Skip to main content
Calcimator

Wind Speed Converter

Convert wind speed between mph, km/h, m/s, and knots. See Beaufort scale rating and wind description.

Convert

Results

Miles per Hour
15 mph
Kilometers per Hour
24.14 km/h
Meters per Second
6.71 m/s
Knots
13.03 knots
Beaufort Scale
4
Wind Description
Moderate Breeze
How to Use This Calculator
  1. Enter your wind speed value in any one of the four input fields: mph, km/h, m/s, or knots.
  2. Review equivalent wind speed values in all other units simultaneously.
  3. Check the Beaufort Scale number and Wind Description (calm, light breeze, gale, hurricane, etc.).

How the result changes with Wind Speed (mph)

Wind Speed (mph)Miles per HourKilometers per HourBeaufort Scale
66 mph9.66 km/h2
2121 mph33.8 km/h5
3939 mph62.76 km/h8
5454 mph86.9 km/h9

What each input means

Wind Speed (mph)
Miles per hour
Wind Speed (km/h)
Kilometers per hour
Wind Speed (m/s)
Meters per second
Wind Speed (knots)
Knots

How this is calculated

Formula

1 mph = 1.60934 km/h = 0.44704 m/s = 0.868976 knots

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Wind Speed (mph) = 15, Wind Speed (km/h) = 0, Wind Speed (m/s) = 0, Wind Speed (knots) = 0 = 4 input(s) provided
  2. Calculate Miles per Hour
    15 = 15
  3. Calculate Kilometers per Hour
    24.1401 = 24.1401
  4. Calculate Beaufort Scale
    Beaufort Scale
    4 = 4
  5. Calculate Meters per Second
    6.705588884815864 = 6.705588884815864
  6. Calculate Knots
    Knots = speedKnots
    13.03463737638819 = 13.03463737638819

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.

Related Calculators

The questions that sit next to this one — chosen by subject, including calculators filed under a different category.

Weather & Climate

Wind Chill Calculator

Calculate the wind chill temperature using the official NWS formula. Assess frostbite risk based on conditions.

Weather & Climate

Heat Index Calculator

Calculate the heat index (feels-like temperature) based on air temperature and humidity. Assess heat danger level.

Unit Conversions

Speed Converter

Convert between mph, km/h, m/s, knots, and feet per second instantly.

Weather & Climate

Dew Point Calculator

Calculate the dew point temperature from air temperature and relative humidity. Includes comfort level assessment and frost risk.

More in Environment, Weather & Climate.