Question 1

What pace do I need to run a sub 21 minutes 5K?

Accepted Answer

To finish a 5K (3.1 miles / 5 km) in under 21:00, you need to average 6:46 per mile — that's 4:12 per kilometer. The split table on this page shows the exact cumulative time to hit at every mile marker along the way.

Question 2

What are the mile splits for a sub 21 minutes 5K?

Accepted Answer

Running an even 6:46 per mile, you'd pass mile 1 at 6:46, reach halfway in about 10:30, and cross the finish line in 21:00. Prefer to finish faster than you start? Switch the calculator above to negative split to see per-mile targets that start slower and speed up.

Question 3

Is a sub 21 minutes 5K a good time?

Accepted Answer

Finishing a 5K in sub 21 minutes is a solid recreational result that reflects consistent training. Practicing 6:46 per mile in training — on tempo runs, race-pace intervals, and long runs — is the most direct way to make this goal feel routine on race day.

Mile-by-mile splits

Nearby goal times

Sub 21 minutes 5K FAQ