Convert 21 Miles to Nautical Miles

How long is 21 miles? How far is 21 miles in nautical miles? 21 mi to nmi conversion.
Amount
From
To
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21 Miles ≈
18.248501 Nautical Miles
result rounded
Decimal places
Result in Plain English
21 miles is equal to about 18.2 nautical miles.
In Scientific Notation
21 miles
= 2.1 x 101 miles
≈ 1.82485 x 101 nautical miles
Miles
A mile is a unit of distance equal to 5,280 feet or exactly 1.609344 kilometers. It is commonly used to measure the distance between places in the United States and United Kingdom.
Abbreviation: mi
Nautical Miles
A nautical mile is a unit of length equal to exactly 1,852 meters. It was originally based on one minute (1/60th) of a degree of latitude.
Common abbreviations: nmi, NM, nm
Miles to Nautical Miles Conversions
results may be rounded
mi nmi
21.00 18.249
21.01 18.257
21.02 18.266
21.03 18.275
21.04 18.283
21.05 18.292
21.06 18.301
21.07 18.309
21.08 18.318
21.09 18.327
21.10 18.335
21.11 18.344
21.12 18.353
21.13 18.361
21.14 18.370
21.15 18.379
21.16 18.388
21.17 18.396
21.18 18.405
21.19 18.414
21.20 18.422
21.21 18.431
21.22 18.440
21.23 18.448
21.24 18.457
21.25 18.466
21.26 18.474
21.27 18.483
21.28 18.492
21.29 18.501
21.30 18.509
21.31 18.518
21.32 18.527
21.33 18.535
mi nmi
21.34 18.544
21.35 18.553
21.36 18.561
21.37 18.570
21.38 18.579
21.39 18.587
21.40 18.596
21.41 18.605
21.42 18.613
21.43 18.622
21.44 18.631
21.45 18.640
21.46 18.648
21.47 18.657
21.48 18.666
21.49 18.674
21.50 18.683
21.51 18.692
21.52 18.700
21.53 18.709
21.54 18.718
21.55 18.726
21.56 18.735
21.57 18.744
21.58 18.753
21.59 18.761
21.60 18.770
21.61 18.779
21.62 18.787
21.63 18.796
21.64 18.805
21.65 18.813
21.66 18.822
21.67 18.831
mi nmi
21.68 18.839
21.69 18.848
21.70 18.857
21.71 18.865
21.72 18.874
21.73 18.883
21.74 18.892
21.75 18.900
21.76 18.909
21.77 18.918
21.78 18.926
21.79 18.935
21.80 18.944
21.81 18.952
21.82 18.961
21.83 18.970
21.84 18.978
21.85 18.987
21.86 18.996
21.87 19.005
21.88 19.013
21.89 19.022
21.90 19.031
21.91 19.039
21.92 19.048
21.93 19.057
21.94 19.065
21.95 19.074
21.96 19.083
21.97 19.091
21.98 19.100
21.99 19.109
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