A loaded air-cargo pallet may weigh 760 kilograms, yet the airline may bill it at 1,000 kilograms. No cargo has been added. The extra 240 kilograms come from a pricing floor called pivot weight.
Pivot weight and chargeable weight are linked, but they are not the same figure. Pivot weight is a preset minimum tied to a Unit Load Device rate. Chargeable weight is the billing weight applied to the shipment. For loose cargo, chargeable weight usually comes from a comparison of gross weight and volumetric weight. For a ULD booking, the pivot weight may set the lowest billable amount.
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What Is Pivot Weight in Air Freight?
Pivot weight is a preset weight attached to a ULD rate. A ULD, or Unit Load Device, may be an aircraft container or an aircraft pallet fitted with a net.
Under many ULD pricing agreements, the pivot weight acts as the minimum chargeable weight for that ULD. The carrier may charge the pivot amount even when the cargo placed inside the container or on the pallet has a lower billing weight.
Think of pivot weight as the floor under the ULD price. The cargo can stand above that floor, but it normally cannot push the billed amount below it.
The pivot weight is not calculated from the dimensions of the shipment each time. It is normally stated in the carrier tariff, rate sheet, booking record, contract, or ULD pricing table. It can differ by:
- ULD code and size
- Aircraft position
- Carrier
- Route
- Rate agreement
- Product type
- Origin and destination
A pallet rate may carry a pivot weight of 1,000 kilograms, while another container rate may carry a different figure. Never copy a pivot weight from an old booking without reading the terms for the new movement.
What Is Chargeable Weight?
Chargeable weight is the weight used to set the freight amount. It may come from physical weight, cargo volume, a minimum ULD weight, or a stated rating rule.
For loose air freight, the common starting calculation is:
Chargeable weight = the higher of gross weight or volumetric weight
Gross weight is the physical weight of the packed cargo. It includes the goods, cartons, crates, pallets, wrap, padding, straps, and other packing material handed to the carrier.
Volumetric weight converts occupied cargo space into a billing weight. With dimensions measured in centimetres, a common air-cargo formula is:
Volumetric weight in kg = length × width × height ÷ 6,000
The scale sets one candidate. The measuring tape sets the other. The higher candidate becomes the normal cargo-based chargeable weight.
A ULD pivot rate adds another step. The cargo-based figure must be compared with the stated pivot weight under the carrier’s rating terms.
Pivot Weight vs Chargeable Weight at a Glance
| Term | Meaning | How It Is Found | Role in Pricing |
|---|---|---|---|
| Gross weight | Physical weight of the packed cargo | Measured on a scale | One candidate for normal chargeable weight |
| Volumetric weight | Weight based on occupied cargo space | Calculated from outer dimensions | One candidate for normal chargeable weight |
| Pivot weight | Preset minimum tied to a ULD rate | Read from the tariff, quote, or contract | Creates the ULD billing floor |
| Chargeable weight | Weight used to price the shipment | Set under the applicable rating rules | Controls the freight amount |
How Pivot Weight and Chargeable Weight Work Together
Start by finding the cargo-based chargeable weight. Compare gross weight with volumetric weight. Next, compare that result with the pivot weight stated for the ULD.
A simple working method is:
Cargo-based chargeable weight = higher of gross weight or volumetric weight
ULD-rated weight = higher of cargo-based chargeable weight or pivot weight
This method assumes that the booking has no separate tare allowance, density adjustment, flat-charge rule, or special contract term. The airline’s rate record always takes priority over a general example.
When the cargo-based weight falls below the pivot, the pivot weight sets the minimum. When it rises above the pivot, the kilos above the pivot may receive an over-pivot rate.
Over-pivot weight = cargo-based chargeable weight − pivot weight
If the result is negative, the over-pivot weight is zero.
Example 1: Chargeable Weight Is Below Pivot Weight
Assume a shipper books one ULD with these figures:
- Gross cargo weight: 760 kg
- Volumetric weight: 900 kg
- Pivot weight: 1,000 kg
Compare gross and volumetric weight:
Higher of 760 kg and 900 kg = 900 kg
The cargo-based chargeable weight is 900 kilograms. It remains 100 kilograms below the ULD pivot.
ULD-rated weight = 1,000 kg
The carrier applies the pivot charge because the ULD booking carries a 1,000-kilogram minimum. The shipper does not receive a lower base price merely because the cargo-based figure is 900 kilograms.
This is the main difference between loose-cargo rating and pivot rating. A loose shipment might be billed at 900 kilograms. The booked ULD is billed from its 1,000-kilogram floor.
Example 2: Chargeable Weight Is Above Pivot Weight
Now use these figures:
- Gross cargo weight: 1,180 kg
- Volumetric weight: 1,050 kg
- Pivot weight: 1,000 kg
The gross weight is higher than the volumetric weight:
Cargo-based chargeable weight = 1,180 kg
Find the amount above the pivot:
1,180 kg − 1,000 kg = 180 kg over pivot
The first 1,000 kilograms fall under the pivot charge. The remaining 180 kilograms may be priced at the stated over-pivot rate.
