 const float WHEEL_RADIUS = 6.0; // in cm
 const float WHEEL_CIRCUMFERENCE = 2 * WHEEL_RADIUS * PI;
 double kph = 0.0;
+double mph = 0.0;
 
 // Hall effect sensor read pin, make it an interrupt pin so we catch all revolutions
 const byte HALL_SENSOR = 2;

  lcd.clear();
  
  kph = calculateKPH();
  
  lcd.print("Spd: ");
  lcd.print(kph);
  lcd.print("kph");
  
  lcd.setCursor(0,1);
  lcd.print("AccY:");

  currentMillis = millisSinceLastTick;
  return cmps/10000 *360;
}

double calculateMPH() {
   return kph * 1.6093;
}
