Please note: These online calculators should be used to derive "first approximations" only. They are provided free-of-charge and are intended to give you estimates only. They do not take into account many variables which a reconstructionist would need to evaluate in order to perform a proper accident reconstruction. McNally & Associates ARS, LLC in no way supports data derived from these calculators.
**Research**
VIN Decoder
Enter a vehicle's VIN to retrieve year, make, model, and other
information.
**Calculators**
Bike Speed Calculator
Determine the speed a cyclist is traveling when front and rear gear
teeth and wheel diameter are known. Gives speeds for cadences between
50 and 120.
Minimum Speed Calculator
Determine the minimum speed for a vehicle before braking when the skid distance and coefficient of friction are known.
Distance to Stop Calculator
Determine the minimum distance needed for a vehicle to stop when the initial speed and coefficient of friction are known (assuming 1.5 seconds perception/reaction time).
Braking Distances Online Chart |
PDF Version
Determine the minimum distance needed for a vehicle to stop when the initial speed and coefficient of friction are known.
Speed from Pedestrian Throw Calculator
Determine the minimum speed for a vehicle when a pedestrian's height and throw distance are known. |