A 10K in 71 minutes means holding 7:06 per kilometre — 2:50 for each of the twenty-five laps of a 400 metre track, with halfway at 35:30. That is 11:26 per mile, or 8.45 km/h. Seventy-one minutes is a good time at which to separate race effort from training effort. Almost all of your running should ...
COMMON TARGETS
YOU NEED TO HOLD
7:06 / km
PER MILE
11:26
PER LAP × 25
2:50
HALFWAY
35:30
8.45 km/h, 5.25 mph. On a track that is 2:50 for twenty-five laps with nothing left over — a 10K starts and finishes on the same line.
KILOMETRE SPLITS — EVEN PACE
1 km
lap 2.5
7:06
2 km
lap 5
14:12
3 km
lap 7.5
21:18
4 km
lap 10
28:24
5 km
halfway
35:30
6 km
lap 15
42:36
7 km
lap 17.5
49:42
8 km
lap 20
56:48
9 km
lap 22.5
1:03:54
10 km
finish
1:11:00
THE HALFWAY DECISION
GO THROUGH 5 KM IN
35:30 (even)
First 5 km
35:30 · 7:06 /km
Then you must run
35:30 · 7:06 /km
An even split — both halves at the same pace, which is how most 10K personal bests are actually run.
Time banked early is not saved, only moved. Both runners above cross the line at exactly 1:11:00 — the arithmetic guarantees it. What changes is where the effort sits, and a first half run 30 seconds fast almost never produces a second half only 30 seconds slow. That asymmetry, not the arithmetic, is why the even line wins.
WHAT THIS SUGGESTS ELSEWHERE
5K
34:03 · 6:49 /km
Half marathon
2:36:39 · 7:26 /km
Marathon
5:26:37 · 7:44 /km
Mile
10:14 · 6:22 /km
Riegel's model. Note the 5K figure — your 10K pace is roughly 0:17 per kilometre slower than your 5K pace, which is the usual gap between the two distances.
This page opens with a 1:11:00 target already set, so the pace, splits and halfway plan are the ones for a 71 minute 10K.
Read the pace panel: 7:06 per kilometre, 2:50 per lap, 11:26 per mile, halfway at 35:30.
Use the kilometre splits as a race sheet — they are cumulative, so they are what the clock should read at each marker.
Move the halfway slider to see what any 5 km split commits you to. The two halves always add to your target.
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Last updated: July 28, 2026 · Formula verified · Eagle-eyed accuracy for every calculation.