Handy distance chart, for when you’re too dizzy to do math.

 

Laps Miles Kilometers
1 3.2 5.1
2 6.4 10.3
3 9.6 15.4
4 12.8 20.6
5 16 25.7 Half marathon on steroids
6 19.2 30.9
7 22.4 36.0
8 25.6 41.2
9 28.8 46.3 Marathon, not as many steroids
10 32 51.5 50K, even fewer steroids
11 35.2 56.6
12 38.4 61.8
13 41.6 66.9
14 44.8 72.1
15 48 77.2
16 51.2 82.4
17 54.4 87.5
18 57.6 92.7
19 60.8 97.8
20 64 103.0 100K
21 67.2 108.1
22 70.4 113.3
23 73.6 118.4
24 76.8 123.6
25 80 128.7
26 83.2 133.9
27 86.4 139.0
28 89.6 144.2
29 92.8 149.3
30 96 154.5
31 99.2 159.6
32 102.4 164.8 It’s been done before. 😉
 
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