i believe it is four laps. But it all depends on what type of tredmill you have.
6
6
20 laps.
The treadmill instructions should specify the length of a "lap". A typical track-and-field track in the US (the sort you'd find circling a football field at an American high school) has a length of 440 yards, which is one quarter of a mile. Assuming the treadmill is using the same definition of a "lap", four such laps would constitute a mile.
32 laps
Well, 36 laps is 1 mile so 44 laps is 1.45 miles.
19 laps
about 2 and a three quarters laps.
nine miles
2 miles is 8 laps of a standard 400 meter track.
One lap is a quarter mile. This means that four laps equals one mile, which means that four miles equals sixteen laps. It is very easy to count how many miles different laps equal for - you just need to multiply the amount of miles by four and you get the amount of laps.