Many people asking about shipping luggage back from Canada to China start with the kilogram question, then the price question. In practice, the order is exactly reversed: settle the channel first, then calculate the kilograms. For express shipping from Canada to China, the per-box weight limit is 25 kg with a 2-box minimum; for sea LCL (less than container load), the minimum is usually 2 to 3 cubic meters billed by volume, with a per-cubic-meter weight limit of about 200 kg. The two channels use different billing units, so applying a "total kilograms" mindset to sea freight often leads you astray from the very first step.
Let's follow one concrete scenario throughout: a tenant in North York, Toronto, ending their lease and returning to China in September 2026, living in Shanghai. The items fall into three groups — about 8 boxes of off-season clothing and books, one disassembled double bed frame and one desk, and one Dyson vacuum cleaner. The timeline: start 3 weeks before lease end, pick up the day after move-out.
Weigh first: per-piece weight and total weight are two different numbers
The first misconception is "the total weight isn't much, so express will work." Express looks at per-box weight and box count, not total weight. If you stuff all the books into one carton, the total may still be only 60 kg, but that single box has already crossed the hard 25 kg line; overweight fees are charged per kilogram, and the risk of damage during handling rises. Overweight portions typically cost an extra 60 to 80 yuan per kilogram depending on the route — a box of books 10 kg over the limit could see surcharges approach the base freight of a whole box.
The second misconception is "the weight is small, so sea freight must be expensive." Sea freight is billed by cubic meter, rounded up to 1 cubic meter for anything less, with a 2 to 3 cubic meter minimum. Eight standard cartons (40×50×60 cm) total about 0.96 cubic meters — still below the sea freight minimum, so express is the cheaper option for this volume.
Two numbers need to be pinned down first:
| Number | Basis | Reference threshold |
|---|---|---|
| Per-piece weight | The greater of actual weight and volumetric weight per box | Express: 25 kg per box; sea: single pieces ≥30 kg need 10 cm forklift clearance |
| Total shipment volume | Gross volume after packing, about 1.2× net volume | Sea: 2 to 3 cubic meter minimum; 10 standard boxes ≈ 1.2 cubic meters |
Volumetric weight is calculated as length × width × height ÷ 5000, and billed at whichever is greater versus actual weight. In the example above, the 8 boxes of clothing and books weigh about 90 kg actual, occupy about 0.96 cubic meters, and come to roughly 192 kg volumetric — billed by volumetric weight. That's exactly why "calculating by kilograms" doesn't work. Conversely, if all 8 boxes were dense books weighing over 200 kg actual, billing still uses volumetric weight; no extra charge applies no matter how heavy the actual weight, but no single box may exceed 25 kg, or you'll need to repack.
Conditions for using an air express line under 30 kg
The Canada-to-China express line has a 2-box minimum and a 25 kg per-box limit, with transit times of about 10 to 25 days (5 to 7 days flying plus 7 to 15 working days for customs clearance). To use express in the under-30-kg bracket, all of the following must hold:
- 2 boxes or more, none exceeding 25 kg;
- No furniture, and no single item with an edge longer than 1.1 meters;
- No liquids, powders, pastes, or appliances with built-in batteries;
- The delivery address is within the coverage area and no second delivery attempt is needed.
The 8 boxes of clothing and books in our example come to about 192 kg volumetric — above 30 kg, but still within the box-count structure of express, so express works; to get each box under 25 kg, you'd need to split into at least 8 boxes. Express channels do not offer door-to-door insurance; in the event of extreme loss, compensation is capped at twice the freight, and fragile labels are advisory only. Self-packed items are covered for loss but not damage, so you must do the interior cushioning yourself.
The 30 kg figure is itself a reference line: below it, express is the natural choice; above it, express isn't impossible, but you need to start checking box count, per-piece weight, and item categories, and the cost curve rises accordingly. Express quotes for Canada are calculated per box; the average per-box price for 8 to 10 boxes is usually noticeably lower than the 2-box rate — the more boxes, the more the per-box cost is diluted. Specifics are subject to real-time quotes.
