A pace of 6:40/mi is 4:09/km, or 14.5 km/h (9.0 mph). At that pace you finish a 5K in 20:43, a 10K in 41:25, a half marathon in 1:27:24 and a marathon in 2:54:48.
Try it at another distance
10K finish times around your target, in 5 seconds steps
Change
Time
Pace
−0:20
39:21
3:566:20
−0:15
39:52
3:596:25
−0:10
40:23
4:026:30
−0:05
40:54
4:056:35
Your target
/mi
+0:05
41:57
4:126:45
+0:10
42:28
4:156:50
+0:15
42:59
4:186:55
+0:20
43:30
4:217:00
Arrow keys nudge the value. Hold Shift for bigger steps.
Finish times at 6:40 per mile
Finish time at this pace for each distance
Distance
Finish time
1K
4:09
1 mile
6:40
5K
20:43
10K
41:25
10 miles
1:06:40
Half marathon
1:27:24
Marathon
2:54:48
50K
3:27:07
Splits
Splits per km
km
Split
Elapsed
1
4:09
4:09
2
4:09
8:17
3
4:09
12:26
4
4:09
16:34
5
4:09
20:43
6
4:09
24:51
7
4:09
29:00
8
4:09
33:08
9
4:09
37:17
10
4:09
41:25
Splits per mile
Mile
Split
Elapsed
1
6:40
6:40
2
6:40
13:20
3
6:40
20:00
4
6:40
26:40
5
6:40
33:20
6
6:40
40:00
Final 0.214 mi
1:25
41:25
Equivalent times at other distances
Estimate
Estimated times at other distances (Riegel formula)
Distance
Estimated time
5K
19:52
10 miles
1:08:36
Half marathon
1:31:24
Marathon
3:10:34
These are estimates from the Riegel formula, T2 = T1 × (D2 ÷ D1)^1.06. They assume you’ve trained for the other distance, so treat them as a guide, not a promise.
10K 41:25
km4:09/km
14:09
28:17
312:26
416:34
520:43
624:51
729:00
833:08
937:17
1041:25
mi6:40/mi
16:40
213:20
320:00
426:40
533:20
640:00
6.2141:25
Pace questions runners ask
How long is a marathon at 6:40/mi?
At 6:40/mi a marathon takes 2:54:48 and a half marathon 1:27:24.