Revenue Ton (RT) — Charging Unit for LCL Freight and CFS Charges
Interlink編集部What is RT (Revenue Ton)?
RT (Revenue Ton) is a billing unit used in maritime transport, especially when calculating freight charges and CFS Charges for LCL cargo. The concept of Revenue Ton is to determine charges based on whichever is greater: the cargo’s weight or volume.
In practice, RT is sometimes denoted as Revenue Ton, Freight Ton, Measurement Ton, W/M, Weight or Measurement, or similar expressions.
When understanding RT, it is important not just to remember the phrase “whichever is greater, weight or volume,” but also to confirm practical details such as how many CBM or kilograms define 1 RT, whether calculations use external dimensions after packing, whether Gross Weight is used, whether there is a minimum charge, and whether RT is applied not only to Ocean Freight but also to CFS Charges and surcharges.
Scope of this Article
This article organizes RT as a fundamental billing unit for cost calculation of LCL cargo. It focuses on differences between FCL and LCL, weight dominance and volume dominance, definitions of 1 RT, minimum charges, the relationship with CFS Charges, and special considerations for unusual cargo.
| Item | Covered in this article | Handled in separate articles / separate checks |
|---|---|---|
| Basics of RT | Explains the concept where the billing unit is based on whichever is greater: weight or volume. | Detailed conversion criteria per company tariff need to be checked in individual quotation conditions. |
| LCL Charges | Explains why RT is important for LCL cargo, and its relation to Ocean Freight and CFS Charges. | Details on overall LCL charge structure and local charges on export and import sides require separate verification. |
| FCL Charges | Explains that in FCL, freight is usually calculated per container unit rather than RT. | Detailed treatment of FCL Ocean Freight, THC, drayage, Demurrage and Detention is handled in separate articles. |
| CFS Charge | Explains that CFS Charges may sometimes be calculated per RT. | Details of CFS operations and additional charges for dangerous goods, long items and heavy cargo require individual confirmation. |
| Numerical calculations | Explains typical calculation methods such as the larger of 1 CBM or 1,000 kg, and the 1.133 CBM standard. | Actual billed amounts vary depending on quotation, tariffs, minimum charges, surcharges and local charges. |
| Freight forwarder practice | Organizes points to confirm, precautions, and common misunderstandings when explaining RT calculation to shippers. | Final cost responsibility and billing terms are determined by quotation conditions, contracts and agreements specific to each case. |
Major Differences Between FCL and LCL
RT is primarily an important concept for LCL cargo. In FCL, freight is structured per container unit such as 20FT, 40FT or 40HQ containers. Since a whole container is used regardless of how full it is, freight is basically based on the container unit.
On the other hand, LCL consolidates shipments from multiple shippers into a single container. Therefore, charges need to be allocated according to the weight or volume of each shipment. This allocation uses RT.
Without understanding this difference, one might mistakenly evaluate LCL estimates with an FCL mindset, resulting in impressions such as “the cost is high despite the small cargo quantity” or “the freight is expensive despite the light actual weight.” For LCL, it is necessary to consider the space occupied by cargo, handling volume at the CFS, minimum charges and local charges as well.
| Checkpoint | FCL | LCL | Practical notes |
|---|---|---|---|
| Basic unit | Container units such as 20FT, 40FT and 40HQ. | RT, CBM, weight, minimum charges and similar units. | Estimations differ greatly between FCL and LCL. |
| Freight concept | Similar to renting a whole container. | Costs are allocated according to space and weight inside a consolidated container. | In LCL, some costs do not scale exactly with cargo volume. |
| Ocean Freight | Often shown by container size. | Sometimes shown as USD per RT. | Check the unit price, RT quantity and minimum charges. |
| CFS Charge | Rarely appears as a mixed CFS handling charge for FCL cargo. | Often charged per RT. | Check export-side and import-side CFS Charges separately. |
| Minimum charge | As the charge is per container, a minimum RT charge is not usually visible. | There may be a minimum of 1 RT or a minimum charge. | Minimum charges can significantly affect total costs for small shipments. |
Basic Concept of RT
RT is a billing concept that compares weight and volume, and adopts the greater of the two as the chargeable unit. When cargo is light but occupies a large volume, the charge is based on volume. Conversely, if cargo is small in volume but very heavy, the charge is based on weight.
