Category · 32 tools
Speed Conversion.
Convert between MPH, KPH, meters per second, feet per second, knots, and Mach speed units.
Convert between miles per hour, kilometers per hour, meters per second, knots, Mach, and more. These converters cover everyday driving speeds, aviation, nautical navigation, and scientific measurements.
Popular Conversions
Feet per Second to Knots Converter
Free online feet per second to knots converter
Feet per Second to KPH Converter
Free online feet per second to kph converter
Feet per Second to Mach Converter
Free online feet per second to mach converter
Feet per Second to Meters per Second Converter
Free online feet per second to meters per second converter
Feet per Second to MPH Converter
Free online feet per second to mph converter
Knots to Feet per Second Converter
Free online knots to feet per second converter
Knots to KPH Converter
Free online knots to kph converter
Knots to Mach Converter
Free online knots to mach converter
Knots to Meters per Second Converter
Free online knots to meters per second converter
Knots to MPH Converter
Free online knots to mph converter
KPH to Feet per Second Converter
Free online kph to feet per second converter
KPH to Knots Converter
Free online kph to knots converter
KPH to Mach Converter
Free online kph to mach converter
KPH to Meters per Second Converter
Free online kph to meters per second converter
KPH to MPH Converter
Free online kph to mph converter
Mach to Feet per Second Converter
Free online mach to feet per second converter
Mach to Knots Converter
Free online mach to knots converter
Mach to KPH Converter
Free online mach to kph converter
Mach to Meters per Second Converter
Free online mach to meters per second converter
Mach to MPH Converter
Free online mach to mph converter
Meters per Second to Feet per Second Converter
Free online meters per second to feet per second converter
Meters per Second to Knots Converter
Free online meters per second to knots converter
Meters per Second to KPH Converter
Free online meters per second to kph converter
Meters per Second to Mach Converter
Free online meters per second to mach converter
Meters per Second to Miles per Hour Converter
Free online meters per second to miles per hour converter
Meters per Second to MPH Converter
Free online meters per second to mph converter
Miles per Hour to Meters per Second Converter
Free online miles per hour to meters per second converter
MPH to Feet per Second Converter
Free online mph to feet per second converter
MPH to Knots Converter
Free online mph to knots converter
MPH to KPH Converter
Free online mph to kph converter
MPH to Mach Converter
Free online mph to mach converter
MPH to Meters per Second Converter
Free online mph to meters per second converter
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Speed and velocity conversions
The US uses miles per hour while most of the world uses kilometers per hour. The conversion is straightforward: multiply MPH by 1.609 to get KPH. Aviation and maritime industries use knots (1 knot = 1.151 MPH), and aerospace engineering uses Mach numbers relative to the speed of sound.
Common questions about speed conversions
How do I convert MPH to KPH?
Multiply MPH by 1.609 to get KPH. For example, 60 MPH equals about 96.6 KPH, and 100 MPH equals 160.9 KPH. To convert the other way, divide KPH by 1.609 or multiply by 0.6214. A 100 KPH speed limit is about 62 MPH.
What is a knot?
A knot is one nautical mile per hour, which equals 1.151 MPH or 1.852 KPH. The name comes from the old method of measuring ship speed by counting knots on a rope as it unwound over a set time. Knots are standard in aviation and maritime navigation worldwide.
What is Mach 1 in MPH?
Mach 1 is the speed of sound, approximately 767 MPH (1,235 KPH) at sea level and 68°F (20°C). The exact speed changes with temperature and altitude. At cruising altitude (35,000 feet), the speed of sound drops to about 660 MPH because the air is colder.