Do not add the full 1,180 kilograms to the 1,000-kilogram pivot. That would count the base portion twice. Only the 180 kilograms above the pivot belong on the excess line.
Example 3: Calculating the ULD Freight Amount
Assume the booking contains these rates:
- Pivot weight: 1,000 kg
- Pivot charge: $2,400
- Over-pivot rate: $1.20 per kg
- Cargo-based chargeable weight: 1,180 kg
Find the excess weight:
1,180 kg − 1,000 kg = 180 kg
Calculate the excess charge:
180 kg × $1.20 = $216
Add the excess charge to the pivot charge:
$2,400 + $216 = $2,616
The air freight amount is $2,616 before fuel, security, terminal, screening, pickup, delivery, tax, customs, storage, or other booking fees.
Example 4: Volumetric Weight Creates an Over-Pivot Charge
Pivot calculations are not controlled by gross weight alone. A light but large ULD load may cross the pivot because of volume.
Assume the cargo has these figures:
- Gross weight: 850 kg
- Total volume: 7.2 CBM
- Pivot weight: 1,000 kg
Under a 6,000 divisor, one cubic metre is about 166.67 kilograms of volumetric weight.
7.2 CBM × 166.67 = 1,200.02 kg
The volumetric weight is about 1,200 kilograms. It is higher than the 850-kilogram gross weight.
Cargo-based chargeable weight = 1,200 kg
Over-pivot weight = 1,200 kg − 1,000 kg = 200 kg
The shipment crosses the pivot even though the scale shows only 850 kilograms. The cargo fills enough room to produce a 1,200-kilogram space-based figure.
Pivot Weight Is Not Maximum Gross Weight
Pivot weight is a commercial rating figure. Maximum gross weight is an operating and safety limit.
A ULD may have a pivot weight of 1,000 kilograms and a permitted maximum gross weight far above that figure. The 1,000-kilogram pivot does not mean loading must stop at 1,000 kilograms. It means the basic ULD charge is tied to that billing threshold.
The permitted maximum depends on the ULD, aircraft, route, loading position, floor limits, contour, restraint system, and carrier rules. Never use pivot weight as a loading limit.
The difference can be stated in plain terms:
Pivot weight controls price.
Maximum gross weight controls how much the ULD may carry.
Pivot Weight Is Not Tare Weight
Tare weight is the empty weight of the ULD. A container, pallet, and net have their own physical mass before goods are loaded.
Pivot weight is a billing threshold. Tare weight is a scale weight. They answer two separate questions.
| Weight Type | Question Answered |
|---|---|
| Tare weight | How much does the empty ULD weigh? |
| Gross loaded weight | How much does the loaded ULD weigh? |
| Pivot weight | What minimum weight is tied to the ULD rate? |
| Chargeable weight | What weight will be used for the freight bill? |
Some ULD agreements include a tare allowance or a separate tare entry. Read the booking terms before subtracting any empty-container weight. An unapproved tare deduction can produce a quote that is too low.
Loose Cargo Rating vs ULD Pivot Rating
Loose cargo and built-up ULD cargo may travel on the same aircraft, but their rate methods can differ.
Loose cargo
The carrier normally compares gross weight and volumetric weight. The higher figure becomes chargeable weight, subject to minimum charges and rate bands.
ULD or BUP cargo
The carrier may apply a pivot charge for each booked ULD. The pivot becomes the minimum chargeable weight. Weight above that point may receive a separate over-pivot rate.
BUP commonly refers to a built-up pallet or container supplied to the carrier in a ready-for-carriage state under the agreed terms. The exact acceptance and build rules depend on the airline.
A shipper should not assume that a loose-cargo per-kilogram rate can be used for a shipper-built ULD. The quote must name the correct booking type.
How Pivot and Over-Pivot Weight Appear on Air-Cargo Records
ULD rating entries may use separate codes for the pivot portion and the excess portion.
- U: ULD basic charge or pivot entry
- E: ULD excess or over-pivot entry
- X: ULD-related data, which may include tare information
A booking with a 1,000-kilogram pivot and 180 kilograms above pivot may show the base entry on one line and the 180-kilogram excess on another. This split lets the carrier apply one charge to the pivot amount and another rate to the excess.
The total on the air waybill may look different from a normal weight multiplied by one rate. That is expected when a fixed pivot charge and a separate over-pivot rate apply.
How to Calculate Pivot-Based Chargeable Weight Step by Step
- Read the ULD rate terms. Record the ULD code, pivot weight, pivot charge, over-pivot rate, and any tare rule.
- Weigh the cargo. Use the packed gross weight required by the booking terms.
- Measure the cargo. Record the greatest outer dimensions of each piece or built unit.
- Find volumetric weight. Apply the divisor named in the rate agreement.
- Set the cargo-based weight. Compare gross and volumetric weight.
- Compare with the pivot. Use the pivot as the minimum for the ULD when the tariff says it applies.
