USTFCAA says the factor to conver a mile time to 1500m is 0.9259, however, mathematics says differently with .9321.
1 Mile = 1609.34 Meters
1500/1609.34 Meters = .9320591049747101
Mathematically, a 4:00.00 mile would mean the runner passed through at 3:43.69.
The USTFCAA factor takes an awful lot of time off. If we use their factor the runner who ran 4:00.00 for 1 mile ran the equivalent to 3:42.22.
Which is more correct?
Source:
http://www.ustfccca.org/assets/track-event-conversions-standardized.pdf