Corner Weight Calculator

Corner weighting measures how evenly a vehicle's mass is distributed across all four wheels — a critical setup step for handling balance in motorsport and performance driving. Enter your Front Left, Front Right, Rear Left, and Rear Right weights, then select your weight unit (lbs or kg) to get your Cross Weight Percentage. Secondary outputs include Total Weight, Front Weight %, Left Side Weight %, and the absolute Cross Weight (LF+RR).

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Results

Cross Weight Percentage

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Total Weight

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Front Weight

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Left Side Weight

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Cross Weight (LF+RR)

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Frequently Asked Questions

What is cross weight percentage and why is it important?

Cross weight percentage is the diagonal weight (left front + right rear) divided by total weight. It determines handling balance - 50% provides neutral handling, above 50% promotes oversteer, and below 50% promotes understeer.

What is the ideal cross weight percentage for racing?

For most racing applications, 50-52% cross weight is ideal for oval track racing. Road racing typically uses 49-51%. Street cars usually run closer to 50% for balanced handling.

How do I measure corner weights accurately?

Use four corner scales or a single scale with three equal-height spacers. Ensure the car is on level ground, fuel tank is at race level, and driver/ballast is in position. Take measurements with suspension settled.

What causes uneven corner weights?

Uneven corner weights can result from bent chassis, uneven ride heights, different spring rates, worn suspension components, or improper ballast placement. Adjustable coilovers help correct imbalances.

How does cross weight affect handling?

Higher cross weight (above 50%) makes the car looser and more likely to oversteer. Lower cross weight creates understeer tendencies. The optimal percentage depends on track type and driving style.

What's the difference between cross weight and wedge?

Cross weight and wedge refer to the same measurement - the diagonal weight distribution. The terms are used interchangeably in racing to describe the left front + right rear weight percentage.

How do I adjust corner weights?

Adjust corner weights by changing ride heights with coilovers, moving ballast, or using adjustable spring perches. Small adjustments have big effects - make changes incrementally and re-measure.

What's the ideal front/rear weight distribution?

Front weight distribution varies by vehicle type: front-wheel drive cars typically run 58-62%, rear-wheel drive sports cars 48-52%, and race cars are optimized based on track requirements and aerodynamics.