Calculate running stride length by dividing the distance travelled by the number of steps required to travel. Run at a normal pace, and count the number of steps; stop when the desired number of steps is reached. Measure the distance travelled. Divide the distance travelled by the number of steps.
Calculating stride length is accomplished easily on a track or somewhere where the distance is known. For instance, on a quarter-mile track the straightaway is 100 meters or 328 feet, and the start and end point are clearly and precisely marked with straight lines. Use a pedometer or activity tracking device to help you count steps.