- Find the excess. Subtract pivot weight from the higher cargo-based figure.
- Price the booking. Add the pivot charge and any over-pivot charge.
- Review added fees. Fuel, security, handling, screening, and terminal fees may use their own bases.
Common Pivot Weight Errors
Adding pivot weight to the full chargeable weight
The pivot is not an extra block placed on top of the entire shipment weight. When the shipment exceeds the pivot, subtract the pivot first. Price only the remaining kilos at the over-pivot rate.
Treating pivot weight as actual weight
A scale does not measure pivot weight. The carrier or contract states it.
Using the pivot as a loading limit
The pivot controls the commercial rate. Maximum permitted gross weight controls the loading ceiling.
Ignoring volumetric weight
Large, light cargo may pass the pivot through its volumetric figure even when its physical weight remains below the pivot.
Subtracting tare without permission
A tare allowance must come from the applicable terms. Do not invent a deduction from the empty pallet or container weight.
Applying one pivot to several ULDs
A booking with three ULDs may carry three separate pivot minimums. The exact treatment rests on the carrier agreement. Read the rate per ULD rather than treating the entire booking as one large container.
Using a pivot from another route
Pivot weights and charges can differ between airlines, routes, ULD types, and contracts. The figure from a previous airway bill may not apply.
Multiple ULD Example
Assume a booking contains two ULDs. Each one has a 1,000-kilogram pivot.
| ULD | Cargo-Based Weight | Pivot Weight | Rated Weight | Over Pivot |
|---|---|---|---|---|
| ULD 1 | 850 kg | 1,000 kg | 1,000 kg | 0 kg |
| ULD 2 | 1,275 kg | 1,000 kg | 1,275 kg | 275 kg |
ULD 1 is billed at its pivot because its cargo-based weight is lower. ULD 2 is above pivot, so 275 kilograms receive the over-pivot treatment.
Total rated weight = 1,000 kg + 1,275 kg = 2,275 kg
Total over-pivot weight = 275 kg
Do not average the two units unless the carrier agreement expressly permits that method. One underweight ULD may not cancel weight above the pivot on another ULD.
Can Better Packing Reduce an Over-Pivot Charge?
Yes, when volumetric weight controls the cargo-based figure. Lowering the outer volume may bring the load closer to the pivot or below it.
Keep cartons within the pallet footprint. Remove overhang. Lower the stack when a safer arrangement allows it. Use cartons that fit the goods closely. Replace large empty gaps with a tighter pack.
A smaller cargo outline can cut volumetric weight, but it cannot lower the ULD bill beneath the pivot minimum. Once the load falls below pivot, further volume cuts may not reduce the base ULD charge.
This creates a practical stopping point. Cutting a ULD load from 1,150 to 1,020 chargeable kilograms can reduce over-pivot fees. Cutting it from 980 to 850 kilograms may leave the same pivot charge in place.
Pivot Weight vs Chargeable Weight FAQ
Is pivot weight always the same as chargeable weight?
No. Pivot weight is a preset ULD minimum. Chargeable weight may equal the pivot, fall above it, or come from another rate method when no pivot rule applies.
Can chargeable weight be lower than pivot weight?
The cargo-based calculation can be lower. Under a ULD rate that sets pivot as the minimum chargeable weight, the billed ULD amount will not fall below the pivot.
Does every air shipment have a pivot weight?
No. Pivot weight normally belongs to ULD or built-up unit pricing. Loose cargo commonly uses gross and volumetric weight without a ULD pivot.
Who sets the pivot weight?
The airline or rate agreement sets it. It may appear in a carrier tariff, booking quote, contract, or ULD rate table.
What is an over-pivot rate?
It is the rate charged for weight above the stated pivot. The carrier may apply a fixed pivot charge to the base amount and a per-kilogram rate to the excess.
Is pivot weight the same as break weight?
No. A normal rate break is a weight band that may lower the price per kilogram. Pivot weight is tied to a ULD pricing method and acts as a minimum for that unit.
Does the ULD tare count?
Tare treatment depends on the carrier’s terms. Some bookings include a tare allowance or a separate ULD tare entry. Use only the deduction stated in the booking record.
A Final Working Rule
Chargeable weight is the figure used for the freight bill. Pivot weight is the minimum billing threshold tied to a ULD rate.
For loose cargo, compare gross weight with volumetric weight. For pivot-rated ULD cargo, compare that cargo-based result with the pivot stated in the quote. When the result stays below pivot, the pivot charge applies. When it rises above pivot, price the excess with the over-pivot rate.
Cargo-based weight = higher of gross or volumetric weight
ULD-rated weight = at least the stated pivot weight
Over-pivot weight = cargo-based weight − pivot weight
ULD freight amount = pivot charge + over-pivot charge
The key is to keep four figures separate: gross weight, volumetric weight, pivot weight, and maximum ULD weight. One comes from the scale, one comes from cargo size, one comes from the rate, and one comes from operating limits. Mix them together and the quote can drift badly. Keep them in their own lanes and the invoice becomes much easier to read.
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