If you ship LTL freight, accurately measuring your shipments is critical to controlling costs and avoiding billing surprises—yet the process has undergone significant changes in recent years. Understanding how dimensioners work can help you budget more effectively and prevent unexpected rate adjustments. In this blog post, we'll explore how dimensioners work, their impact on shippers and customers, and best practices for LTL shipment measurement and billing.
In years past, you were charged based on the simple proposition of shipment size or weight. As times and technology evolved, rates for shipping commodities changed to accurately measure the length x width x height (or what overnight shipping pioneers FedEx referred to as DIM weights). Today, when you work with modern LTL transporters, they utilize equipment called dimensionalizers or dimensioners to determine your shipping costs.
Have you ever wondered where DIM weight pricing came from? The concept started with overnight shippers, including FedEx, back in the early 1980s. At the time of pick-up, the courier would measure the length x width x height and compare those dimensions with the weight of your package. This created a dimension factor—the greater dimension factor (or whether your package weighed more than the DIM factor) became your charged rate. This practice evolved and changed throughout the years but became an official standard in 2015 when the USPS began integrating DIM weights into their shipping charges.
When you use a dimensioner (sometimes spelled dimensionalizer), you're using a volume and weight measuring device that factors three-dimensional or "cube" shaped objects including parcels, packages, cartons, and boxes. When the volume of your item is determined, it calculates a shipping rate based on how much space or weight it takes up within a shipping container.
In the past, you may have been charged based on weight or shipping class (such as time needed to expedite a shipment). However, over the past few years, LTL carriers have embraced the DIM weight billing process—as it is more accurate, and fair to you and the shipper alike. The dimensionalizer allows LTL carriers to collect shipping revenue based on the space that your shipment occupies on trailers. This billing model has been used across the globe for years—but eventually found its way to the LTL industry.
How Dimensioners Impact Shippers
The use of a dimensioner vastly improved shipping efficiency for carriers. Before using this equipment, when you requested a quote, LTL shippers would provide you with a 'ballpark estimate' for shipping rates based on the size of your load, miles or time needed to transport the commodity, or other cargo packed into each shipping trailer. When your final bill arrived, the prices may have changed from the initial bid due to multiple factors—but mainly, inaccurate measurements of your shipment.
The dimensionalizer has removed this variable from the equation, providing you and LTL carriers with accurate estimations for shipping your product from one location to another. The dimensionalizer also helps LTL carriers plan and load their shipments more accurately, provide better arrival estimates to you, and in the end—saves money for the LTL carrier.
How Dimensioners Impact Customers
Contrary to popular belief, the use of dimensioners is quite beneficial for you as a customer. As we stated above, in years past, your shipping rates would change based on the actual weight of the parcel, other items in the container, and several variables that were out of your control. In some instances, you would receive your bill and spend hours trying to audit the freight invoice or contact the shipper to determine why the estimated rate changed.
The older billing methods also made it nearly impossible for you to accurately budget shipping costs. While in some cases, the changes in shipping estimations would be cheaper for you, it still impacted your monthly P & L statements. The activation of dimensioners for LTL shipments provides easy to budget and accurate shipping costs for your business.
Dimensioner Best Practices
While dimensioners are professionally built and quite accurate at measuring freight, there are a few best practices that you should be aware of when working with LTL carriers:
• Stay on top of routine calibration: There are several types of dimensioners in use today. However, one thing they all have in common is the need for frequent adjustment and calibration. This ensures the DIM calculation is measured accurately. Completing routine maintenance as recommended will also keep the machines in working order.
• Upgrade equipment and software as it becomes available: Many automated dimensionalizers use software to calculate the rate. The manufacturers frequently update software to patch errors or troubled codes. To maintain consistency, make sure your carrier works with the manufacturer to upload software or upgrade equipment as needed.
• Set up shipping profiles: Many new dimensioners allow LTL carriers to set up shipping profiles for frequent customers who ship the same commodities. This will save you time, resources, and money in the short and long-term.
Final Thoughts
Dimensioners have revolutionized LTL shipping by bringing accuracy and transparency to freight measurement and billing. When you understand how this technology works and its benefits, you can better manage your shipping costs and avoid billing surprises. The shift from traditional weight-based billing to DIM weight pricing reflects the industry's commitment to fairness and efficiency for both carriers and shippers.