Enter your Total Weight, Tractor Weight, and Steer Axle Weight into the Weight Distribution Calculator to find your Drive Axle Weight, along with your Trailer Axle Weight and the percentage distribution across your Steer, Drive, and Trailer Axles — so you can see exactly how your load is spread before hitting the road.
Drive Axle Weight
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Trailer Axle Weight
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Steer Axle Distribution
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Drive Axle Distribution
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Trailer Axle Distribution
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Axle weight distribution refers to how the total weight of a vehicle is spread across its different axles. It's crucial for vehicle safety, tire wear, fuel efficiency, and compliance with DOT weight regulations.
Drive axle weight is calculated by subtracting the steer axle weight from the total tractor weight. The formula is: Drive Axle Weight = Tractor Weight - Steer Axle Weight.
Federal limits are typically 12,000 lbs for steer axle, 34,000 lbs for drive axles, and 34,000 lbs for trailer axles. However, state regulations may vary, so check local requirements.
You can adjust weight distribution by repositioning cargo, adjusting trailer tandems, moving the fifth wheel, or redistributing fuel between tanks. Always ensure you stay within legal limits.
This calculator is designed for semi-trucks and trailers. For other vehicle types like straight trucks or buses, the axle configuration and weight distribution formulas may differ.
Unbalanced axle weights can lead to uneven tire wear, poor vehicle handling, increased fuel consumption, and potential safety hazards. It may also result in DOT violations and fines.
Check weight distribution whenever you load cargo, change trailer types, or notice unusual tire wear patterns. Regular checks help maintain safety and compliance with regulations.