USPS Forever Stamp Weight Limit:
Maximum Weight = 1 oz per Forever Stamp
From: | To: |
A Forever Stamp is a first-class mail stamp from the US Postal Service that always carries the current value of a one-ounce first-class mail letter, regardless of when it was purchased. Each Forever Stamp covers the postage for one ounce of mail.
The calculator uses a simple formula:
Number of Stamps = Ceiling(Weight in ounces)
Where:
Explanation: The calculation ensures you have sufficient postage for your mail piece based on USPS first-class mail requirements.
Details: Using the correct number of stamps ensures your mail is delivered without delays or additional postage fees. Insufficient postage may result in your mail being returned or the recipient being charged for the postage due.
Tips: Weigh your mail piece accurately using a postal scale. Enter the weight in ounces. The calculator will determine how many Forever Stamps you need to properly mail your item.
Q1: What if my mail weighs more than 1 ounce?
A: You need additional Forever Stamps. Each additional ounce requires another Forever Stamp.
Q2: Can I use Forever Stamps for international mail?
A: Forever Stamps are only valid for domestic first-class mail within the United States. International mail requires Global Forever Stamps or additional postage.
Q3: What about odd-shaped or large envelopes?
A: Non-standard envelopes may require additional postage even if they weigh less than 1 ounce. Check with your local post office for non-standard items.
Q4: Do Forever Stamps expire?
A: No, Forever Stamps never expire and can be used indefinitely regardless of future price increases.
Q5: Where can I purchase Forever Stamps?
A: Forever Stamps are available at post offices, online at usps.com, and at many grocery stores, pharmacies, and other retail locations.