A pace of 8:20/mi is 5:11/km, or 11.6 km/h (7.2 mph). At that pace you finish a 5K in 25:53, a 10K in 51:47, a half marathon in 1:49:15 and a marathon in 3:38:29.
Try it at another distance
10K finish times around your target, in 5 seconds steps
Change
Time
Pace
−0:20
49:43
4:588:00
−0:15
50:14
5:018:05
−0:10
50:45
5:048:10
−0:05
51:16
5:088:15
Your target
/mi
+0:05
52:18
5:148:25
+0:10
52:49
5:178:30
+0:15
53:20
5:208:35
+0:20
53:51
5:238:40
Arrow keys nudge the value. Hold Shift for bigger steps.
Finish times at 8:20 per mile
Finish time at this pace for each distance
Distance
Finish time
1K
5:11
1 mile
8:20
5K
25:53
10K
51:47
10 miles
1:23:20
Half marathon
1:49:15
Marathon
3:38:29
50K
4:18:54
Splits
Splits per km
km
Split
Elapsed
1
5:11
5:11
2
5:11
10:21
3
5:11
15:32
4
5:11
20:43
5
5:11
25:53
6
5:11
31:04
7
5:11
36:15
8
5:11
41:25
9
5:11
46:36
10
5:11
51:47
Splits per mile
Mile
Split
Elapsed
1
8:20
8:20
2
8:20
16:40
3
8:20
25:00
4
8:20
33:20
5
8:20
41:40
6
8:20
50:00
Final 0.214 mi
1:47
51:47
Equivalent times at other distances
Estimate
Estimated times at other distances (Riegel formula)
Distance
Estimated time
5K
24:50
10 miles
1:25:45
Half marathon
1:54:15
Marathon
3:58:12
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 51:47
km5:11/km
15:11
210:21
315:32
420:43
525:53
631:04
736:15
841:25
946:36
1051:47
mi8:20/mi
18:20
216:40
325:00
433:20
541:40
650:00
6.2151:47
Pace questions runners ask
How long is a marathon at 8:20/mi?
At 8:20/mi a marathon takes 3:38:29 and a half marathon 1:49:15.