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According to Google's calculator, 400 knots equals 460.311779 miles per hour, based on the rate that 1 knot is equal to 1.15077945 mph. http://www.google.com/search?source=ig&hl=en&rlz=&q=400+knots+to+mph&aq=f

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15y ago
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14y ago

400 knots = 460.3 mph

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Q: How many mph equal 400 knots?
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