Partial Truckload Calculator
Estimate freight density, class, and costs for your PTL shipments with our easy-to-use tool.
Total number of pallets or skids in the shipment.
Your carrier’s base cost per mile or a flat rate.
Total mileage for the shipment route.
Estimated Shipping Cost
Total Volume
Shipment Density
Estimated Freight Class
Linear Feet Used
Cost Contribution Analysis
What is a Partial Truckload Calculator?
A partial truckload calculator is a specialized tool designed to help shippers estimate the costs and logistical metrics associated with a Partial Truckload (PTL) shipment. PTL shipping occupies a unique space between Less-Than-Truckload (LTL) and Full Truckload (FTL) freight. It’s ideal for shipments that are larger than typical LTL but not large enough to require a full 53-foot trailer. Typically, this means freight that consists of 5 to 18 pallets and weighs between 5,000 and 40,000 pounds.
Unlike LTL, where pricing is strictly tied to standardized freight classes, PTL pricing is more flexible and often based on the amount of space (linear feet) the shipment occupies and the total weight. This calculator helps you determine key factors like shipment density and volume, which are crucial for obtaining an accurate partial truckload quote from carriers.
Partial Truckload Formula and Explanation
While PTL pricing doesn’t rely on freight class as strictly as LTL does, calculating the shipment’s density is still a fundamental step. Density helps carriers understand the shipment’s profile and how it will fit with other freight in the trailer.
The core formulas used are:
- Total Cubic Volume:
(Length × Width × Height) × Number of Pallets - Shipment Density:
Total Weight / Total Cubic Volume - Estimated Cost:
(Distance × Cost Per Mile) × Density Multiplier
The “Density Multiplier” is a conceptual value used in this calculator to simulate how carriers adjust pricing based on freight class. Very low-density items (which take up a lot of space for their weight) are more expensive to ship and thus have a higher multiplier.
Variables Table
| Variable | Meaning | Unit | Typical Range |
|---|---|---|---|
| Dimensions (L, W, H) | The size of a single pallet or skid. | Inches or Feet | 48″ x 40″ is standard |
| Total Weight | The combined weight of all pallets. | Pounds (lbs) or Kilograms (kg) | 5,000 – 40,000 lbs |
| Volume | The total space the shipment occupies. | Cubic Feet (cf) | 100 – 2,000 cf |
| Density | The weight of the freight per cubic foot. | Pounds per Cubic Foot (pcf) | 1 – 50 pcf |
| Freight Class | An industry classification based on density. | Numeric (50-500) | 50 (most dense) to 500 (least dense) |
Practical Examples
Example 1: Dense, Compact Freight
A shipper needs to move 8 pallets of machine parts. The shipment is heavy but doesn’t take up much space.
- Inputs: 8 pallets, 48″L x 40″W x 40″H each, 12,000 lbs total, 800-mile distance.
- Calculation: The shipment has a high density (around 18.75 pcf), which corresponds to a low freight class (e.g., Class 70). This makes it efficient to ship.
- Results: The calculator would show a high density, low freight class, and a correspondingly lower estimated cost compared to a less dense shipment of the same weight.
Example 2: Light, Bulky Freight
A different shipper needs to move 8 pallets of empty plastic containers.
- Inputs: 8 pallets, 48″L x 40″W x 72″H each, 3,000 lbs total, 800-mile distance.
- Calculation: This shipment has a very low density (around 2.6 pcf), corresponding to a high freight class (e.g., Class 250). It takes up a lot of trailer space for its weight. For more information, see our guide on the freight density calculator.
- Results: The calculator will show a very low density and a high freight class, resulting in a significantly higher estimated cost, as the carrier is selling space, which this shipment consumes in large amounts.
How to Use This Partial Truckload Calculator
Follow these steps to get your PTL estimate:
- Enter Pallet Count: Input the total number of pallets, skids, or pieces in your shipment.
- Provide Dimensions: Enter the length, width, and height for a single, representative pallet. Ensure you select the correct unit (inches or feet). The calculator assumes all pallets are the same size for simplicity.
- Enter Total Weight: Input the total weight of the entire shipment and select the unit (pounds or kilograms).
- Input Cost & Distance: Enter the base rate or cost-per-mile provided by your carrier and the total distance of the trip in miles. This is essential for the cost estimation.
- Review Results: The calculator instantly provides an estimated total cost, along with crucial intermediate values like total volume, shipment density, and the estimated freight class.
Key Factors That Affect Partial Truckload Rates
Understanding what drives PTL costs can help you optimize your shipping budget. Here are the most significant factors:
- Space/Linear Feet: This is often the most critical factor. PTL pricing is heavily based on how much floor space your freight occupies in the trailer. A standard 53′ trailer has about 53 linear feet of space. Knowing your truckload capacity is important.
- Weight: While space is primary, weight is still a key factor. Heavier shipments require more fuel to transport and contribute more to the truck’s legal gross vehicle weight limit.
- Shipment Density: As shown by our partial truckload calculator, density (pounds per cubic foot) is a proxy for how efficiently your freight uses space. Carriers prefer dense, stackable freight.
- Distance/Lane: The mileage from origin to destination directly impacts cost due to fuel, driver wages, and equipment wear. Popular, high-traffic lanes are often cheaper than remote or less-traveled routes.
- Market Conditions: Supply and demand play a huge role. During peak seasons or in tight markets, truck capacity is scarce, and rates will be higher.
- Fuel Surcharges: Carriers pass on the fluctuating cost of diesel to shippers through a fuel surcharge, which is typically a percentage of the base rate.
- Accessorials: Any service beyond standard dock-to-dock transport will incur extra fees. This includes liftgate service, residential delivery, inside delivery, and driver assist.
Frequently Asked Questions (FAQ)
LTL (Less-Than-Truckload) shipments are typically smaller (1-6 pallets) and are priced based on a strict freight classification system. PTL is for larger shipments (5-18 pallets) where pricing is more dependent on the space used (linear feet) and market rates. PTL freight also tends to undergo less handling, reducing the risk of damage. For a detailed comparison, check out our article on LTL vs PTL shipping.
While PTL is not as rigidly dependent on freight class as LTL, carriers still use density and freight profile (stow-ability, handling) to assess the shipment. Our calculator provides an *estimated* class based on density, which is a useful reference point for understanding your freight’s profile. Learn more with this guide on what is freight class.
Generally, yes. From a carrier’s perspective, higher density freight is more profitable because it takes up less space relative to its weight. This often translates to a better rate for the shipper.
To estimate linear feet, divide the total square footage of your pallets by the width of the trailer (usually 8.5 feet). A simpler rule of thumb: one standard 48″x40″ pallet is considered to occupy about 4 linear feet if placed side-by-side.
This partial truckload calculator provides a simplified estimate for planning purposes. Real-world quotes depend on many live factors, including specific lane dynamics, truck availability, fuel surcharges, and any accessorial charges, which cannot be captured by a simple formula. Always get a firm quote from a carrier.
If your shipment is over 6-8 pallets but doesn’t fill a full truck (under 26 pallets), PTL is likely more cost-effective. You only pay for the space you use, avoiding the expense of a dedicated truck.
Your carrier or broker can often provide a “cost per mile” rate for a specific lane. If you have a flat rate quote instead, you can work backward: set the ‘Distance’ to 1 mile and enter the flat rate into the ‘Base Rate / Cost Per Mile’ field.
No, for simplicity, this calculator assumes all pallets in the shipment are of uniform size. If you have mixed pallet sizes, you should calculate their total volume and average dimensions separately before using the tool or consult our shipping cost estimator for more complex scenarios.