Turning Circle/Radius Calculator

How to Use the Calculator

1. Basic Calculator

1. Wheel Base (m): Enter the wheel base of the vehicle, such as 2.5 meters.
2. Turn Angle (degrees): Input the turn angle, for instance, 30 degrees.
3. Turning Radius (m): Leave this blank to calculate the turning radius, or input a value if you want to calculate the wheel base or turn angle.

2. Advanced Calculator

1. Wheel Base (m): Enter the wheel base of the vehicle, for example, 2.8 meters.
2. Turn Angle (degrees): Input the turn angle, such as 45 degrees.
3. Track Width (m): Enter the track width, like 1.6 meters.
4. Coefficient of Friction: Input the coefficient of friction, for instance, 0.8.

Formula

For the basic calculator, the formula to find the turning radius is:

​$\text{TR}=\frac{WB}{\tan (a}$

Variables

How To Calculate Car Turning Radius

Example 1: Basic Calculator

• Wheel Base (m): 3.0 meters
• Turn Angle (degrees): 35 degrees
• Turning Radius (m): Leave blank

To calculate the Turning Radius:

1. Convert the turn angle to radians:

2. Use the formula:

3. Calculate:

So, the turning radius is 4.28 meters.

Example 2: Advanced Calculator

• Wheel Base (m): 2.5 meters
• Turn Angle (degrees): 40 degrees
• Track Width (m): 1.5 meters
• Coefficient of Friction: 0.85

To calculate the Optimal Speed for Turn:

1. Convert the turn angle to radians:

2. Calculate the turning radius:

3. Calculate the inside wheel turn radius:

4. Calculate the optimal speed:

So, the optimal speed for the turn is 18.38 km/h.

Vehicle Turning Radius Chart (Approximate)

Thank you for using our tool.