Wind Speed Converter — Knots, MPH, km/h & Beaufort Scale

Enter a wind speed in any unit to see knots, mph, km/h, m/s, ft/s, and the Beaufort force with description.

—Knots
—mph
—km/h
—m/s
—ft/s
—Beaufort force
—Description
How this conversion works. Linear conversions use the exact knot definition (1.852 km/h); the Beaufort force is a band lookup per the NOAA National Weather Service — Beaufort Scale.

How to use

  1. Enter the wind speed value.
  2. Pick its unit — knots, mph, km/h, m/s, or ft/s.
  3. Read every equivalent plus the Beaufort force and description.

Frequently asked questions

How many mph is a knot?

One knot is one nautical mile per hour: exactly 1.852 km/h, about 1.15078 mph and 0.51444 m/s.

What is the Beaufort scale?

A 0–12 scale mapping wind speed to observed effects, from calm (force 0, under 1 knot) to hurricane force (12, 64+ knots). The bands here follow the NOAA National Weather Service table.

At what wind speed should small boats be careful?

NWS issues small-craft advisories around 22–33 knots (force 6–7). Force 8 (34+ knots) is gale force.

Is my data sent to a server?

No. Conversion and Beaufort lookup run entirely in your browser.

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