The tipping point for switching to sea LCL above 30 kg
Once a single carton exceeds 30 kg, you've triggered the packing requirements of the sea freight leg (wooden crates or pallets need 10 cm forklift clearance); this specification has no counterpart in the express channel. To decide whether to switch to sea LCL (less than container load, sharing a container with other shippers), check whether any of the following holds:
- The list includes furniture, appliances, pianos, fitness equipment, or other items occupying more than 0.5 cubic meters per piece;
- Packed total volume reaches 2 cubic meters, or is expected to approach 3;
- A single piece exceeds 50 kg (cartons need woven bag reinforcement or must be converted to pallets or wooden crates);
- You need on-site packing, unpacking and reassembly, or duty-free declaration of used household goods.
In our example, the disassembled bed frame and desk take about 1.6 cubic meters; add 0.96 cubic meters of clothing and books, and the packed volume is about 3 cubic meters — just entering the sea freight minimum range. Door-to-door sea freight from Canada to China is billed by volume; the total for a 2 to 3 cubic meter shipment is typically in the tens of thousands of yuan, subject to real-time quotes. Mattresses face a separate anti-dumping policy on the Canada route, with inspection and back-tax risks, so the declaration basis must be confirmed before booking.
Two easily overlooked thresholds also matter: a per-piece billable weight of 80 kg triggers an extra handling fee; more than 5 commodity names on one shipment triggers customs clearance or commodity-name fees. Our example has only a few categories — clothing, books, furniture, vacuum cleaner — so it usually doesn't trigger these, but if you list kitchen gadgets and decorative pieces item by item, the count easily breaks the line. Consolidate by major category when declaring.
Why furniture and appliances don't go through express
The express channel moves box by box; there are no forklift stations on the sorting line. Furniture's problem isn't just weight: any edge over 1.1 meters triggers an oversize fee, over 2 meters is billed as a large segment, and over 3 meters must switch to the sea-truck channel; single pieces over 150 kg incur a domestic forklift fee, and over 68 kg in pallet or wooden-crate packaging incurs a foreign forklift fee at the destination port. The express channel has neither the stations nor the corresponding quote items.
Appliances with built-in batteries are dangerous goods; Dyson vacuum cleaners and cordless floor washers are prohibited from sea freight. In our example, the vacuum should have its battery removed and travel with the clothing boxes, or go in carry-on luggage. Cosmetics and skincare products are prohibited items on the sea route back to China; for small personal-use quantities, generally no more than 10 bottles is advised, with the excess carried on your person. Customs opens and inspects 100% of inbound items; concealment can't be solved by switching channels.
One more easily misjudged point: wooden crate outer packaging must use fumigation-free plywood or three-ply board, with openable latch hinges and 10 cm forklift clearance; if the goods or outer packaging contain raw or solid wood, fumigation plus commodity inspection is mandatory, starting at 750 yuan per shipment. Customers planning wooden crates for furniture must settle the material choice up front, or rework will be needed at the warehouse.
Prohibited and restricted items checklist
Tick each item before packing; anything that hits a prohibited category comes off the list and goes into carry-on luggage or gets left behind.
| Category | Handling |
|---|---|
| Food, tea, dried goods, medicine | Prohibited; carry on person |
| Cosmetics, skincare, perfume, hair dye | Prohibited by sea; small personal-use quantities up to 10 bottles may ship, excess carried on person |
| Power banks, bare batteries, items containing lithium batteries | Prohibited; some may ship after battery removal |
| Appliances with built-in batteries (vacuum cleaners, floor washers) | Prohibited by sea; assess after battery removal |
| Counterfeit luxury goods, unlicensed brand plush toys | Infringing; cannot be carried |
| Antique rosewood furniture pre-1949 | Prohibited from entering China |
| Marble, fragile ornaments | Shippable but not insured |
| Books | About 250-book cap for Chinese passport holders; over 50 books subject to tax; for books only, use the post office in batches of 50 or fewer |
| Vinyl records | No more than 100 per box; up to 20 duty-free, 21 to 100 taxed at 20% of value |
Two customs-clearance numbers are tied to identity: Chinese nationals declare personal used goods with a duty-free allowance of 5,000 RMB; the excess is declared at depreciated value, taxed at 13% to 20%, and must be handled within six months of the individual's entry, with the "Baggage Re-shipment Form" collected and stamped at airport customs on arrival. Foreign travelers declaring personal effects on entry have a 2,000 RMB duty-free allowance for clothing and footwear, and must provide a Chinese long-term residence permit valid for 365 days or more; first-time moves to China on a work visa may apply for duty-free entry. As of May 22, 2026, Beijing Customs requires the original passport for customs clearance of personal postal articles; copies or scans are no longer accepted.
