How to Calculate Truck Axle Loads

Updated April 17, 2017

When loading a commercial truck, you must compute and weigh each load on each axle. Overloading for extended periods of time can create steering problems, overloaded tires and maintenance issues. There are certified weight scales you can use as well as a calculation to ensure you are loading the truck properly.

Locate the nearest certified truck weight scale before loading the truck (See Resources). Get each axle weighed separately. This will tell you what the axle loading is before the truck is loaded.

Subtract the unloaded weight of each axle from the maximum allowable loaded weight of each axle.

Use the following formula to compute for loading front and rear axle weights: (LCf)(Lf) - (LCr)(WB-Lf) = 0. Replace "LCf" with "Load capacity of the front axle." Replace "LCr" with "Load capacity of the rear axle." Replace "LF" with the distance to load centre from the front axle. Replace "WB" with the "Wheelbase of the vehicle."

Things You'll Need

  • Calculator
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About the Author

Katrina Matterhorn is experienced in technology consulting for two of the largest technology companies in the world. Since 2009 she has specialized in technology, business and home and garden articles. She has a double major in English and political science from Austin College in addition to Microsoft and IBM certifications.