Dimensional Weight Calculator

FAQs

What is dimensional weight?

Dimensional weight is a pricing method carriers use to account for package size in addition to actual weight.

How do I avoid overpaying for shipping?

Use custom-sized packaging and avoid bulky boxes to reduce dimensional weight.

What is the formula for dimensional weight?

Dimensional weight is calculated as:

(Length × Width × Height) ÷ Dim Divisor

For most express carriers like DHL, FedEx, or UPS, the divisor is 139 for inches or 5000 for centimetres.

What’s the difference between actual weight and dimensional weight?

• Actual weight is the package’s weight as measured on a scale.
• Dimensional weight reflects how much space it takes up in transit.
• Carriers bill whichever is higher.

When do carriers use dimensional weight pricing?

Dimensional weight is typically used for air, express, and international shipments—especially for lightweight items in large boxes. It ensures fair space usage pricing.

Does BlindShip use dimensional weight for all shipments?

Yes, for express shipments (FedEx, DHL, UPS) from our Shenzhen depot, dimensional weight is used to calculate the billable rate. For sea freight, actual weight and volume (CBM) matter more.

How can I reduce my dimensional weight charges?

• Use tighter packaging that fits your product.
• Avoid oversized outer boxes.
• If possible, ask your supplier to use flat-pack or vacuum-pack methods.

Is the calculator result the final billed weight?

It’s an estimate. The final billed weight may vary slightly after carrier measurement. BlindShip always uses the carrier-verified weight for invoicing.

What is the difference between chargeable weight and dimensional weight?

Chargeable weight is the greater of actual weight or dimensional weight. If your shipment weighs 2kg but has a dim weight of 4kg, you’ll be charged for 4kg.

What is the dimensional weight divisor for FedEx, DHL, and UPS?

• FedEx and UPS: 139 for inches (or 5000 for cm)
• DHL: 139 for inches, but may vary by service level

Always check your carrier’s current dim divisor to avoid surprises.

Does dimensional weight apply to sea freight?

No. Sea freight is typically charged based on volume (CBM) or actual weight, not dimensional weight. BlindShip applies dimensional rules only for express/air services.

Why is dimensional weight higher than actual weight?

Dimensional weight considers the space a shipment takes up, not just its scale weight. Large, lightweight packages (like pillows or apparel) are often charged by dimensional weight to prevent inefficiencies in carrier space.

How does BlindShip calculate dimensional weight?

We use standard carrier formulas:

• Inches: (Length × Width × Height) ÷ 139
• Centimeters: (Length × Width × Height) ÷ 5000

Use our calculator above for a fast estimate before shipping or quoting.