A pace of 12:40/mi is 7:52/km, or 7.6 km/h (4.7 mph). At that pace you finish a 5K in 39:21, a 10K in 1:18:42, a half marathon in 2:46:03 and a marathon in 5:32:06.
Try it at another distance
10K finish times around your target, in 5 seconds steps
Change
Time
Pace
−0:20
1:16:38
7:4012:20
−0:15
1:17:09
7:4312:25
−0:10
1:17:40
7:4612:30
−0:05
1:18:11
7:4912:35
Your target
/mi
+0:05
1:19:13
7:5512:45
+0:10
1:19:45
7:5812:50
+0:15
1:20:16
8:0212:55
+0:20
1:20:47
8:0513:00
Arrow keys nudge the value. Hold Shift for bigger steps.
Finish times at 12:40 per mile
Finish time at this pace for each distance
Distance
Finish time
1K
7:52
1 mile
12:40
5K
39:21
10K
1:18:42
10 miles
2:06:40
Half marathon
2:46:03
Marathon
5:32:06
50K
6:33:32
Splits
Splits per km
km
Split
Elapsed
1
7:52
7:52
2
7:52
15:44
3
7:52
23:37
4
7:52
31:29
5
7:52
39:21
6
7:52
47:13
7
7:52
55:06
8
7:52
1:02:58
9
7:52
1:10:50
10
7:52
1:18:42
Splits per mile
Mile
Split
Elapsed
1
12:40
12:40
2
12:40
25:20
3
12:40
38:00
4
12:40
50:40
5
12:40
1:03:20
6
12:40
1:16:00
Final 0.214 mi
2:42
1:18:42
Equivalent times at other distances
Estimate
Estimated times at other distances (Riegel formula)
Distance
Estimated time
5K
37:45
10 miles
2:10:20
Half marathon
2:53:40
Marathon
6:02:04
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 1:18:42
km7:52/km
17:52
215:44
323:37
431:29
539:21
647:13
755:06
81:02:58
91:10:50
101:18:42
mi12:40/mi
112:40
225:20
338:00
450:40
51:03:20
61:16:00
6.211:18:42
Pace questions runners ask
How long is a marathon at 12:40/mi?
At 12:40/mi a marathon takes 5:32:06 and a half marathon 2:46:03.