Therefore, in LCL, “lighter actual weight means cheaper freight” does not always apply. Light but bulky cargo uses more container space, so RT is often calculated based on volume.
Conversely, cargo with small volume but heavy weight may have RT calculated based on weight. Items such as metal parts, machinery parts, tools and steel materials tend toward weight dominance, while furniture, foam materials, lightweight general cargo and cargo with large air gaps in packing tend toward volume dominance.
Weight Dominance vs. Volume Dominance
In LCL practice, charging based on weight is sometimes called “weight dominance,” and charging based on volume is called “volume dominance.” This distinction is important for explaining quotations and verifying discrepancies in invoicing.
| Category | Meaning | Typical cargo | Practical notes |
|---|---|---|---|
| Weight dominant | The condition where using weight as the basis for RT calculation results in a larger figure. | Iron products, metal parts, machine parts, tools, steel materials, stone materials and similar cargo. | Confirm Gross Weight, cargo handling restrictions and CFS acceptance. |
| Volume dominant | The condition where using volume as the basis for RT calculation results in a larger figure. | Furniture, foam materials, lightweight miscellaneous goods, empty boxes, palletized cargo and similar cargo. | Check dimensions after packing, pallet size and stackability. |
| Cargo with small weight and volume | The calculated RT may be small, but minimum charges may apply. | Small samples, parts, documents and small-quantity cargo. | Confirm minimum 1 RT, minimum charges, D/O Fee, Document Fee and other fixed charges. |
| Unusually shaped cargo | Cargo that is difficult to handle based only on simple weight or volume. | Long cargo, heavy cargo, non-stackable cargo, fragile cargo and similar cargo. | In addition to RT calculation, confirm special handling fees and CFS acceptance conditions. |
Definition of 1 RT
The definition of RT should be confirmed according to the tariff or company. In actual logistics practice, many rate tables treat 1 RT as the larger of 1 CBM or 1,000 kg. In this case, the larger value between volume at 1 CBM and weight at 1,000 kg is used as the RT for calculation.
On the other hand, some tariffs treat 1 Measurement Ton as 40 cubic feet, approximately 1.133 CBM. Since 40 cubic feet converts to about 1.132672 CBM, in practice it is often rounded to about 1.133 CBM.
Therefore, when looking at RT, it is necessary to confirm how many CBM constitute 1 RT, what weight equates to 1 RT, and whether the basis is 1 CBM or 1.133 CBM. RT is a general term, but actual billing prioritizes each company’s tariff definition.
Difference Between 1 CBM Basis and 1.133 CBM Basis
One confusing point in LCL quotations is the volume standard for 1 RT. The approach of treating 1 CBM as 1 RT and the approach of treating 40 cubic feet, or around 1.133 CBM, as 1 Measurement Ton can result in different calculations for the same cargo.
| Standard | Concept | Typical usage | Practical notes |
|---|---|---|---|
| Larger of 1 CBM or 1,000 kg | Compares a volume of 1 CBM and a weight of 1,000 kg, and uses the larger as the basis for 1 RT. | Common in current LCL freight, CFS Charges and consolidated tariffs. | Easy to understand in quotations, but minimum charges and separately listed fees must still be confirmed. |
| 40 cubic feet, approximately 1.133 CBM standard | Treats 1 Measurement Ton as 40 cubic feet, or about 1.133 CBM. | Sometimes found in older tariffs, port charges, specific local charges and company-specific tariffs. | Mixing this basis with the 1 CBM basis can lead to billing differences. |
| Weight-based standard | Sometimes 1,000 kg is treated as equivalent to 1 RT. | Frequently an issue for heavy goods, metal products, machine parts and similar cargo. | Confirm whether calculation is based on Gross Weight or Net Weight. |
| Company-specific tariff standard | Each company uses its own RT standard defined in quotations or tariffs. | Used in NVOCCs, consolidators, CFS, overseas agents’ rate tables and similar sources. | Check the actual quotation and tariff terms. Do not rely only on general assumptions. |
Calculation Example: Larger of 1 CBM or 1,000 kg
A common LCL quotation method calculates 1 RT as the larger of 1 CBM or 1,000 kg. For example, cargo of 2 CBM and 500 kg would be calculated as 2 RT because the 2 CBM volume exceeds 0.5 tons by weight.
