How much weight per stamp us mail

The weight limit for a single stamp in the United States Postal Service (USPS) is 1 ounce (28.35 grams). This means that a letter or package weighing more than 1 ounce requires additional postage, which is calculated based on the weight and dimensions of the item.

Here's a breakdown of the USPS weight-based pricing for letters and packages:

Letters (1 oz or less)

• First-Class Mail: $0.55 (as of January 2022)
• Priority Mail: $7.50 (as of January 2022)

Letters (over 1 oz)

• First-Class Mail: $0.92 (as of January 2022) for each additional ounce (up to 3 oz)
• Priority Mail: $1.50 (as of January 2022) for each additional ounce (up to 3 oz)

Packages (over 3 oz)

• Priority Mail: $1.50 (as of January 2022) for each additional ounce (up to 13 oz)
• Priority Mail Express: $25.50 (as of January 2022) for each additional ounce (up to 70 lbs)

Large Envelopes (over 13 oz)

• Priority Mail: $4.50 (as of January 2022) for each additional ounce (up to 70 lbs)

Packages (over 70 lbs)

• Priority Mail: $25.50 (as of January 2022) for each additional pound (up to 130 lbs)

Please note that these rates are subject to change, and you should always check the USPS website or consult with a postal representative for the most up-to-date information.