To run a half marathon in 1:45, hold 8'01" per mile, i.e. 7.49 mph (4'59"/km). At that pace: 5K in 24'53", 10K in 49'46", half marathon in 1h45'00", marathon in 3h30'00".
Half marathon in 1:45: 8'01"/mile
1 track lap = 1'59"4
1 track lap = 1'59"4
To run a half marathon in 1:45, hold 8'01" per mile, i.e. 7.49 mph (4'59"/km). At that pace: 5K in 24'53", 10K in 49'46", half marathon in 1h45'00", marathon in 3h30'00".