Knots to MPH Conversion
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Updated
1 knot = 1.15078 mph = 1.852 km/h. A knot is one nautical mile per hour — the unit for wind, marine and aviation speeds. Convert below.
Knots → MPH
Type any value — every unit updates below
1 Knots = 1.151 MPH
Result
1.151 MPH
1 Knots = 1.151 MPH
1 Knots in every unit
| Knots | MPH |
|---|---|
| 1 Knots | 1.151 MPH |
| 5 Knots | 5.754 MPH |
| 10 Knots | 11.508 MPH |
| 20 Knots | 23.016 MPH |
| 30 Knots | 34.523 MPH |
| 34 Knots | 39.127 MPH |
| 48 Knots | 55.238 MPH |
| 64 Knots | 73.65 MPH |
| 90 Knots | 103.57 MPH |
| 120 Knots | 138.094 MPH |
Upper bound of each IMD category in knots. Multiply by 1.15 for mph, 1.852 for km/h. IS 875 Part 3 sets design wind speeds of 39–55 m/s across India — that's 76–107 knots.
Knots to mph chart (with cyclone context)
| Knots | MPH | km/h | IMD classification |
|---|---|---|---|
| 1 | 1.15 | 1.85 | — |
| 10 | 11.5 | 18.5 | Light breeze |
| 20 | 23.0 | 37.0 | Fresh breeze |
| 28–33 | 32–38 | 52–61 | Deep depression |
| 34–47 | 39–54 | 63–87 | Cyclonic storm |
| 48–63 | 55–72 | 89–117 | Severe cyclonic storm |
| 64–89 | 74–102 | 119–165 | Very severe cyclonic storm |
| 90–119 | 104–137 | 167–220 | Extremely severe |
| 120+ | 138+ | 222+ | Super cyclone |
Why wind matters to builders
IS 875 Part 3 wind zones set design wind speeds for structures (39–55 m/s basic wind speed across India — that's 76–107 knots). Coastal projects in cyclone zones (Odisha, AP, TN, Gujarat coasts) carry higher design pressures for roofs, cladding and hoardings — wind speed is the input that sizes them.
Frequently asked questions
How many mph is 1 knot? 1.15078 mph (1.852 km/h exactly).
Why do weather reports use knots? The knot comes from marine navigation (one nautical mile — one minute of latitude — per hour) and remains the international standard for wind, sea and air speeds.
What wind speed is a cyclone? IMD classifies a cyclonic storm from 34 knots (63 km/h) sustained; a super cyclone exceeds 120 knots (222 km/h).
How do I convert knots to km/h? Multiply by 1.852.
Related converters
CivilSite Editorial Team✓ Engineer reviewed
Written and reviewed by practising civil engineers with 10+ years of Indian residential construction experience.