Convert mile per hour to knot

Enter the value to convert from mile per hour to knot.

mph
kn
Result: 25 miles per hour (mph) = 21.7244060475 knots (kn)

How to Convert Mile per hour to Knot

Converting mile per hour to knot is straightforward using our conversion calculator.

Conversion Formula

kn = mph ÷ 1.15077944802

Reverse conversion: Convert knot to mile per hour

Comparison: Mile-per-hour vs Knot

When to Use Each Unit

Mile-per-hour: Primary speed unit in United States for transportation, weather, and general speed measurements.

Knot: International standard for maritime navigation, aviation, meteorology, and oceanography worldwide.

Common Conversion Values

  • 1 mph ≈ 1.609 km/h
  • 1 mph ≈ 0.447 m/s
  • 1 mph ≈ 1.467 ft/s
  • 1 mph ≈ 0.869 knots

About Mile

Definition: The mile per hour (symbol: mph) expresses speed as the number of miles traveled in one hour.

History: Developed with imperial measurement system and automotive era. Standard in United States and some Commonwealth countries.

Current Use: Primary speed unit in United States for transportation, weather, and general speed measurements.

Examples: City speed: 25-35 mph, highway: 55-80 mph, running: 6-15 mph, hurricane winds: 74+ mph

About Knot

Definition: The knot (symbol: kn) is a unit of speed equal to one nautical mile per hour, standard for maritime and aviation use.

History: Derived from ship navigation using knotted rope. One knot equals one nautical mile (1852 meters) per hour.

Current Use: International standard for maritime navigation, aviation, meteorology, and oceanography worldwide.

Examples: Ship cruising: 10-25 knots, aircraft: 150-500 knots, wind speed: 5-100+ knots, ocean currents: 1-5 knots

Popular speed conversions