How do you calculate ground pressure for cars?

Ground pressure for cars is calculated by dividing the vehicle's weight by the area of its tire contact patch with the ground. The formula is: Ground Pressure (psi) = Vehicle Weight (lbs) / Tire Contact Area (sq inches). To find the tire contact area, you can multiply the width of the tire by the length of the contact patch, which can be estimated based on the tire's inflation and load characteristics. This calculation helps assess how the vehicle will interact with different surfaces, impacting traction and stability.