Online Tools

    Braking Distance Calculator

    Estimate reaction distance, braking distance and total stopping distance from speed, reaction time and road friction.

    Stopping distance is reaction plus braking

    For English search intent, the useful result is total stopping distance in feet, split into reaction distance and physical braking distance. Speed is entered in mph and road grip is represented by a friction coefficient.

    Do not use as a following-distance rule
    This is a physics estimate, not a safe-driving instruction. Real stopping distance changes with tires, brakes, grade, load, ABS behavior, visibility and driver condition.

    Frequently Asked Questions

    Sources and References

    Calculations are based on the listed reference sources. Links open in a new tab.

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