Quick answer: Yes. You may place two valid Forever stamps on one envelope. At the current 82-cent value, two ordinary Forever stamps provide $1.64 in postage. Whether that amount is correct depends on the mail class, weight, dimensions, and machinability.
What two Forever stamps cover
| Example at July 12, 2026 rates | Required postage | Two Forever stamps |
|---|---|---|
| Standard domestic letter, 1 oz | $0.82 | Enough, but overpays $0.82 |
| Standard domestic letter, 2 oz | $1.11 | Enough, but overpays $0.53 |
| Qualifying large envelope, 1 oz | $1.69 | 5 cents short |
For a two-ounce standard letter, one ordinary Forever stamp plus an Additional Ounce stamp is usually a closer match than using two ordinary Forever stamps. For a 9×12 flat, see the 9×12 envelope calculation.
When adding another stamp makes sense
- You have calculated the total required postage and need to combine denominations.
- The mailpiece is heavier than one ounce.
- A valid surcharge or extra service requires additional postage.
When two stamps can still be wrong
Two stamps can be too much for a standard one-ounce letter and still not enough for some large, rigid, thick, or international pieces. Stamps pay value; they do not by themselves determine the correct mail classification. Measure and weigh the finished envelope first.
For a complete calculation path, use How Many Forever Stamps Do I Need? and the USPS Postage Price Calculator.
Source checked: USPS letter and postcard guide. Rates can change; verify before mailing.