One 44-cent First Class stamp is all you need to mail a letter (weighing up to one ounce) anywhere within the United States. Postage is decided by the weight of the letter, not where it's coming from and going to. As long as the letter weighs one ounce or less, and is going to someplace within the U.S., it just needs one 44-cent stamp.
If the letter does weigh over one ounce, then you can go to the post office and either have a teller take care of it, or use one of the automated machines (if they have one). The machine will weigh the letter and print out the postage for you, but I'm pretty sure the machines only take credit or debit cards (no cash).
Put a 42 cent stamp on it. - Stuart
One stamp.
No, a forever stamp can only be used for domestic mail within the US. To mail a 1 oz letter from California to Australia, you would need international postage, which can be purchased at the post office or online.
one $0.45 stamp for a letter. more for heavier pacakages.
To mail a letter weighing no more than one ounce in the US to another US state or within a US state, the stamp as of February 2008 is 41 cents.
One. A standard .44¢ postage stamp.
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.
One. It needs to be a first class stamp and the letter needs to be one ounce or less.
Of course
The reason you need a stamp to mail a letter is because the stamp is the proof that you paid for your letter to be delivered. Instead of paying the mailman directly, and waiting for him to come to your house so you can pay the mailman to deliver your mail, the stamp proves that you paid for the delivery of the mail.
It depends on the size and weight, but if it's a regular letter, a 44-cent stamp will suffice.
A normal letter requires just one first class stamp to be delivered anywhere within the USA.