Enter your carton size, weight and quantity. Get your CBM, chargeable weight, the best shipping mode, a transit-time estimate and indicative China-to-worldwide rates in one click.
Fill in your carton details on the left and press Calculate — here's what you'll get:
CBM (cubic metres) = length × width × height in metres. From centimetres: (L × W × H) ÷ 1,000,000 × number of cartons. It is the single most useful number for any sea freight shipment.
Volumetric (dimensional) weight converts size into a billable weight because carriers charge for the space you take, not just the mass. Air freight uses a 6000 divisor, courier express (DHL/UPS/FedEx) uses 5000: (L × W × H in cm) ÷ divisor.
Chargeable weight is the greater of gross weight and volumetric weight. Dense cargo is charged on actual weight; light, bulky cargo is charged on volume. Density (kg per CBM) is the quick tell: below about 167 kg/CBM your air shipment is priced by volume, above it by weight.
| Mode | Billing basis | Best for | Typical China→worldwide transit |
|---|---|---|---|
| Courier express (DHL/UPS/FedEx) | Chargeable weight, divisor 5000 | Samples, urgent, under ~200 kg | 3–6 days |
| Air freight | Chargeable weight, divisor 6000 | Urgent or high-value, ~100 kg–5 CBM | 3–8 days |
| Sea LCL (part container) | Per CBM or weight ÷ 1000, whichever is greater | Mid-size, non-urgent, ~2–15 CBM | 20–40 days |
| Sea FCL (full container) | Flat per container (20ft/40ft/40HC) | Bulk, ~15 CBM and up | 20–40 days |
| Rail (China→Europe) | Per CBM / container | Europe, middle ground on speed and cost | 16–25 days |
Need it door to door with duties included? Our DDP shipping rolls freight, customs and delivery into one price, and Amazon FBA first-mile delivers straight to the fulfilment centre.
CBM = length × width × height in metres. For a carton in centimetres, multiply L × W × H and divide by 1,000,000, then multiply by the number of cartons.
The greater of your actual gross weight and the volumetric weight. Air uses a 6000 divisor, express 5000, and sea LCL charges on whichever is greater: CBM or weight at 1,000 kg = 1 CBM.
Small, urgent or high-value loads go by express or air. Above roughly 15 CBM a full container by sea is usually cheapest. Mid-size 2–15 CBM cargo often goes sea LCL, and dense cargo can favour sea on cost per kg.
No. They are indicative planning ranges that move with lane, season, fuel and volume. Send your details to Ren Fu Ren for a binding all-in price within 2 hours.
No, they are freight only. Duties and destination taxes depend on HS code and country. Ask for a DDP quote to see one all-in price with duties included.
Send your cartons, weight and destination. We quote air and sea side by side within 2 hours.
