A standard machinable domestic letter starts at 82¢, but heavier, square, rigid, large, or international mail can cost more.
Letter prices by weight
| Weight not over | Postage | Example |
|---|---|---|
| 1 oz | 82¢ | 1 Forever Stamp |
| 2 oz | $1.11 | 1 Forever + 1 Additional Ounce |
| 3 oz | $1.40 | 1 Forever + 2 Additional Ounce |
| 3.5 oz | $1.69 | 1 Forever + 3 Additional Ounce |
When the simple table does not apply
Nonmachinable letters, large envelopes, international letters, and items over letter limits use other prices. Certified Mail and other services add fees.
Prepare one sample first
For invitations or a large mailing, assemble one complete envelope with every insert, then weigh and measure it before buying the full quantity of postage.
Frequently asked questions
How much does one ordinary letter cost?
82¢ when it is a qualifying one-ounce domestic stamped letter.
Can I use two Forever Stamps?
Yes, but that would affix $1.64 and can overpay many ordinary two-ounce letters.
What if my letter weighs more than 3.5 ounces?
It no longer uses the ordinary First-Class Mail letter table; evaluate it under the applicable large-envelope or package rules.
Sources and update note
- USPS Notice 123 — current price list
- USPS DMM 101 — physical standards
- USPS DMM 604 — postage payment methods
Rates and mailing standards can change. This page was reviewed in August 2026; verify the completed mailpiece when its weight, dimensions, shape, destination, or services are uncertain.