How Much Does An Additional Ounce Of Postage Cost
USPS postage rates offer low-cost mailing and shipping prices for domestic & international customers. See Forever postage stamp prices and other postage rates. A standard 1-oz USPS letter costs $0.78 in 2025 (rates effective July 13, 2025).
See postcard, extra-ounce, large envelope, and international letter prices. Wondering how many stamps per ounce you need in 2025? Here's the complete guide to current USPS postage rates, Forever Stamps, and practical mailing tips. Sending mail can get complicated when you have an envelope or package that weighs more than one ounce.
While forever stamps cover postage for standard 1 ounce letters, you'll need additional postage for heavier items. That's where additional ounce stamps come in - they provide a convenient and affordable way to make up the difference. In this comprehensive guide, I'll tell you.
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Postage Information As of July 13, 2025, the cost for a regular First Class Mail Forever Stamp is 78 cents, the surcharge cost for a non-machinable envelope remains 46 cents, and the cost for each additional ounce over one ounce is 29 cents. The Butterfly Stamp cost increases to $1.27 and works for all square []. Learn about the true cost of USPS Additional Ounce stamps.
Understand pricing and postage optimization for domestic and international shipments. You will need to add "Additional Ounce" stamps or combine multiple Forever stamps to cover the total postage cost. Non-Machinable Items: Square envelopes, rigid items, or lumpy letters often require extra postage, even if they are under the weight limit.
The price for each additional ounce will remain at 27 cents per additional ounce. This means that a flat that weighs 2 ounces, for example, requires $1.77 in postage. Letters metered at 1 ounce will also hike in cost, from 69 cents to 74 cents, while the additional.
