12.64km/h, my running speed on 4.2km 19:56

Time equivalence by distance

1km	2km	5km	10km
04:45	09:30	23:44	47:28
15km	20km	Half Marathon	Marathon
1:11:11	1:34:55	1:40:08	3:20:16

Split by km

km	Time/km
1 km	04:45
2 km	09:30
3 km	14:14
4 km	18:59
0.2 km	19:56

Calculate your running speed

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