Convert between speed units
Our Speed Converter is a velocity conversion tool that translates speed rates across automotive, scientific, maritime, and aerospace measurement scales. It supports Miles Per Hour (mph), Kilometers Per Hour (km/h), Meters Per Second (m/s), Knots (nautical miles per hour), and Feet Per Second (ft/s). Operating on exact international standards ($1\text{ mph} = 1.609344\text{ km/h}$, $1\text{ m/s} = 3.6\text{ km/h}$, $1\text{ knot} = 1.852\text{ km/h}$), the converter provides instantaneous, verified velocity translations for motorists driving abroad, pilots, sailors, meteorologists, and physics students.
Certified international conversion constants (1 mph = 1.609344 km/h; 1 knot = 1.852 km/h)
Simultaneous multi-unit output displays conversions across automotive, nautical, and SI units
High floating-point precision eliminates rounding errors in physics and navigation calculations
100% free with instant in-browser evaluations and zero network delay
No registration or software downloads required—works seamlessly on all web browsers
Clean, intuitive interface designed for rapid lookup on mobile phones while traveling
1. Enter the speed value into the input field. 2. Select the starting speed unit (e.g., MPH, KM/H, Knots, M/S). 3. Choose your desired target unit. 4. Review the converted velocity and the mathematical conversion factor shown below the result.
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