UPS quotes a live number for the exact box and address entered, the same way it does domestically. USPS instead sells a small set of fixed postal products, each with one starting price that applies across a broad group of countries rather than one address. The two are not offering the same thing at different prices — they are two different pricing systems, and on SMKlog's own checkout only one of them showed up at all.
UPS answers a specific address. USPS answers a group of them at once.
The same 8 × 6 × 5 in, 2 lb box, from Berkeley Heights, NJ 07922, run through SMKlog's production checkout on 2026-08-31. UPS priced three of the four lanes SMKlog sells online; it returned no rate on the fourth.
| Destination | UPS service | Price | Delivery days |
|---|---|---|---|
| Toronto, Canada | UPS Standard | $25.83 | 2 |
| London, United Kingdom | UPS Worldwide Economy DDU | $36.17 | 8 |
| Sydney, Australia | UPS Worldwide Economy DDU | $52.96 | 8 |
| Berlin, Germany | No UPS rate returned | — | — |
Every one of those four rows is real, in the sense that a live rate request went out and this is what came back. None of them can be extended to a different weight, box or address by eye — UPS's international pricing moves with all three at once, which is exactly the property USPS's postal products do not have.
USPS does not price a specific address. It runs three international products, each with one starting retail price that covers the cheapest destination group at the lightest weight, read from usps.com on 2026-09-01.
| USPS product | Starting price | Weight ceiling | Stated delivery |
|---|---|---|---|
| First-Class Package International Service | $19.40 | 4 lb | Delivery varies by destination |
| Priority Mail International | $32.65 | 4 lb envelope, up to 70 lb by weight | 6–10 business days to many major markets |
| Priority Mail Express International | $62.70 | 4 lb envelope, up to 70 lb by weight | 3–5 business days |
Both of the two USPS products with a stated delivery window carry the same qualifier: the actual number of days can move with the origin, the destination and customs delays. That is the same caveat a live UPS quote carries in different words — a quoted or published number is a planning figure, not a receipt.
The capture behind the UPS table above quoted all four lanes at once, and USPS did not appear on a single one of them. That is not a gap in this page — it is what the live rate request actually returned.
UPS's rate engine answers a specific origin, destination, weight and box together. USPS's international products are priced as a small number of fixed tiers against destination groups, which is a different kind of pricing that does not plug into the same live rate request.
USPS still sells First-Class Package International, Priority Mail International and Priority Mail Express International directly, at a Post Office counter or through Click-N-Ship. What did not happen is USPS pricing through SMKlog's own checkout on this specific capture.
For a real USPS price on an exact box, the starting prices in the table above are a floor, not a quote — the next step is usps.com's own postage calculator or a Post Office counter, not this checkout.
Both carriers require a customs declaration on an international parcel, and both build it into the label-buying process rather than treating it as a separate errand.
USPS assigns a specific PS Form to each product — 2976-B for Priority Mail Express International, 2976-A for Priority Mail International, and 2976 or 2976-A for First-Class Package International Service depending on contents and weight — produced through Click-N-Ship, Customs Forms Online, or a USPS-approved vendor rather than handwritten. UPS collects the same underlying fields (contents, declared value, country of manufacture) as part of building the international label; SMKlog's own checkout does the same before payment on the four lanes it sells online, and neither UPS's system nor SMKlog's produces a USPS-format PS Form, because the shipment never rides on USPS's network. The mechanics of which USPS form applies are covered in full on the customs form guides linked below rather than repeated here.
Both carriers revise prices and which services price through any given checkout without notice. Treat the figures above as what each source stated on the date shown, and quote the actual box for a number to rely on.
It depends on the box, because the two carriers do not price the same way. UPS quoted a 2 lb parcel through SMKlog's checkout at $25.83 to Canada, $36.17 to the United Kingdom and $52.96 to Australia on 2026-08-31. USPS publishes flat starting prices instead — $19.40, $32.65 or $62.70 depending on the product — but those figures cover a lighter, smaller parcel and a specific box shape, not the same carton UPS quoted.
USPS returned no line item at all on the same four-lane capture that priced UPS, FedEx and DHL Express on 2026-08-31. That is a fact about which carriers price through this specific checkout, not a claim that USPS cannot ship those countries — USPS sells its own international products directly, just not through this rate engine.
Neither wins outright. USPS states 3–5 business days for Priority Mail Express International and 6–10 business days for Priority Mail International, both with a customs-delay caveat, per usps.com read 2026-09-01. UPS's own live quotes ran 2 business days to Canada and 8 business days to the United Kingdom and Australia on the Worldwide Economy DDU tier — the day count sits inside USPS's stated range on some lanes and outside it on others.
Yes. USPS requires a complete, computer-generated customs form for its international products, produced through Click-N-Ship, Customs Forms Online or a USPS-approved vendor. UPS collects the same category of information — contents, value, origin — as part of building the international label, whether at ups.com or through a checkout like SMKlog's that fills it in before payment.
For UPS, FedEx and DHL Express, yes: type the box and destination into SMKlog's calculator and it prices whichever of those three serve the route. USPS does not return a rate through this checkout on any of the four countries it sells to — Canada, the UK, Germany and Australia — so a USPS price has to come from usps.com or a Post Office counter instead.