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Wind Speed Converter

Type in a value (except Beaufort)  
kilometers per hour
meters per second
miles per hour 
feet per second
meters per minute
feet per minute


Beaufort (see below)

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Beaufort scale

Beaufort number Speed in knots Description Beschrijving Sea conditions Wave height in meter Land conditions
0 <1 Calm Stil Flat - Calm. Smoke rises vertically
1 1-3 Light air Zwakke wind Ripples without crests 0,0 Wind motion visible in smoke
2 4-6 Light breeze Zwakke wind Small wavelets. Crests of glassy appearance, not breaking 0,1 Wind felt on exposed skin. Leaves rustle
3 7-10 Gentle breeze Matige wind Large wavelets. Crests begin to break; scattered whitecaps 0,4 Leaves and smaller twigs in constant motion
4 11-16 Moderate breeze Matige wind Small waves 1 Dust and loose paper raised. Small branches begin to move
5 17-21 Fresh breeze Vrij krachtige wind Moderate (1.2 m) longer waves. Some foam and spray 2 Smaller trees sway
6 22-27 Strong breeze Krachtige wind Large waves with foam crests and some spray 3 Large branches in motion. Whistling heard in overhead wires. Umbrella use becomes difficult
7 28-33 Near gale Harde wind Sea heaps up and foam begins to streak 4 Whole trees in motion. Effort needed to walk against the wind
8 34-40 Gale Stormachtig Moderately high waves with breaking crests forming spindrift. Streaks of foam 5,5 Twigs broken from trees. Cars veer on road
9 41-47 Strong gale Storm High waves (2.75 m) with dense foam. Wave crests start to roll over. Considerable spray 7 Light structure damage
10 48--55 Storm Zware storm Very high waves. The sea surface is white and there is considerable tumbling. Visibility is reduced 9 Trees uprooted Considerable structural damage
11 56-63 Violent storm Zeer zware storm Exceptionally high waves 11,5 Widespread structural damage
12 >64 Hurricane Orkaan Huge waves. Air filled with foam and spray. Sea completely white with driving spray. Visibility very greatly reduced 14+ Considerable and widespread damage to structures