12.75km/h, my running speed on 8.5km 40:00

Time equivalence by distance

1km	2km	5km	10km
04:42	09:25	23:32	47:04
15km	20km	Half Marathon	Marathon
1:10:35	1:34:07	1:39:17	3:18:34

Split by km

km	Time/km
1 km	04:42
2 km	09:25
3 km	14:07
4 km	18:49
5 km	23:32
6 km	28:14
7 km	32:56
8 km	37:39
0.5 km	39:60

Calculate your running speed

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