cents.
The postage rate changed in May 2007. It was raised from 391 cents to 41 cents on May 7th. The second ounce of postage was reduced to 17 cents..