Guide Index
A total of 5 guides, each one explained.
20ft vs 40ft Container: How Much Can Each Actually Hold?
A 20GP holds 33.2 CBM, a 40GP 67.7 CBM, and a 40HQ 76.4 CBM on paper. In practice, plan on 25–28 CBM in a 20GP and 60–65 CBM in a 40HQ — here is the stacking math that explains why.
How to Calculate FBA Profit: Freight and Amazon Fees
A $24.99 product with $4.50 cost, $3.70 freight, $3.75 referral fee, and $5.10 FBA fee leaves $7.94 profit per unit — 31.8% margin. Here is the full per-unit math, and what it leaves out.
How to Calculate CBM for Sea Freight (With a Worked Example)
CBM is length × width × height × quantity. One 60 × 50 × 40 cm carton is 0.12 CBM; 100 cartons are 12 CBM. Here is the formula in cm and inches, plus the 1 CBM = 1,000 kg rule carriers use to charge you.
LCL or FCL: Which Is Cheaper for Your Shipment?
Below about 15 CBM, LCL usually wins; above it, FCL usually wins. At example rates of $45/CBM for LCL and $1,100 for a 20GP, the crossover is about 21 CBM — here is the math, plus the hidden LCL fees.
Volumetric Weight: Divide by 5000 or 6000?
Express couriers (DHL, FedEx, UPS) divide by 5000; air freight uses 6000. A 60 × 50 × 40 cm carton is 24 kg by courier math and 20 kg by air math — and you always pay the higher of volumetric and actual weight.