Volumetric Weight Explained: How Couriers Calculate Your Shipping Charge

Couriers charge on whichever is higher: the actual weight of your parcel or its volumetric (dimensional) weight. Light but bulky parcels often cost more than sellers expect.

The formula

Volumetric weight (kg) = Length × Width × Height (in cm) ÷ 5000 for most domestic express couriers. Some surface services and international shipments use a different divisor, so always check the courier's rule.

Example: a 30 × 25 × 20 cm box = 15,000 ÷ 5000 = 3 kg volumetric weight, even if it weighs only 1 kg.

Tips to pay less

• Use the smallest box that protects the product.
• Prefer poly mailers for soft goods.
• Measure the packed box, not the product.
• Enter accurate dimensions when booking to avoid weight disputes.
• Keep photos of the packed parcel on the scale with a tape measure.

Try ShipPilot's free volumetric weight calculator to check any box before you ship.