how much does it cost to send a 3 ounce letter
In fact, letter-size mailings have varying postage rates based on weight. You can mail a 1 ounce letter for $0.44. If the letter weighs more than that but less than 2 ounces, you need to pay $0.61. Letters up to 3 ounces will run you $0.78 in postage.Finally, you can send a letter up to 3.5 ounces for $0.95. Send a letter that weighs more than 3.5 ounces and your postage rates bump up considerably. USPS will charge flat-size prices (or even parcel prices) for letter-size mail that exceed 3.5 ounces in weight.A 4 ounce flat envelope runs $1.39, so you may find that a 3.6 ounce letter will cost you $1.39 to mail.n fact, letter-size mailings have varying postage rates based on weight. You can mail a 1 ounce letter for $0.44. If the letter weighs more than that but less than 2 ounces, you need to pay $0.61. Letters up to 3 ounces will run you $0.78 in postage.