How many stamps for domestic mail

The number of stamps needed for domestic mail in the United States depends on the weight and size of the mailpiece, as well as the destination. Here are the current rates for domestic mail:

Letters (1 oz or less)

• First-Class Mail: 1 stamp (currently $0.55)
• Priority Mail: 1 stamp (currently $7.50)

Large Envelopes (1 oz or less)

• First-Class Mail: 2 stamps (currently $1.10)
• Priority Mail: 1 stamp (currently $7.50)

Packages (up to 13 oz)

• First-Class Package Service: 1 stamp (currently $0.55)
• Priority Mail: 1 stamp (currently $7.50)

Packages (over 13 oz)

• First-Class Package Service: additional $0.15 per ounce (e.g., 14 oz = $0.70)
• Priority Mail: additional $1.50 per ounce (e.g., 14 oz = $9.00)

Special Services

• Certified Mail: add $3.45 to the regular postage rate
• Return Receipt: add $1.45 to the regular postage rate
• Signature Confirmation: add $2.95 to the regular postage rate

Note: These rates are subject to change, so it's always a good idea to check the official USPS website or consult with a postal worker for the most up-to-date information.

I hope that helps!