Weight Distribution Calculator

The Weight Distribution Calculator breaks down how a semi-truck's total load is spread across its axles — critical for staying within legal weight limits and avoiding fines at weigh stations. Enter your Total Weight, Tractor Weight, and Steer Axle Weight to calculate the Drive Axle Weight and Trailer Axle Weight. You'll also see the percentage of load carried by each axle group — steer, drive, and trailer — so you can spot imbalances before hitting the road.

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Results

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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Frequently Asked Questions

What is axle weight distribution and why is it important?

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.

How do I calculate drive axle weight?

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.

What are the legal weight limits for truck axles?

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.

How can I adjust my truck's weight distribution?

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.

Can this calculator be used for different types of vehicles?

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.

What happens if my axle weights are unbalanced?

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.

How often should I check my weight distribution?

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.