A system for evaluating head injury uses instrumented helmets to transmit accelerometer readings to a computing system configured with machine readable code to determine angle and acceleration of impacts. The system has code to compare the angle and acceleration of the impact to thresholds and read at least one precomputed simulation result corresponding to entries near the impact in a database of precomputed head impact model simulations and for displaying interpolations from the precomputed simulation result. In particular embodiments, the simulation result includes strain on neural tracts. A method of evaluating an impact includes transmitting accelerometer readings from instrumented helmets or any other sensors to the computing system upon impact to the sensors determining at least angle and acceleration of the impact from the accelerometer readings reading at least one precomputed simulation result corresponding to an entry in the database nearest in angle and acceleration to the impact and displaying information from the simulation.
