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Speed Converter
Free online speed converter. Convert km/h to mph, m/s, knots and more instantly.
Result
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Convert any speed unit instantly. Kilometers per hour to miles per hour, meters per second to knots — all speed conversions in one place.
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FREQUENTLY ASKED QUESTIONS
How many mph is 100 km/h?
100 km/h equals 62.14 mph.
What is the speed of light?
The speed of light is 299,792,458 meters per second, or about 670,616,629 mph.
What is a knot?
A knot is one nautical mile per hour, equal to 1.852 km/h or 1.151 mph. Used in aviation and maritime navigation.
What is Mach 1?
Mach 1 is the speed of sound, approximately 343 m/s or 1,235 km/h at sea level.