6mph, my running speed on 1.5mi 15:00

Time equivalence by distance

1mi	2mi	5mi	10mi
10:00	20:00	50:00	1:40:00
15mi	20mi	Half Marathon	Marathon
2:30:00	3:20:00	2:11:05	4:22:11

Split by mi

mi	Time/mi
1 mi	10:00
0.5 mi	15:00

Calculate your running speed

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