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About This Tool
Speed Converter converts between kilometres per hour, miles per hour, metres per second, knots, and feet per second. Speed units vary by context — road signs use mph or km/h, aviation and maritime use knots, and physics uses m/s.
Misreading speed units has caused real accidents and navigation errors. Converting correctly is especially important for aviation, shipping, and any context where safety depends on precise speed values.
Tip: One knot equals one nautical mile per hour, approximately 1.852 km/h or 1.151 mph. Nautical miles and knots are defined relative to Earth's latitude lines, which is why they are used in navigation rather than arbitrary land-based units.