Thorn Consulting Services - Certified Accident Reconstructionist


Accident Reconstruction and Investigation Products

Free Online Crush Calculator
Our online Crush Calculator is free for you to use again and again. This crush calculator and many others are available as an Excel based program (SEE BELOW). This calculator is property of Thorn Consulting Services ( and may not be copied, re-distributed or sold under any circumstances, unless expressly authorized by TCS. Contact us now for more information.

Calculators are available in Imperial only.

Accident Reconstruction Equation CalculatorAccident Reconstruction Equation Calculator
A Microsoft Excel based program with numerous calculations/equations and ranges needed for accident reconstruction in over fifty-four (54) different spread sheets, with instructions on how to use Excel’s powerful Goal Seek and Solver functions ($150) – PC & Apple compatible.

  • Slide To Stop
  • Critical Speed Scuff
  • Airborne
  • Momentum - Collinear & Planer
  • Crush & Stiffness Coefficients
  • Time & Distance
  • Searle
  • Kinetic Energy
  • Balancing Impact Forces
  • Low Speed Delta-V
  • Trigonometry
  • Simultaneous Equations
  • Metric Conversions
  • Monte Carlo Simulation for Momentum & Slide-To-Stop
  • Center of Mass
  • Tire Size Comparison
  • Bicycle Speed
  • Heavy Truck Breaking Efficiency
  • ...and even more

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Accident Reconstruction Equations Calculator (Excel Spreadsheet - only) - IMPERIAL
TI-83/TI-84 Calculator Programs (only) - IMPERIAL
TI-89 Calculator Program (only)- IMPERIAL
TI-83 Calculator plus programs and TI-Graph Link Cable - IMPERIAL
TI-84 Calculator plus programs and TI-Graph Link Cable - IMPERIAL
TI-89 Titanium Calculator plus programs and TI-Graph Link Cable - IMPERIAL

The TI programs and Excel file are typically emailed within 24 hours of payment.  Calculators are sent via USPS priority mail within 1-3 days.

T1-83 Plus CalculatorT1-83/TI-84/TI-89 Calculators - Great for your Accident Reconstruction Equations!
Do you have a Texas Instruments 83+, 84+, or 89 Titanium calculator? Over 60 calculations and equations performed; similar to the Excel Calculator, but with the portability you can take to a crash scene or have in the courtroom. Fifty ($50) dollars for just the programs if you currently own a TI-83/84/89 Calculator and have the TI-Graph Link Cable to connect it to your computer. The programs are typically emailed, but can be sent to you on a CD upon request. If you currently do not own one of these calculators, I can send a brand new one to you that's already been programmed, including the TI-Graph Link Cable and instructional manual, and includes all tax, shipping, insurance charges, all for one price listed above.

The differences between the three TI calculators are the operating speed, available memory, and amount of preloaded TI applications. In addition, the TI-84+ and TI-89 Titanium have built in USB ports with cable compared to the TI-83+. The Accident Equation Programs also work on the Voyage 200 TI calculator. Please call or email TCS direct to order the programs for the 200. If you have an equation(s) that you need specific to your work or business, call TCS and I can program your calculator to fit your needs.

To see more of a comparison between calculators, download the TI Graphing Calculator Comparison Chart. You will need to have Adobe Reader on your computer to view this file - download the FREE Acrobat Reader if you do not have it. It's very quick and easy.

To purchase see the price table above.

Contact us for more information about these calculators or to purchase one.

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Forensic Accident Reconstructionists of Oregon
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