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How much does a single U.S. postage stamp cost?

What is the postage stamp cost to mail a single letter out in the mail using an envelop? How much is does one forever stamp cost?

1 Answer


The cost of a single first-class forever stamp to mail a single letter (envelope) is $0.49

The cost to mail a postcard is $0.35

The cost of a book of stamps is currently $9.80. You get 20 forever stamps in a book of stamps. 

You can actually buy stamps online at and get FREE postage!  Currently, it only costs $0.485 per stamp to send a First Class Mail Letter (1 oz.) with

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