A courier does not simply weigh your parcel and look up a price. It also measures the box, works out a “volumetric” weight, picks whichever weight is higher, rounds it up, and then adds charges for the route, payment mode, fuel and tax. If you understand each step, you can predict your bill and spot where you are paying for air.
This guide walks through the volumetric weight formula, chargeable weight, weight slabs and every other part of a typical Indian courier charge, with worked examples.
Dead weight, volumetric weight and chargeable weight
Three weights matter on every shipment.
- Dead weight (actual weight): what the packed parcel weighs on a scale, including the box, tape and filler.
- Volumetric weight (also called dimensional or volume weight): a weight worked out from the size of the box. It reflects how much space the parcel takes up in a vehicle or aircraft.
- Chargeable weight: the weight you are actually billed on.
Light but bulky parcels take up space that could carry heavier goods. So couriers bill on whichever is higher. At the time of writing (October 2026), Delhivery’s help centre states it plainly for its Surface and Express services: chargeable weight = max(dead weight, L × B × H ÷ 5000). Blue Dart’s published terms also say shipments are charged on chargeable weight, not actual weight.
A pillow in a large carton may weigh 800 g but have a volumetric weight of several kilograms. A small box of metal parts may be the opposite. You pay on the bigger number.
The volumetric weight formula
The formula is:
Volumetric weight (kg) = Length (cm) × Breadth (cm) × Height (cm) ÷ divisor
Follow these steps:
- Pack the item exactly as it will ship.
- Measure the outside of the box at its longest, widest and tallest points, in centimetres. Include any bulge.
- Multiply the three measurements to get the volume in cubic centimetres.
- Divide by your courier’s divisor.
Which divisor do Indian couriers use?
The divisor is not universal, so check your own rate card. Here is what official sources showed when we checked in October 2026:
| Source | What it says |
|---|---|
| Delhivery help centre | Surface and Express: L × B × H ÷ 5000 |
| Blue Dart terms (Dart Apex and Domestic Priority) | Length × Width × Height in cm ÷ 5000 |
| Blue Dart terms (Surface / P2P) | Uses cubic feet instead: 1 cubic foot = 10 kg |
| Amazon Shipping India invoice guide | 5000 is the most common domestic divisor; some couriers use 4000 for select domestic categories |
Two practical points follow from this:
- A smaller divisor means a higher volumetric weight. The same 9,000 cm³ box is 1.8 kg at a divisor of 5000 but 2.25 kg at 4000.
- Air and international services often use other divisors. Check your courier’s terms for each service you book rather than assuming one number applies everywhere.
Some couriers also treat certain packaging differently. For example, Delhivery’s help centre says flyer-packed shipments are charged on dead weight only, up to 1 kg.
Rounding up to weight slabs
Couriers rarely bill to the gram. They price in weight slabs, and chargeable weight is rounded up to the next slab. Blue Dart’s terms, for instance, describe rounding the weight “to the next higher half kg. or one kg as per the rate category agreed to”. Delhivery’s rate card assigns each shipment to a weight slab based on chargeable weight.
Rate cards are often written as a price for the first slab plus a price for each additional slab. Check how yours is laid out.
Example (0.5 kg slabs): a parcel with a chargeable weight of 1.1 kg is billed as 1.5 kg. A parcel at 1.5 kg stays at 1.5 kg. A parcel at 1.51 kg moves to 2.0 kg.
This is why a few millimetres on a box, or a few grams of extra packing, can push a parcel into the next slab.
The other parts of a courier charge
Chargeable weight sets the base freight. Several other items are then added. Not every courier uses every item, and names vary, so read your own rate card.
1. Zone (pickup and delivery pincodes)
Your price per slab depends on the distance and type of route. Delhivery’s rate card says a zone is assigned based on the origin and destination pincodes. Its zones run from local and regional routes through metro and rest-of-India routes to special regions. Other couriers use similar groups under their own names. Use the pincode serviceability checker to confirm a courier delivers to a pincode before you quote a price.
