$1.00
A one ounce letter will cost you $.49 to mail. The fee for mailing a letter just increased in January.
The rate was 20 cents in 1982. That was for the first ounce of mail. A second ounce was 17 cents.
A 2 ounce letter costs $1.10 to mail from New Jersey to Ontario, Canada. A 4 ounce letter costs $2.65.
44 cents for any letter under one ounce.
The cost to mail a first class letter to the Bahamas from the US is .65 cents. Air mail that is one ounce or less is $1.10.
3 cents in the United States up to one ounce.
To mail a first class letter from the US to Canada is $1.15 as of 2014. This is for 1 ounce or less. More than an ounce will cost additional.
It will cost you 98 cents for an ordinary up to 1-ounce letter.
Current postal rate is 44 cents for the first ounce or fraction thereof. (United States)
As of my last update, the cost to mail a 6-ounce letter within the United States using First-Class Mail is typically based on the weight and size of the letter. For a letter weighing more than 1 ounce, the price increases incrementally. You would need to check the current USPS rates for the exact cost, which can vary based on factors such as destination and service type.
Currently, May 2015, in the US one ounce of First Class mail is 49 cents.