12.9km/h, my running speed on 4.3km 20:00

Time equivalence by distance

1km	2km	5km	10km
04:39	09:18	23:15	46:31
15km	20km	Half Marathon	Marathon
1:09:46	1:33:01	1:38:08	3:16:15

Split by km

km	Time/km
1 km	04:39
2 km	09:18
3 km	13:57
4 km	18:36
0.3 km	20:00

Calculate your running speed

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