There are also hard rules for the declaration itself: customs does not accept zero declarations — item values must be truthfully filled in; if the quantity of a single category clearly exceeds reasonable personal use, it may be deemed non-personal and denied clearance; customs does not accept shipping the same batch of items in separate lots, and shipping two batches under the same identity within a short period may also be denied. This is exactly why, when returning home at lease end, you should plan box count and volume in one go.
Handover points for door pickup and packing
The execution order for our example is as follows; missing any step compresses the customs timeline:
- Three weeks before lease end: confirm box count, heaviest single piece, and longest edge; submit the item list. No pickups abroad on weekends, so schedule pickup for the second working day after move-out.
- Pickup day: on-site packing and wooden crate construction are done by the Seapoe carrier's team; furniture disassembly, carton sealing, and numbering are completed the same day; outer boxes carry no consignee information, only the warehouse entry number.
- Before departure: verify volumetric and actual weights; confirm surcharge items (oversize, forklift, irregular packaging); raw or solid wood packaging requires mandatory fumigation.
- After arrival at port: storage fees start from the 4th working day after arrival, at 1 RMB/kg/working day — usually only about 50 RMB if timed with your return; customs clearance takes about 7 to 15 working days.
- Before delivery: confirm the truck can reach the address, there's an elevator, and items fit through on a hand truck; otherwise second delivery or manual handling fees apply.
The express side is the reverse: you pack yourself, billing is per box with no on-site packing, and pickup should be at least a week apart from the sea shipment. Allow mailing time for the passport and the "Baggage Re-shipment Form" — customs documents must be hand-signed in black pen at the designated spot, matching the passport signature; sending by SF Express next-day delivery is advised, as customs does not accept same-city courier or postal express. Declaration can only be filed the day after your return; sending early may mean paying storage rent for nothing.
Numbers to check before ordering
| Item | Value |
|---|---|
| Express per-box weight limit | 25 kg (22 kg on some US routes) |
| Express minimum | 2 boxes; general air freight minimum 50 kg |
| Express transit time | 10 to 25 days |
| Standard carton size | 40×50×60 cm or 40×45×60 cm, about 0.12 cubic meters per box |
| Sea freight minimum volume | 2 to 3 cubic meters, billed to 0.1 cubic meter, rounded up to 1 cubic meter |
| Sea freight weight limit per cubic meter | 200 kg |
| Volume increase after packing | About 1.2× net volume |
| Sea freight total transit time | 1 to 3 months |
| Oversize trigger | Oversize fee from 1.1 meters per edge; over 2 meters billed as large segment; over 3 meters switches to sea-truck |
| Forklift fee trigger | Domestic >150 kg; foreign >68 kg in pallet or wooden-crate packaging |
| Customs clearance window | Within six months of entry; clearance takes about 7 to 15 working days |
| Duty-free allowance | 5,000 RMB for Chinese nationals; 2,000 RMB for foreign travelers' clothing and footwear |
| Tax rate above allowance | 13% to 20%; combined rate about 23% for some categories |
| Storage fee | From the 4th working day after port arrival, 1 RMB/kg/working day |
The following situations should not be judged on your own — confirm with a human before quoting: single pieces over 150 kg or over 2 meters per edge; lists containing pianos, marble, rosewood furniture, artwork, or branded appliances; mattresses shipped to or from Canada; consignees who are foreign nationals or hold non-Chinese passports; entry dates approaching the 6-month limit; a second batch to ship under the same identity within a short period (customs does not accept shipping the same batch in separate lots, and shipping two batches under the same identity in a short period may also be denied); categories requiring mandatory fumigation for raw or solid wood outer packaging. For these combinations, the declaration basis, surcharges, and acceptability change with current policy and channel status, and should be calculated by a service consultant under real-time conditions, subject to real-time quotes. Sea freight rates fluctuate continuously with fuel, capacity, and geopolitical conditions; customers who lock in capacity early are usually more comfortable than those booking at the last minute. Seapoe recommends reporting box count, heaviest single piece, and longest edge all at once before ordering, so quotes are comparable.
By quote form, phone, email or WeChat — we reply promptly Get a Quote