Conversely, cargo of 0.8 CBM and 1,500 kg would be calculated as 1.5 RT because 1.5 tons by weight exceeds 0.8 CBM in volume.
Thus, the RT calculation considers not only the actual cargo weight but also the volume after packing. When requesting quotations, it is necessary to accurately communicate CBM, Gross Weight, packed dimensions, quantity and pallet presence.
Relation to Minimum Charges
In LCL rates, minimum charges may apply even if the cargo volume is small. For example, even if the actual cargo volume is 0.3 RT, billing may be based on a minimum of 1 RT. Additionally, Ocean Freight, CFS Charge, Document Fee, D/O Fee and other charges may each have minimum charges.
Therefore, for small shipments, costs do not always decrease proportionally with cargo volume. The smaller the cargo volume, the greater the proportion of minimum charges and fixed costs in the total amount.
When presenting LCL quotations to shippers, it is important to explain not only the RT unit price but also the minimum charges, local charges, D/O Fee, Document Fee and destination-side costs as part of the total amount.
RT and Ocean Freight
LCL Ocean Freight is sometimes expressed on an RT basis. For example, if the sea freight is stated as “USD 50/RT,” the actual invoiced amount is calculated by multiplying the cargo’s RT quantity by the unit rate.
However, total costs cannot be understood by Ocean Freight alone. Separate charges such as CFS Charge, D/O Fee, Document Fee, BAF, CAF, PSS, CIC and import-side local charges may also apply.
Therefore, in an LCL quotation, you should check not only whether the Ocean Freight RT unit price is low, but also which charges are calculated on an RT basis, which charges have minimum charges, and which charges are incurred at origin and destination.
RT and CFS Charge
CFS Charge may also be calculated on an RT basis for LCL cargo. On the export side, this relates to cargo unloading at CFS, storage, sorting, stuffing and drayage. On the import side, it involves unstuffing, sorting and preparation for delivery.
When the CFS Charge is displayed per RT unit, the billed amount varies depending on the cargo’s weight or volume. For long cargo, heavy cargo, dangerous goods, odorous cargo, liquid cargo, or cargo that cannot be stacked, additional charges may apply on top of the standard RT calculation.
The CFS Charge is not simply a freight charge but a cost related to actual handling operations at the site. Therefore, it is important to check not only the RT calculation but also the cargo’s shape, packaging condition, handling method and CFS acceptance availability.
How to Measure Volume
In RT calculation, cargo volume is important. Volume is usually calculated based on external dimensions after packaging. It is not the actual content size, but the external dimensions including cartons, wooden boxes, pallets and packaging materials.
Therefore, even if the cargo itself is small, if the packaging is large, if it is placed on a pallet, if it is crated in a wooden frame, or if the packaging contains a lot of empty space, the volume will be calculated larger than the actual contents.
If only the content dimensions are provided at the time of the quotation request, the RT may increase at actual CFS delivery or billing. Freight forwarders need to confirm the external dimensions after packaging with the shipper and, if necessary, also confirm pallet dimensions and stackability.
Understanding Weight
There are Net Weight and Gross Weight. Net Weight is the weight of the cargo itself, while Gross Weight is the total weight including packaging materials. For calculating sea freight charges and CFS operations, Gross Weight after packaging is usually confirmed.
In LCL quotations, mistaking whether the weight is Net Weight or Gross Weight can affect RT calculation and estimated charges. Especially for heavy cargo, the weight including packaging, wooden crates, pallets and reinforcements increases considerably, so confirming Gross Weight is important.
When receiving weight information from the shipper, do not just ask for “weight” but clarify whether it is Net Weight or Gross Weight, whether it is post-packaging weight, and whether pallet weight is included.
Points to Note for Palletized Cargo
For palletized cargo, calculations must be based on external dimensions and weight including the pallet. Even if the cargo itself is small, placing it on a pallet can increase height and width, resulting in a larger volume.
Also, with cargo that cannot be stacked, the upper space cannot be used, lowering stacking efficiency in practice. From the perspective of consolidators or CFS operators, such cargo may be treated as space-inefficient beyond what the simple CBM suggests.
