How many km is 20 nmi?
20 nmi = 37.04 km
It is 37.04 km, so saying 37 km is fine — rounding is within 0.5%.
And how many nmi is 20 km?
20 km = 10.799 nmi
Formula: km = nmi × 1.852
nmi to km around this value
2 nmi3.704km
4 nmi7.408km
6 nmi11.112km
8 nmi14.816km
10 nmi18.52km
12 nmi22.224km
14 nmi25.928km
16 nmi29.632km
18 nmi33.336km
20 nmi37.04km
22 nmi40.744km
24 nmi44.448km
26 nmi48.152km
28 nmi51.856km
30 nmi55.56km
32 nmi59.264km
34 nmi62.968km
36 nmi66.672km
38 nmi70.376km
40 nmi74.08km