2. Shipping mode
Surface (road) and express or air services are priced separately. Delhivery’s rate card uses transport mode as one of the factors that decides which price row applies.
3. COD charge
Cash-on-delivery orders carry an extra charge for cash handling. Delhivery’s rate card lists it under overhead charges. Amazon Shipping India’s invoice guide describes the COD fee as billed as a flat fee or a percentage of order value, whichever is higher. Prepaid orders do not carry this charge.
4. Fuel surcharge
Many couriers add a fuel surcharge as a percentage, revised over time. Blue Dart, for example, publishes its domestic fuel surcharge on its website with a new figure effective from the first of each month. Delhivery’s rate card notes that its destination city surcharge is exclusive of fuel surcharge. Ask your courier or platform whether the rates you see already include fuel.
5. Remote area, ODA and city surcharges
Some destinations cost more to serve. Couriers may add an out-of-delivery-area (ODA) or remote area charge, or a city-specific surcharge. Delhivery’s rate card, for example, describes a destination city surcharge for select cities, applied on top of standard zone rates for forward, RTO and return shipments.
6. RTO charges
If a parcel cannot be delivered and returns to you (return to origin, or RTO), you usually pay for the return trip too. Delhivery’s rate calculator shows RTO cost as well as forward cost. Amazon Shipping India’s invoice guide describes RTO as the reverse freight cost of bringing the parcel back. See our guide on NDR and RTO for ways to cut returns.
7. GST
Courier services fall under GST heading 9968 (“Postal and courier services”). The GST Council’s published services rate schedule lists this heading at 9% CGST plus 9% SGST, or 18% IGST. So GST is currently 18% on most courier services. If you are GST-registered, you may be able to claim input tax credit on it. Confirm the treatment for your business with your CA.
Three worked examples
The examples below use a made-up rate card to show the maths. These are not real courier rates and not Courier Tales rates.
Example rate card (hypothetical): ₹40 per 0.5 kg slab within state, ₹60 per 0.5 kg slab for rest of India. Fuel surcharge 10% of freight. COD charge ₹40 flat. GST 18% on the total. Divisor 5000.
| Example A | Example B | Example C | |
|---|---|---|---|
| Box (cm) | 30 × 20 × 15 | 20 × 15 × 10 | 40 × 30 × 30 |
| Volume (cm³) | 9,000 | 3,000 | 36,000 |
| Volumetric weight | 1.8 kg | 0.6 kg | 7.2 kg |
| Dead weight | 1.2 kg | 1.4 kg | 3.0 kg |
| Chargeable weight | 1.8 kg | 1.4 kg | 7.2 kg |
| Rounded to 0.5 kg slab | 2.0 kg (4 slabs) | 1.5 kg (3 slabs) | 7.5 kg (15 slabs) |
| Zone | Within state | Rest of India | Rest of India |
| Payment | Prepaid | COD | Prepaid |
| Freight | ₹160 | ₹180 | ₹900 |
| Fuel surcharge (10%) | ₹16 | ₹18 | ₹90 |
| COD charge | ₹0 | ₹40 | ₹0 |
| Subtotal | ₹176 | ₹238 | ₹990 |
| GST (18%) | ₹31.68 | ₹42.84 | ₹178.20 |
| Total | ₹207.68 | ₹280.84 | ₹1,168.20 |
What the examples show:
- Example A is billed on volumetric weight. The box is bigger than the product needs.
- Example B is billed on dead weight. The parcel is small and dense, so the box size does not matter.
- Example C is a light, bulky item. It weighs 3 kg but is billed as 7.5 kg.
Real rate cards differ in how they order these items. Some apply the fuel surcharge to COD as well, and some include fuel in the slab price. The structure, though, is usually the same.
How to reduce chargeable weight
You cannot change the zone or GST, but you can control the box.
