Convert 21 Miles per Hour to Knots

How fast is 21 miles per hour? What is 21 miles per hour in knots? 21 mph to knots conversion.

Amount

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21 Miles per Hour ≈

18.248501 Knots

result rounded

Decimal places

Result in Plain English

21 miles per hour is equal to about 18.2 knots.

In Scientific Notation

21 miles per hour

= 2.1 x 10¹ miles per hour

≈ 1.82485 x 10¹ knots

Miles per Hour

A mile per hour is a unit of speed commonly used in the United States. It is equal to exactly 1.609344 kilometers per hour.

Common abbreviations: mph, mi/h

Knots

A knot is a unit of speed, equal to one nautical mile per hour. Something traveling at one knot is going about 1.151 land miles per hour.

Common abbreviations: kn, kt

Miles per Hour to Knots Conversions

results may be rounded

mph	knots
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

mph	knots
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

mph	knots
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