Shipping Knowledge Base
Practical guides on volumetric weight, chargeable weight and freight billing.
Chargeable Weight vs Actual Weight vs Gross Weight
Chargeable weight vs actual weight: what your scale says against what your invoice says. Gross is actual; volumetric, dimensional and cubic are one idea.
Read more →CBM to KG: Why 1 CBM Is Not a Fixed Number of Kilos
CBM to kg has no single answer: 1 CBM bills as 1,000 kg by sea, 250 kg on AU cubic, 200 kg by courier and 167 kg by IATA air. The four rules, worked.
Read more →USPS Dimensional Weight 2026: DIM Divisor 139 vs 166
USPS dimensional weight changed on 12 July 2026: divisor 166 → 139, dimensions round up to the whole inch. Formula, the 1 ft³ threshold, and what it costs.
Read more →Air Freight vs Courier vs Sea: Which Is Cheaper?
Air freight, express courier or sea freight — which is cheaper? The volume break-points where each mode wins, with the same shipment priced all three ways.
Read more →Why Your Shipping Bill Is Higher Than You Calculated
Your bill beats your calculation for seven specific reasons — dimension round-up, per-piece billing, minimum billable weight and four more. How to audit it.
Read more →Volumetric Weight Formula: Every Divisor, Explained
The volumetric weight formula step by step: L × W × H ÷ divisor, every carrier divisor (5000, 6000, 4000, 139), cm and inch examples, and common mistakes.
Read more →10 Proven Strategies to Reduce Your Shipping Costs
Actionable tips to cut shipping expenses including right-sizing packaging, carrier negotiation, shipment consolidation, and dimensional weight optimization.
Read more →FedEx vs UPS vs DHL: Which Carrier Is Best?
An in-depth comparison of FedEx, UPS, and DHL covering volumetric divisors, pricing, service areas, transit times, and ideal use cases for each carrier.
Read more →Complete Guide to Calculating Shipping Costs in 2026
Calculate shipping costs in 2026: chargeable weight, carrier divisors, fuel surcharges, remote-area fees, and the levers that actually cut your bill.
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