Postal Logistics
International Letter Postage Calculator
Ensure your letter arrives without postage-due delays. Calculate accurate domestic and international postal rates across USPS, Royal Mail, and Universal Postal Union carriers.
Postal Rates & Logistics
International Letter Postage Calculator
Calculate standard stamps, international airmail postage, customs thresholds, and estimated postal transit days.
Letter Weight & Stationery Thickness: 1.0 oz (Standard 2–3 sheets)
1 oz (Single Stamp) 2 oz (Heavy Cotton) 3 oz (Photos/Gifts) 4 oz (Max Letter Rate)
Postage Specification:
5–8 Business Days Required Postage Cost: $0.73 (1 Forever Stamp)
Recommended Stamps: 1x Standard Domestic Forever Stamp
Customs Declaration (CN22): Not Required (Personal Letter Only)
Helpful Tips for Mailing International Letters
- Wax Seal Precaution: Hand-stamped wax seals can catch in high-speed automated sorting machines. If you use a wax seal, ask your postal clerk to "Hand Cancel" the envelope or enclose it inside an outer envelope.
- Weight Limit: A standard first-class stamp covers up to 1.0 ounce (approx. 28 grams), which comfortably holds 3 sheets of standard 20lb paper plus envelope.
- Enclosing Small Flat Gifts: Flat items like stickers, tea bags, and paper bookmarks are permitted in standard letters. Rigid items like coins or pens require parcel rates.