Enter the speed of the car in MPH and the radius of the turn into the calculator to determine the g-force pulled around the turn.

MPH to G Force Formula

The following equation is used to calculate the G forces from MPH.

Gf = (V/2.237)^2 / R / 9.81
  • Where Gf is the number of G -forces pulled throughout a turn
  • V is the velocity of the car (mph)
  • R is the radius of the turn (m)

To calculate the g force from miles per hour, square the velocity of the car over 2.237, divide this result by the radius, then divide again by 9.81.

How many G-Forces does a car pull around a turn?

The amount of G-forces a car pulls around a turn is dependent on two factors.

  1. The speed of the car. The larger the velocity the greater the acceleration/g-forces.
  2. The radius of the turn. The tighter the turn, the higher the acceleration/g-forces.

How to Calculate G Force from MPH?

Example Problem:

The following example outlines the steps and information needed to calculate G force from MPH.

First, determine the speed of the car. For this example, the car is moving around the turn at a speed of 50 MPH.

Next, determine the radius of the turn. This particular turn has a radius of 25m.

Finally, calculate the number of G-forces using the formula above:

Gf = (V/2.237)^2 / R / 9.81

Gf = (50/2.237)^2 /25 / 9.81

Gf = 2.03 Gs

FAQ

What is the significance of the number 2.237 in the MPH to G Force formula?

The number 2.237 is used to convert the velocity of the car from miles per hour (MPH) to meters per second (m/s), which is necessary because the formula for calculating G-force is based on the metric system, and other constants in the formula are also in metric units.

Can the MPH to G Force formula be used for vehicles other than cars?

Yes, the MPH to G Force formula can be applied to any vehicle moving at a certain speed and making a turn with a known radius, including motorcycles, bicycles, and even aircraft, as long as the appropriate values are used for the velocity and radius of the turn.

How does the radius of the turn affect the G-force experienced?

The radius of the turn directly impacts the G-force experienced during the turn. A smaller radius (tighter turn) results in a higher G-force because the vehicle has to change direction more sharply, requiring more acceleration. Conversely, a larger radius (wider turn) results in a lower G-force, as the vehicle can navigate the turn with less acceleration.