44 minute (= 5 miles-ish) on Treadmill

I hopped on the treadmill for 44 minutes today which, if I were doing 8:30 miles, would work out to roughly 5 miles. If I go by the calibrated 13.1% adjustment, I ran at a treadmill setting of 6, which equates to 10 minute miles uncalibrated, or 8:51 calibrated. 5 miles at 8:51 = 44:15 minutes -- close enough. The odometer said I ran 4.25 miles.