Yes, you can use two Forever stamps together. As of August 31, 2026, each ordinary Forever stamp is worth 82 cents, so two provide $1.64 in postage. Whether that is enough depends on the mail class, destination, weight, dimensions and any nonmachinable charge—not simply the number of stamps.
How Much Are Two Forever Stamps Worth?
Two ordinary domestic Forever stamps equal $1.64 at the current 82-cent one-ounce stamped-letter rate. They keep tracking that rate when USPS prices change, so recalculate the total using the current value when you mail.
How Much Weight Do Two Forever Stamps Cover?
For a standard rectangular, machinable domestic First-Class Mail letter, current postage is 82 cents for the first ounce plus 29 cents for each additional ounce. That makes two Forever stamps enough for a letter weighing up to 3 ounces, with some postage left over. They are not enough for a 3.5-ounce letter at current rates.
| Standard domestic letter weight | Current postage | Two Forever stamps ($1.64) |
|---|---|---|
| 1 oz. or less | $0.82 | Covers it; overpays $0.82 |
| Over 1 oz. through 2 oz. | $1.11 | Covers it; overpays $0.53 |
| Over 2 oz. through 3 oz. | $1.40 | Covers it; overpays $0.24 |
| Over 3 oz. through 3.5 oz. | $1.69 | Short by $0.05 |
These examples apply only to an eligible machinable letter. A square, rigid, unusually shaped or oversize envelope may cost more. A large envelope, postcard, package or international item follows a different price structure.
Can Two Forever Stamps Be Used for Extra Postage?
Yes. Forever stamps can be combined with each other or with denominated stamps. USPS applies their total current postage value. Extra postage is allowed, but routine overpayment is not refunded, so adding smaller-denomination stamps is usually more economical when the shortfall is less than 82 cents.
Do You Need Two Forever Stamps?
Not for a standard one-ounce domestic letter; one ordinary Forever stamp covers that category. You may need more than one stamp when a letter is heavier, has a nonmachinable characteristic, or uses another mail category. Calculate the required price first, then apply stamps totaling at least that amount.
Common Examples
- 1.5-ounce or 2-ounce standard letter: two Forever stamps cover it, but smaller additional-ounce postage would reduce overpayment.
- 3-ounce standard letter: two Forever stamps cover the current $1.40 price.
- 3.5-ounce standard letter: two Forever stamps are five cents short at current rates.
- International one-ounce letter: two ordinary Forever stamps total $1.64, which is short of the current $1.75 international letter price.
- Package: do not infer eligibility from stamp count; calculate the package service price and follow counter-deposit rules when applicable.
Use the postage calculator and decision guide, see Forever stamps on packages, or check the current value of one Forever stamp.
Frequently Asked Questions
Can I put two Forever stamps on one envelope?
Yes. Their combined current value is valid postage. Check the finished envelope’s mail class, weight, size and shape to determine whether $1.64 is enough.
Will two Forever stamps cover two ounces?
Yes, for a standard machinable domestic letter. The current two-ounce price is $1.11, so two Forever stamps overpay.
Will two Forever stamps cover three ounces?
Yes, for a standard machinable domestic letter. The current three-ounce price is $1.40. Additional charges can change the answer.
Rates checked August 31, 2026: USPS Notice 123 price list. Rates and eligibility rules can change.