For such cargo, it is necessary to check not only RT calculation but also stackability, top-stacking prohibition, handling method, pallet material, CFS acceptance conditions and the presence of additional charges.
Points to Note for Long Cargo and Heavy Cargo
For long cargo and heavy cargo, RT alone may not provide enough information. Conditions such as cargo length, weight, non-stackability, special handling requirements, or no contact with other cargo cannot be fully captured by simple weight and volume calculations.
Since LCL shipments are consolidated with cargo from other shippers in the same container, long cargo or heavy cargo may face restrictions in handling or stacking at the CFS. It is essential to confirm whether a forklift can be used, whether a crane is required, whether packaging is sufficient, and whether there is a risk of damaging other cargo.
Therefore, when handling long cargo or heavy cargo in LCL, it is necessary to check, in addition to RT calculation, dimensions, weight, packaging condition, handling method, CFS acceptance and any special handling charges.
Points to Note for Dangerous and Special Cargo
For dangerous goods, temperature-controlled cargo, odorous cargo, liquids, or cargo with leakage risk, costs cannot be judged by the usual RT unit price alone.
There may be charges for dangerous goods handling, special handling fees, isolated storage costs, additional checking fees, repackaging fees, label verification fees and similar items. Also, some cargo cannot be accepted in LCL consolidation in the first place.
RT is the basic billing unit, but it does not cover all additional costs related to the nature of the cargo. For special cargo, besides the RT rate, acceptance conditions, required documents, additional fees and packaging requirements should be confirmed in advance.
Freight Forwarder’s Scope of Involvement
RT is an important basic unit for explaining LCL quotations and billing. Freight forwarders need to clearly explain the RT definition, calculation units, minimum charges and additional costs for special cargo to the shipper.
| Situation | What the freight forwarder can explain | Party to confirm with | Points of caution |
|---|---|---|---|
| Basic RT explanation | Can explain that it is a billing unit based on the larger of weight or volume. | Shipper, sales staff, quotation staff | Make clear that charges are not determined by actual weight alone. |
| LCL quotation guidance | Can explain that Ocean Freight and CFS Charge may be calculated per RT unit. | NVOCC, consolidators, CFS, overseas agents | Confirm not only RT unit rates but also minimum charges and separate fees. |
| Minimum charge explanation | Can explain that a minimum 1 RT or minimum charge may apply even for small cargo volumes. | Quotation source, consolidators, billing source | Fixed costs can significantly impact total charges for small shipments. |
| Special cargo handling | Can explain that additional charges other than RT may apply for long cargo, heavy cargo, dangerous goods and similar cargo. | CFS, consolidators, dangerous goods staff, on-site staff | Confirm acceptance, handling methods and additional charges in advance. |
| Billing discrepancy checks | Can verify RT, CBM and weight differences between quotation and billing. | Shipper, CFS, billing source, on-site staff | Cross-check external dimensions after packaging, Gross Weight and actual measured values. |
| Advising shippers | Can advise that accurate dimension, weight and packaging information are necessary at the quotation stage. | Shipper, warehouse, packing company | If the information is inaccurate, differences between estimated and billed amounts may arise. |
Common Misunderstandings
| Common misunderstanding | Actual concept | Practical points to note |
|---|---|---|
| RT is determined solely by actual weight. | RT is often based on whichever is greater: weight or volume. | Check both Gross Weight and exterior dimensions after packing. |
| LCL charges decrease if the cargo is light. | Even if cargo is light, volume-based calculation applies if the volume is large. | Be careful with palletizing, wooden framing and packaging with lots of empty space. |
| Costs for small shipments decrease proportionally to cargo volume. | Minimum 1 RT or a minimum charge may apply. | Confirm minimum charges, D/O Fee, Document Fee and CFS Charges. |
| The definition of 1 RT is the same for all companies. | There are standards based on 1 CBM, 1.133 CBM or company-specific tariff bases. | Check the definition of 1 RT in quotations and tariffs. |
| Dimensions of the contents alone can be used for quotations. | Usually, exterior dimensions after packing are used. | Confirm dimensions including cartons, wooden boxes, pallets and packing materials. |
| Providing Net Weight is sufficient. | Gross Weight is often required for freight calculation and CFS operations. | Check whether the weight includes packing materials and pallets. |
| You can determine the total amount by looking at the RT unit price. | Charges such as CFS Charge, D/O Fee, Document Fee and surcharges arise in addition to Ocean Freight. | Review quotations based on total amounts, not just RT unit price. |
