The number of steps per mile is typically between 1,900 and 2,500 for walkers using a pedometer. The number varies naturally due to differences in stride length, speed and incline.
Since the number of steps per mile varies for everyone and is dependent on many external factors such as stride length and slope, you can determine your own personal average steps per mile. Count the number of steps you take for 1 mile, repeat this several times and average your results. Keeping your speed consistent is key; your stride length is longer when you jog, so your step count is different for walking the same distance.