- Right-size the carton. In Example C, cutting the height from 30 cm to 20 cm drops the volume to 24,000 cm³. That gives a volumetric weight of 4.8 kg, billed as 5.0 kg instead of 7.5 kg: five fewer slabs.
- Keep a few standard box sizes. Match each product to the smallest box that protects it. Record the packed dimensions against each SKU so they are entered correctly every time.
- Use flyers or poly mailers for soft goods. Clothing and other non-fragile items often do not need a box. Check how your courier charges flyer-packed shipments.
- Cut excess filler. Use only as much cushioning as the product needs. Too much filler pushes boxes into bigger sizes.
- Avoid bulging. An overfilled box measures larger than its stated size. Couriers measure the actual parcel.
- Combine items carefully. Two items in one well-fitted box can cost less than two boxes. One oversized box can cost more.
- Watch slab edges. If a parcel sits just over a slab (say 1.55 kg on 0.5 kg slabs), a lighter box or less filler may bring it down a whole slab.
- Declare accurate weights and dimensions. If your declared figures are lower than what the courier measures, you can face a weight dispute and extra charges. Our guide on courier weight disputes explains how to keep evidence.
For a wider look at cutting costs, see e-commerce shipping.
Shipping charge checklist
- Weighed the parcel fully packed, on a calibrated scale
- Measured outer L, B and H in cm, including any bulge
- Confirmed the divisor for this courier and service
- Worked out volumetric weight and took the higher of the two weights
- Rounded up to the courier’s weight slab
- Checked the zone from the pickup and delivery pincodes
- Added COD charge for COD orders
- Checked whether fuel surcharge is included or extra
- Checked for remote area, ODA or city surcharges
- Allowed for possible RTO cost on risky orders
- Added GST at the current rate
- Saved packed dimensions against each SKU
How chargeable weight works in Courier Tales
Courier Tales is a shipping platform for Indian online sellers. It works out chargeable weight as the higher of actual weight and volumetric weight (L × B × H in cm ÷ 5000), rounded up to the courier’s slab. Charges vary by zone: within city, within state, within cluster, metro to metro, special location and rest of India. A COD charge applies to COD orders, and GST at 18% is added. Before booking, you can compare serviceable couriers with estimated charges for each order. If a courier reports a weight discrepancy, it appears in your dashboard and you have 48 hours to respond with evidence.
To see an indicative charge for your own parcel, try the shipping rate calculator.
Frequently asked questions
What is the volumetric weight formula for courier shipments in India?
Multiply length × breadth × height in centimetres and divide by the courier's divisor. Delhivery's and Blue Dart's published domestic terms use 5000, but always check the divisor in your own courier's rate card.
What is chargeable weight?
It is the weight you are billed on: the higher of the parcel's actual (dead) weight and its volumetric weight, usually rounded up to the courier's next weight slab.
Is GST charged on courier charges?
Yes. Courier services fall under GST heading 9968 and are currently taxed at 18% in the GST Council's published rate schedule. Confirm the treatment for your business with your CA.
How can I lower my chargeable weight?
Use the smallest box that protects the product, avoid oversized cartons and loose filler, and use flyers or poly mailers for soft, non-fragile items where your courier allows it.
Sources
- Calculating Volumetric Weight, Delhivery One Help Center (accessed 19 October 2026)
- Rate Card, Delhivery One Help Center (accessed 19 October 2026)
- Rate Calculator, Delhivery One Help Center (accessed 19 October 2026)
- Terms and Conditions, Blue Dart Express (accessed 19 October 2026)
- Fuel Surcharge, Blue Dart Express (accessed 19 October 2026)
- How to Read and Understand Your Courier Invoice: A Guide for Indian SMBs, Amazon Shipping India (accessed 19 October 2026)
- GST rates for services (compiled schedule), GST Council (accessed 19 October 2026)
Courier, marketplace and tax rules change. Check the current terms with your courier, marketplace or adviser before relying on them.