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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.



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