Cape Horn ocean race voyage Whitbread Volvo Vendée Globe Velux international association Mike Perham

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Beaufort Scale Windspeed calculator
accepts input in any field
Beaufort:
Wind speed in Knots:
Wind speed in m/s:
Wind speed in km/h:
Wind speed in mph:

Beaufort kn m/s km/h
0 < 1 0 - 0.2 < 1
1 1 - 3 0.3 - 1.5 1 - 5
2 4 - 6 1.6 - 3.3 6 - 11
3 7 - 10 3.4 - 5.4 12 - 19
4 11 - 15 5.5 - 7.9 20 - 28
5 16 - 21 8.0 - 10.7 29 - 38
6 39 - 49 10.8 - 13.8 22 - 27
7 28 - 33 13.9 - 17.1 50 - 61
8 34 - 40 17.2 - 20.7 62 - 74
9 41 - 47 20.8 - 24.4 75 - 88
10 48 - 55 24.5 - 28.4 89 - 102
11 56 - 63 28.5 - 32.6 103 - 117
12 64 - 74 32.7 - 36.9 118 - 133
13 75 - 80 37.0 - 41.4 134 - 149
14 81 - 89 41.5 - 46.1 150 - 166
15 90 - 99 46.2 - 50.9 167 - 183
16 100 - 109 51.0 - 56.0 184 - 201
17 > 109 > 56.0 > 201

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