💨 Wind Speed Knots to MPH Converter
Convert knots to mph, km/h & m/s — with Beaufort scale classification, aviation & marine categories
| Force | Description | Knots | MPH | km/h | m/s | Marine Conditions |
|---|---|---|---|---|---|---|
| 0 | Calm | <1 | <1 | <1 | 0–0.2 | Sea like mirror |
| 1 | Light Air | 1–3 | 1–3 | 1–5 | 0.3–1.5 | Ripples, no foam crests |
| 2 | Light Breeze | 4–6 | 4–7 | 6–11 | 1.6–3.3 | Small wavelets, glassy crests |
| 3 | Gentle Breeze | 7–10 | 8–12 | 12–19 | 3.4–5.4 | Large wavelets, crests begin to break |
| 4 | Moderate Breeze | 11–16 | 13–18 | 20–28 | 5.5–7.9 | Small waves, frequent whitecaps |
| 5 | Fresh Breeze | 17–21 | 19–24 | 29–38 | 8.0–10.7 | Moderate waves, many whitecaps |
| 6 | Strong Breeze | 22–27 | 25–31 | 39–49 | 10.8–13.8 | Large waves, whitecaps everywhere |
| 7 | Near Gale | 28–33 | 32–38 | 50–61 | 13.9–17.1 | Sea heaps up, foam in streaks |
| 8 | Gale | 34–40 | 39–46 | 62–74 | 17.2–20.7 | Moderately high waves, spindrift |
| 9 | Strong Gale | 41–47 | 47–54 | 75–88 | 20.8–24.4 | High waves, dense foam streaks |
| 10 | Storm | 48–55 | 55–63 | 89–102 | 24.5–28.4 | Very high waves, sea surface white |
| 11 | Violent Storm | 56–63 | 64–72 | 103–117 | 28.5–32.6 | Exceptionally high waves |
| 12 | Hurricane Force | 64+ | 74+ | 118+ | 32.7+ | Air filled with foam and spray |
| Category | Knots | MPH | km/h | Typical Damage |
|---|---|---|---|---|
| Tropical Depression | <34 | <39 | <63 | Minimal — trees, power lines |
| Tropical Storm | 34–63 | 39–73 | 63–118 | Some damage to structures |
| Category 1 | 64–82 | 74–95 | 119–153 | Minor damage, tree branches |
| Category 2 | 83–95 | 96–110 | 154–177 | Moderate — roof/door damage |
| Category 3 | 96–112 | 111–129 | 178–208 | Extensive — major structural damage |
| Category 4 | 113–136 | 130–156 | 209–251 | Extreme — total roof failure possible |
| Category 5 | 137+ | 157+ | 252+ | Catastrophic — total destruction |
| Condition | Knots | MPH | km/h | Impact |
|---|---|---|---|---|
| Calm / Light Winds | 0–9 | 0–10 | 0–17 | Normal operations |
| Light Crosswind | 10–15 | 12–17 | 18–28 | Minor correction needed |
| Moderate Crosswind | 16–25 | 18–29 | 30–46 | Technique adjustment required |
| Strong Crosswind | 26–35 | 30–40 | 48–65 | Advanced technique, may divert |
| Turbulence — Light | 10–20 | 12–23 | 18–37 | Slight erratic changes in altitude |
| Turbulence — Moderate | 21–40 | 24–46 | 39–74 | Unsecured items dislodged |
| Jet Stream (typical) | 100–150 | 115–173 | 185–278 | Significant route impact |
| Record Jet Stream | 200+ | 230+ | 370+ | Rare extreme event |
| Warning Level | Knots | MPH | km/h | Advisory Action |
|---|---|---|---|---|
| Small Craft Advisory | 21–33 | 24–38 | 39–61 | Small craft stay in port |
| Gale Warning | 34–47 | 39–54 | 63–87 | Dangerous conditions at sea |
| Storm Warning | 48–63 | 55–72 | 89–117 | Life-threatening conditions |
| Hurricane Warning | 64+ | 74+ | 119+ | All vessels seek shelter |
| Dense Fog Advisory | — | — | — | Visibility under 0.25 nm |
Fast conversion of wind speed are a lot useful, when you requires it urgently. Being able immediately alter values between units as knots, Beaufort, m/s and km/h to others help a lot. The wind speed converter converts six different units simultaneously.
For use it, enter number in the field and click the button of conversion, or simply press Enter either the tab. This calculator estimates windy pace, convert knots to mph according to special formula and use conversion chart. It also addresses distances, for example the nautical mile.
How to Convert Wind Speed Quickly
Tables about conversions and impacts of wind speed on ground and sea are available.
The converter applies precise formulas. Wind in knots matches 0.8689762 times wind in mph. In knots it is also 0.5399568 times wind in km/h.
For receive knots, multiply wind in m/s by means of 1.9438445. For mph you can multiply km/h by means of 0.621371 or knots by means of 2.236937. It Is possible to also convert of feet each minute to mph.
For instance, 1 mph are 88 feet each minute, so 6500 feet each minute match 73.86 mph. The calculator considers also approximate impacts of terrain in countryside, suburbs and cities. They affect the real wind speed in gruntnivelon, that you knows in 10-metric height.
Wind speed one commonly measures by means of anemometer. It can be sorted by means of the old Beaufort scale, that bases on observed impacts of wind. You analyses it of one-hour average to 3-second and open-terrain PWS.
If wind speed of 28 m/s averaĝas above 10 minutes, you can convert it to 3-second gust. First estimate the factor of 10-min to 1-hour, that is 1.05. Later apply the factor of 3-sec to 1-hour, that is 1.51.
Like this 28 m/s above 10 minutes become 40.27 m/s or 90 mph. Projected wind speed show 10-knot range. For instance, 15 knots imply pace between 10 and 20 knots.
Wind gusts are circa half stronger than the average pace. If project 30 knots, gusts can reach 45 knowts.
