4'10"/km = 14.40 km/h · 8.95 mph

1 track lap = 1'40"0

At 4'10" per kilometre you run 14.40 km/h, or 8.95 mph (6'42"/mile). 5K in 20'50", 10K in 41'40", half marathon in 1h27'54", marathon in 2h55'49".