It costs 28 cents as of 05/11/09 for postcards with a maximum size of 6" x 4.25".
The cost is 44 cents for larger postcards. For current info you can use the following link:
http://postcalc.usps.gov/Postcards.aspx
web site as of 3/27/2010
http://www.usps.com/prices/first-class-mail-prices.htm
Standard rate for a letter - currently $.44
.28 cents currently-they have a special stamp you can buy on their site in a roll or at the post office. Max size is 4x6" to qualify for postcard postage.
I just purchased one today and it cost $0.35
You can order them online from the USPS site in stacks of 10 ($3.50).
Well usually you just need one stamp like for birthdays cards, letters, and etc. But to make sure you could ask the postal service to weigh it and then they can tell you.
In which country and with what company?
.45 cents
It did cost $1.10 to mail a postcard in the US in 2003.
800 squid
Get a first class stamp
postage for a postcard sent from Australia to the U.S. costs AU$1.40.
The cost to mail a US postcard 6 inches by 4 1/2 inches is 32 cents as of Feb 2012.
A postcard that weighs around an ounce will be around thirteen dollars through international mail. The bigger the postcard, the more it costs. The cost can be as much as thirty dollars.
It was one cent to sent a postcard in 1920. The rate was established in 1898. It remained in effect until January of 1952.
32.00
COST STAMP MAIL POSTCARD FROM FRANCE INTERNATIONAL EUROS .86 As of 7/21/2009, the local post office here in Southern France told us that to mail a postcard from France to US is still a 0.86 euro stamp. AND IT WORKED! +++++ OOPS; THIS IS BACKWARDS...FROM FRANCE TO US, SORRY. Go to this website, you can get all the information about how much stamp costs from us to the other countries http://ircalc.usps.gov/default.aspx?Mode=Intl_Single&CID=10113
$.90 More information: http://pe.usps.com/text/Imm/fh_014.htm#ep3576772
It all depends on how much you'r postcard weighs. The more it weighs, the more money it will cost.
The current USPS postcard rate from the US to Chile is 94 cents.