12.3km/h, my running speed on 4.1km 20:00

Time equivalence by distance

1km	2km	5km	10km
04:53	09:45	24:23	48:47
15km	20km	Half Marathon	Marathon
1:13:10	1:37:34	1:42:55	3:25:50

Split by km

km	Time/km
1 km	04:53
2 km	09:45
3 km	14:38
4 km	19:31
0.1 km	20:00

Calculate your running speed

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