A loaded truck or a towing setup needs far more stopping room than the car you learned to drive in. Enter your speed and road conditions for the distance in seconds and feet, adjusted for weather.
Safe Following Distance Calculator — Know How Far Back to Drive
The 3-second rule changes in the rain. It changes with load. It changes at speed. Calculate the right distance for your actual conditions.
Enter your speed, vehicle type, road conditions, and load. The calculator returns the recommended following distance in metres and car lengths.
Most rear-end collisions happen within the legal following distance because drivers haven’t adjusted for conditions. This calculator closes that gap.
All drivers — particularly useful for towing, driving in wet conditions, and commercial operators.
- NHTSA stopping distance data
- FMCSA commercial vehicle following distance requirements
- State highway code guidelines
Disclaimer: This tool is provided for educational and informational purposes only and does not constitute legal, safety, or professional advice. Sunferno Automotive Accessories cannot verify how products are installed, used, or attached in your specific vehicle or situation — proper installation, use, and securement are solely the responsibility of the user. Laws and regulations vary by jurisdiction and change over time; always confirm current requirements with your local authorities or a qualified professional. Sunferno products must be used strictly in accordance with manufacturer instructions and applicable regulations.