Speed Conversion Formula:
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Definition: This calculator converts speed measurements from knots (nautical miles per hour) to miles per hour (statute miles per hour).
Purpose: It helps mariners, aviators, and meteorologists convert between these common speed units used in navigation and weather reporting.
The calculator uses the formula:
Where:
Explanation: The conversion factor comes from the ratio of nautical miles (1,852 meters) to statute miles (1,609.344 meters).
Details: Accurate speed conversion is crucial for navigation, flight planning, weather forecasting, and when comparing speed measurements from different sources.
Tips: Simply enter the speed in knots. The calculator will automatically compute the equivalent speed in miles per hour.
Q1: Why are knots used instead of mph in aviation and maritime?
A: Knots are based on nautical miles which relate directly to latitude/longitude measurements, making them more practical for navigation.
Q2: How accurate is the conversion factor?
A: The factor 1.15078 is exact, based on international definitions of nautical and statute miles.
Q3: Can I convert mph back to knots?
A: Yes, divide mph by 1.15078 to get knots. We may add a reverse calculator in future updates.
Q4: What's a typical cruising speed in knots/mph?
A: Commercial jets cruise at about 450-500 knots (518-575 mph). Ships typically travel 20-25 knots (23-29 mph).
Q5: Why is the knot abbreviation "kt" sometimes used?
A: Both "kn" and "kt" are acceptable abbreviations for knots, with "kn" being the ISO standard.