| Calculating by RT treats special cargo the same as regular cargo. | Dangerous goods, long cargo, heavy items and non-stackable cargo may incur additional fees or acceptance restrictions. | Besides RT calculation, check CFS acceptance and special handling fees. |
Cases That Often Cause Issues in Practice
| Case | Points that often cause problems | Documents to confirm | Practical points to note |
|---|---|---|---|
| Requested quotation based only on actual weight | For volume-based cargo, final charges may be higher than the quoted amount. | Packing List, exterior dimensions after packing, Gross Weight, CBM calculation sheet | Request quotations after confirming both weight and volume. |
| Volume increased after palletizing | Exterior dimensions after palletizing may exceed cargo dimensions, increasing RT. | Dimensions after palletizing, packing photos, Packing List | Confirm the presence of pallets and stackability at the quotation stage. |
| Overlooked minimum charges | 0.3 RT cargo may be invoiced at minimum 1 RT or a minimum charge. | Quotation, LCL tariff, minimum charge section, invoice | Check minimum charges, not just RT unit prices. |
| Confused 1 CBM and 1.133 CBM standards | The calculated RT differs for the same cargo, causing discrepancies between quotations and invoices. | Tariff, quotation conditions, invoice details, RT definition section | Confirm the 1 RT definition at the quotation stage. |
| Used Net Weight for quoting | Invoicing often uses Gross Weight, resulting in differences for weight-based cargo. | Packing List, weight certificates, packing details, invoice | Confirm Gross Weight including packing materials, wooden frames and pallets. |
| Quoted long cargo as regular LCL | The cargo may be rejected at CFS or incur special handling fees and extra storage charges. | Cargo dimensions, packing photos, CFS acceptance conditions, consolidator confirmation records | Check shape and cargo handling methods, not just RT. |
| Quoted dangerous goods at a normal RT unit price | The cargo may incur dangerous goods handling fees, isolation storage costs and additional document verification charges. | SDS, dangerous goods declaration, UN number, CFS acceptance conditions, quotation details | For dangerous goods, check acceptance and additional fees beyond the RT unit price. |
| Compared only RT unit price against other companies’ quotations | Ocean Freight may be cheaper, but total costs including CFS and D/O Fees can be higher. | Quotation, cost details, local charges at origin and destination | Compare on a total cost basis, not just RT unit price. |
Decision Checklist
| Check timing | Party to confirm with | Items to confirm | Action if issues arise |
|---|---|---|---|
| When requesting quotation | Shipper, warehouse, packing company | Post-packaging external dimensions, Gross Weight, number of packages, presence of pallets | If information is insufficient, clearly state that it is an approximate estimate. |
| When obtaining LCL quotation | NVOCC, consolidator, overseas agent | RT unit price, definition of 1 RT, minimum charge, CFS Charge | Confirm whether the basis is 1 CBM or 1.133 CBM. |
| When presenting quotation to shipper | Shipper, sales representative | Ocean Freight, CFS Charge, D/O Fee, Document Fee, surcharges | Explain not only the RT unit price but also the total amount and separately billed charges. |
| When verifying palletized cargo | Shipper, warehouse, packing company, CFS | Post-pallet external dimensions, pallet stacking possibility, “stacking prohibited” indications | Check for possible volume increase and special handling charges. |
| When verifying heavy cargo | Shipper, CFS, consolidator | Gross Weight, weight per piece, handling method, floor load restrictions | Confirm whether CFS will accept it and check for additional handling fees. |
| When verifying long cargo | Shipper, CFS, consolidator | Maximum length, packaging condition, stacking possibility, mixed loading possibility | Confirm in advance whether it can be accepted as regular LCL cargo. |
| When verifying dangerous or special cargo | Shipper, dangerous goods specialist, CFS, consolidator | SDS, UN number, dangerous goods class, packaging, acceptance possibility | Confirm hazardous cargo handling fees and additional charges separately from the RT unit price. |
| When verifying invoice | Billing source, CFS, sales representative, accounting | Quoted RT, actual measured RT, minimum charge, billing unit price | If there are discrepancies, cross-check dimensions, weight and tariff definitions. |
Example 1: Volume Unexpectedly Increased Due to Palletizing
This is a case where the shipper requested an LCL quotation based solely on the cargo unit’s dimensions. At the time of the quotation, CBM was calculated using only the cargo unit dimensions, but in the actual shipment, the cargo was loaded onto pallets, and the dimensions including the pallets became larger. As a result, the volume basis applied, and the billable RT increased compared to the estimate.
