How Much does It Cost to Mail a Letter?

The cost to mail a letter is determined by how many ounces it weighs, and the shape of the envelope. If the letter does not weigh over 1 ounce, then it’s 44 cents. If it’s 2 ounces, the cost will be 61 cents. If the letter is not over 3 ounces, then it’s now 78 cents.