Volumetric Weight vs Dead Weight: How Couriers Really Calculate Shipping Charges in India (2026)

Aditi packs a 600 gram skincare gift box in a roomy carton and books it at 1 kg. The courier scans it at the hub and bills her for 3 kg. That is a ₹160 surprise on one parcel, and it repeats on every order shipped in that box. At 1,000 orders a month, she is paying ₹1.6 lakh for empty space.

If that sounds familiar, you are not being cheated. You are being billed on volumetric weight. Let’s look at how it works and how to stop paying for air.

Quick answer: Indian couriers charge you on whichever is higher, dead weight or volumetric weight. For most domestic shipments, volumetric weight in kg equals Length × Breadth × Height in cm ÷ 5000. A volumetric weight calculator does this maths in seconds, so run it before you book.

What is the difference between volumetric weight and dead weight?

Dead weight is what your packed parcel shows on a weighing scale. Volumetric weight, also called dimensional weight, is the weight a courier assigns based on the space your box occupies in a vehicle.

Why does this exist? A truck fills up by space long before it reaches its weight limit. A box of cushions and a box of books take similar room, but only one is heavy. Understanding dead weight vs volumetric weight is the first step to controlling your freight bill.

Here is the simple pattern:

• Dense items like books, tools and supplements usually bill on dead weight.
• Light and bulky items like apparel, toys and home décor usually bill on volumetric weight.

How is volumetric weight calculated in India?

Here is the volumetric weight formula, step by step:

1. Measure the packed box in centimetres. Use the outer box, not the product.
2. Multiply Length × Breadth × Height.
3. Divide the result by 5000, or by your courier’s volumetric divisor.
4. Weigh the packed box.
5. Compare the two numbers. The higher one is your chargeable weight.

Example 1, volumetric wins. Aditi’s box is 30 × 25 × 20 cm. That is 15,000 ÷ 5000 = 3 kg. Dead weight is 0.6 kg. Chargeable weight is 3 kg.

Example 2, dead weight wins. Ravi ships a 4 kg protein tub in a 20 × 20 × 20 cm box. That is 8,000 ÷ 5000 = 1.6 kg. Dead weight is higher, so he pays for 4 kg.

If you have dozens of SKUs, use a volumetric weight calculator to save time. Do the volumetric weight calculation once per box size and keep the results in a sheet.

Which weight do couriers actually charge you for?

The higher one, rounded up to the next courier weight slab. Slabs move in fixed steps, such as 250 g or 500 g. Shipway’s lowest weight slab starts at 250 g.

So a parcel at 3.01 kg is billed as 3.5 kg on a 500 g slab. Small overshoots cost real money.

Couriers also remeasure your parcel at their sorting hub. Most allow a tolerance of roughly 50 to 100 grams between your declared weight and their recorded weight before it becomes billable.

Do all couriers in India use the same volumetric divisor?

For most domestic shipments, yes. The divisor is courier specific, but it is usually 5000 for domestic parcels in India. Heavy cargo, air services and custom contracts can specify a different one.

A lower divisor means a higher volumetric weight. Take Aditi’s 30 × 25 × 20 cm box. At 5000 it bills as 3 kg. If your contract says 4000, the same box bills as 3.75 kg. Always confirm the volumetric divisor in your rate card before you assume 5000.

How much can volumetric weight cost your brand in rupees?

Let’s use an illustrative rate of ₹40 per 500 g slab.

• Original box (30 × 25 × 20 cm): 3 kg is 6 slabs, which costs ₹240.
• Resized box (20 × 15 × 10 cm): 3,000 ÷ 5000 = 0.6 kg. Dead weight is also 0.6 kg, so it bills as 1 kg, which is 2 slabs and costs ₹80.

That is ₹160 saved per order. At 1,000 orders a month, it adds up to ₹1,60,000. The product did not change. Only the air around it did.

What is the 200 gram per litre rule?

Here is a quick check that needs no calculator. 5,000 cm³ equals 5 litres, and at a divisor of 5000, 5 litres bills as 1 kg. So any parcel lighter than 200 grams per litre of box volume is billed on volumetric weight.

A 40 × 25 × 20 cm box is 20 litres. Unless it weighs more than 4 kg, you are paying for space. If your courier uses 4000, the line moves to 250 grams per litre.

How can you reduce volumetric weight without risking damage?

• Standardise 3 to 4 box sizes and map every SKU to one of them.
• Use poly mailers for soft goods like apparel.
• Cut dead space, not protection. Fillers should close gaps, not add extra layers.
• Measure after taping. Tape, bulges and corners add centimetres.
• Test new SKUs with five sample parcels before launch.

Smaller boxes also mean fewer damage claims when the fit is snug and the cushioning is right.

Why is my courier charging more than the actual weight?

Because the courier billed volumetric weight, or measured different dimensions at the hub. Check your declared dimensions first. Then look at the courier’s recorded weight and dimensions.

If you still disagree, raise a dispute quickly. Shipway’s guide suggests submitting weight disputes through the dashboard within 7 days. For the full process, read our weight discrepancy dispute guide.

Prevention beats disputes. Shipway’s ShipSense AI picks the best courier for each order, so you are not manually comparing rates for every parcel. Shipway also reports that one brand, Awshad, cut weight discrepancy issues from 9% to 5%.

Key Takeaways

• Couriers bill the higher of dead weight and volumetric weight.
• The formula is Length × Breadth × Height in cm ÷ 5000 for most domestic parcels.
• Chargeable weight is rounded up to the next slab.
• Parcels under 200 grams per litre bill on volumetric weight at a divisor of 5000.
• Confirm your divisor in your rate card, since contracts can differ.
• Smaller, snug packaging is the fastest saving you can make.