Here, the issue was not the RT calculation itself but the failure to confirm post-packaging external dimensions at the quotation stage. In LCL, volume calculations are generally based on the outer dimensions after packing, not only on the cargo itself. Dimensions including pallets, wooden crates, cartons and cushioning materials become the basis.
Freight forwarders need to confirm at the quotation request stage whether the dimensions are post-packaging external dimensions, whether pallets are included, and whether stacking is possible. This is particularly important for palletized cargo, as volume tends to increase compared to the actual cargo unit.
Example 2: Total Cost Became High Due to Minimum Charge on Small Cargo
For a small cargo around 0.3 RT, the shipper assumed that costs would be very low because of the small volume. However, the LCL quotation applied a minimum charge of 1 RT, in addition to fixed fees such as D/O Fee, Document Fee and CFS Charge. Consequently, the total billed amount appeared high relative to the cargo volume.
In LCL shipments, minimum charges may be set even when cargo volume is small. Minimum charges or fixed fees may apply not only to Ocean Freight but also to CFS Charges, D/O Fees, Document Fees and local charges at the destination.
To avoid such misunderstandings, it is important to explain the total amount including minimum charges and fixed fees, not only the RT unit price. Confirming the total cost is especially important for small cargo rather than focusing solely on unit price.
Example 3: Billing Differences Due to Mixed Use of 1.133 CBM and 1 CBM Basis
At the quotation stage, 1 CBM was roughly treated as 1 RT, but the actual invoice used a tariff for a certain CFS Charge that applied 1 Measurement Ton, meaning 40 cubic feet, or approximately 1.133 CBM, as the basis. The shipper felt that the RT calculation at the time of quotation did not match the RT calculation on the invoice.
Although the term RT is the same, its definition is not always consistent. Some tariffs adopt the larger of 1 CBM or 1,000 kg, while others treat 1 Measurement Ton as 40 cubic feet, or about 1.133 CBM.
Preventing such discrepancies requires confirming the definition of 1 RT at the quotation stage. This is particularly important for older tariffs, port charges, CFS-related charges and local charges by overseas agents, where definitions may differ from the typical 1 CBM basis.
Practical Points to Note
RT is a crucial billing unit for understanding LCL charges. While FCL rates are usually considered per container, LCL charges for Ocean Freight and CFS Charges are often calculated using RT based on cargo units.
However, the definition of 1 RT varies by tariff. Some use the larger of 1 CBM or 1,000 kg, while others use 1 Measurement Ton as 40 cubic feet, about 1.133 CBM. Minimum 1 RT or minimum charge may also apply.
When obtaining LCL quotations, it is important to confirm not only the RT unit price but also post-packaging external dimensions, Gross Weight, minimum charges, CFS Charges, D/O Fees, Document Fees, additional fees for special cargo and destination local charges as part of the total cost.
Summary
RT (Revenue Ton) is a billing unit used to calculate charges such as LCL freight and CFS Charges. Generally, fees are calculated based on whichever is greater between weight and volume.
RT includes not only actual weight but also volume based on post-packaging external dimensions, Gross Weight, the RT definition and minimum charges. For cargo with light weight but large volume, volume dominance applies; for small cargo with heavy weight, weight dominance applies.
In practice, it is necessary to confirm whether the basis is the larger of 1 CBM or 1,000 kg, or a 40 cubic feet, approximately 1.133 CBM, measurement ton, and whether minimum charges apply. Total costs should be checked comprehensively, including Ocean Freight, CFS Charges, D/O Fees, Document Fees, surcharges and additional fees for special cargo, rather than judging by the RT unit price alone.
