How do I calculate volumetric weight?

Volumetric weight (kg) = Length × Width × Height in cm ÷ 5,000 for most couriers, or ÷ 6,000 for air cargo. You are charged on the higher of volumetric and actual weight.

What divisor do Indian couriers use?

Most Indian couriers and aggregators such as Delhivery, Blue Dart, DTDC and Shiprocket use 5,000 for air and express. Some surface services use 4,000 or 4,500. Check your rate card.

How can I reduce volumetric weight?

Use the smallest box that fits, avoid extra void fill, use poly mailers for soft goods, and ship flat-packed where possible.

Volumetric Weight Calculator — Courier & Air Chargeable Weight

Volumetric weight formula

Volumetric weight (kg) = L × W × H (cm) ÷ divisor Chargeable weight = higher of (actual weight, volumetric weight) Then rounded up to the courier's slab, usually 0.5 kg

Example: a 40 × 30 × 20 cm box weighing 3 kg has a volumetric weight of 24,000 ÷ 5,000 = 4.8 kg. You pay for 5 kg, not 3.

Divisors used by common carriers

Carrier / service	Typical divisor
Delhivery, Blue Dart, DTDC, Ecom Express (air/express)	5,000
Shiprocket, NimbusPost, other aggregators	5,000
DHL, FedEx, UPS international express	5,000
Air cargo (IATA)	6,000
Some surface / road services	4,000–4,500

Divisors can change and vary by contract. Always check your current rate card.

Frequently asked questions

Why is my courier charging more than the actual weight?

Light but bulky parcels take up space in the vehicle or aircraft, so carriers charge on volume. If your box is too big for its contents, you pay for air.

Does Amazon or Flipkart use volumetric weight?

Yes. Marketplace shipping fees use the higher of actual and volumetric weight (usually ÷5000), so packaging size directly affects your fees.

How do I measure a parcel?

Measure the longest side as length, then width and height, at the widest points including any bulges. Round each up to the next whole centimetre.