Knots to Mph Converter
Convert knots to miles per hour instantly. Free knots to mph converter for aviation and maritime.
Formula
mph = knots x 1.15078
Common Conversions
How to Convert Knots to MPH
1 knot = 1.151 mph. Multiply knots by 1.151 (or 1.15 for quick mental). So 30 knots × 1.151 = 34.5 mph. The knot is the standard speed unit for marine and aviation - 1 knot is exactly 1 nautical mile per hour, and 1 nautical mile = 1.151 statute miles.
Used for sailing, marine weather, aviation. A storm with 50 knot winds = 57.6 mph (severe gale). 100 knots = 115 mph (most aircraft cruise speed). Hurricane categories use knots: Cat 1 (74-95 mph) = 64-82 knots, Cat 5 (157+ mph) = 137+ knots.
Common Knots to MPH
| Knots | MPH |
|---|---|
| 1 knot | 1.15 mph |
| 10 knots | 11.51 mph |
| 20 knots | 23.02 mph |
| 30 knots | 34.52 mph |
| 40 knots | 46.03 mph |
| 50 knots | 57.54 mph |
| 75 knots | 86.30 mph |
| 100 knots | 115.08 mph |
Frequently Asked Questions
Why use knots instead of mph?
Maritime and aviation tradition. 1 knot = 1 nautical mile/hour, where the nautical mile is 1 minute of latitude at the equator (1,852 m). This makes the unit naturally aligned with navigation - useful when working with ocean charts or great-circle aviation routes.
What's a typical sailboat speed?
Cruising sailboats: 5-7 knots typical (5.7-8 mph). Racing boats: 8-12 knots. The 'hull speed' for displacement boats: roughly 1.34 × sqrt(waterline length in feet). A 32-foot waterline boat: 1.34 × √32 = 7.6 knots = 8.7 mph.
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