At current values, two domestic Forever stamps are not enough for the $1.75 base international letter price. Each domestic Forever stamp is worth 82¢, so two total $1.64. Three total $2.46 and overpay. One Global Forever stamp is the straightforward base option for an eligible one-ounce letter or postcard.
| Option | Postage supplied | Result for eligible $1.75 base item |
|---|---|---|
| 1 domestic Forever | $0.82 | Short by $0.93 |
| 2 domestic Forever | $1.64 | Short by $0.11 |
| 3 domestic Forever | $2.46 | Covers but overpays $0.71 |
| 1 Global Forever | $1.75 | Exact base amount |
When this table does not answer the question
- The letter weighs over one ounce
- The mailpiece is rigid, oversized or a large envelope
- It contains merchandise or needs customs documentation
- The destination has restrictions or different available services
- You add tracking, registration or another service
In those cases, calculate the exact price first. Domestic Forever stamps can still contribute their value if valid, but the correct number follows from the required dollar amount—not from a universal international stamp count.
Prepare the letter
- Confirm contents and destination-country rules.
- Seal, measure and weigh the finished item.
- Use the USPS international calculator.
- Choose Global Forever, denomination stamps or another accepted payment method.
- Write the address in the destination’s preferred format and include a U.S. return address.
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