6'10"/km = 9.73 km/h · 6.05 mph

1 track lap = 2'28"0

At 6'10" per kilometre you run 9.73 km/h, or 6.05 mph (9'55"/mile). 5K in 30'50", 10K in 1h01'40", half marathon in 2h10'06", marathon in 4h20'12".