Calculate vehicle weight distribution: front and rear axle weights from total weight and front %, front/rear % from axle weights, or four-scale cross weight.

Unit changes reinterpret the numbers; convert all readings before switching units.

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Weight Distribution Formula

The following formulas are used to calculate the weight distribution:

FW = (FP / 100) × TW
RW = TW - FW

Variables:

  • TW is the total weight (pounds or kilograms, used consistently)
  • FP is the front weight percentage (%)
  • FW is the front weight (same unit as TW)
  • RW is the rear weight (same unit as TW)

To calculate the front weight, multiply the total weight by the front weight percentage divided by 100. To find the rear weight, subtract the front weight from the total weight.

What is Weight Distribution?

Weight distribution refers to how the total weight of an object or vehicle is divided between its front and rear. Proper weight distribution is crucial for vehicle stability, handling, and safety. It affects the grip of the tires on the road and can influence braking, acceleration, and cornering. In vehicle design and load management, achieving the right balance between front and rear weight is essential for optimal performance.

How to Calculate Weight Distribution?

The following steps outline how to calculate the weight distribution:

  1. First, determine the total weight (TW) of the object or vehicle in pounds.
  2. Next, determine either the front weight percentage (FP) or the rear weight percentage.
  3. Use the formula FW = (FP / 100) * TW to calculate the front weight (FW).
  4. Use the formula RW = TW – FW to calculate the rear weight (RW).
  5. Select the total-and-percentage mode above to check the axle split. The four-corner modes use RF + LR cross % = (FR + RL) / (FL + FR + RL + RR) × 100. Unit changes reinterpret all entered weights; they do not convert them. The 50% comparison band is not a universal setup target. See Longacre scale setup guidance for the effects of scale plane and suspension adjustment.

Example Problem:

Use the following variables as an example problem to test your knowledge.

Total weight (TW) = 3000 pounds

Front weight percentage (FP) = 60%. Front weight = 1,800 pounds; rear weight = 1,200 pounds.