Speed Converter
unit-converter
Convert between m/s, km/s, km/h, mph, knots, fpm, fps, ips, cm/s, mm/s, Mach (ISA), Beaufort wind force, and speed of light c. Metric, imperial, and specialized scales. All Unit Conversions panel included.
Convert Speed
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All Unit Conversions
Dedicated converters (SI, imperial, navigation, aviation, wind scale, and relativistic units)
156 pages — every pair of units below, with fixed input/output, formulas, examples, and conversion tables.
- mps to kmps (Meter per Second to Kilometer per Second)
- mps to kph (Meter per Second to Kilometer per Hour)
- mps to mph (Meter per Second to Mile per Hour)
- mps to knots (Meter per Second to Knot)
- mps to fpm (Meter per Second to Foot per Minute)
- mps to fps (Meter per Second to Feet per Second)
- mps to ips (Meter per Second to Inch per Second)
- mps to cms (Meter per Second to Centimeter per Second)
- mps to mms (Meter per Second to Millimeter per Second)
- mps to mach (Meter per Second to Mach)
- mps to beaufort (Meter per Second to Beaufort)
- mps to c (Meter per Second to Speed of light (c))
- kmps to mps (Kilometer per Second to Meter per Second)
- kmps to kph (Kilometer per Second to Kilometer per Hour)
- kmps to mph (Kilometer per Second to Mile per Hour)
- kmps to knots (Kilometer per Second to Knot)
- kmps to fpm (Kilometer per Second to Foot per Minute)
- kmps to fps (Kilometer per Second to Feet per Second)
- kmps to ips (Kilometer per Second to Inch per Second)
- kmps to cms (Kilometer per Second to Centimeter per Second)
- kmps to mms (Kilometer per Second to Millimeter per Second)
- kmps to mach (Kilometer per Second to Mach)
- kmps to beaufort (Kilometer per Second to Beaufort)
- kmps to c (Kilometer per Second to Speed of light (c))
- kph to mps (Kilometer per Hour to Meter per Second)
- kph to kmps (Kilometer per Hour to Kilometer per Second)
- kph to mph (Kilometer per Hour to Mile per Hour)
- kph to knots (Kilometer per Hour to Knot)
- kph to fpm (Kilometer per Hour to Foot per Minute)
- kph to fps (Kilometer per Hour to Feet per Second)
- kph to ips (Kilometer per Hour to Inch per Second)
- kph to cms (Kilometer per Hour to Centimeter per Second)
- kph to mms (Kilometer per Hour to Millimeter per Second)
- kph to mach (Kilometer per Hour to Mach)
- kph to beaufort (Kilometer per Hour to Beaufort)
- kph to c (Kilometer per Hour to Speed of light (c))
- mph to mps (Mile per Hour to Meter per Second)
- mph to kmps (Mile per Hour to Kilometer per Second)
- mph to kph (Mile per Hour to Kilometer per Hour)
- mph to knots (Mile per Hour to Knot)
- mph to fpm (Mile per Hour to Foot per Minute)
- mph to fps (Mile per Hour to Feet per Second)
- mph to ips (Mile per Hour to Inch per Second)
- mph to cms (Mile per Hour to Centimeter per Second)
- mph to mms (Mile per Hour to Millimeter per Second)
- mph to mach (Mile per Hour to Mach)
- mph to beaufort (Mile per Hour to Beaufort)
- mph to c (Mile per Hour to Speed of light (c))
- knots to mps (Knot to Meter per Second)
- knots to kmps (Knot to Kilometer per Second)
- knots to kph (Knot to Kilometer per Hour)
- knots to mph (Knot to Mile per Hour)
- knots to fpm (Knot to Foot per Minute)
- knots to fps (Knot to Feet per Second)
- knots to ips (Knot to Inch per Second)
- knots to cms (Knot to Centimeter per Second)
- knots to mms (Knot to Millimeter per Second)
- knots to mach (Knot to Mach)
- knots to beaufort (Knot to Beaufort)
- knots to c (Knot to Speed of light (c))
- fpm to mps (Foot per Minute to Meter per Second)
- fpm to kmps (Foot per Minute to Kilometer per Second)
- fpm to kph (Foot per Minute to Kilometer per Hour)
- fpm to mph (Foot per Minute to Mile per Hour)
- fpm to knots (Foot per Minute to Knot)
- fpm to fps (Foot per Minute to Feet per Second)
- fpm to ips (Foot per Minute to Inch per Second)
- fpm to cms (Foot per Minute to Centimeter per Second)
- fpm to mms (Foot per Minute to Millimeter per Second)
- fpm to mach (Foot per Minute to Mach)
- fpm to beaufort (Foot per Minute to Beaufort)
- fpm to c (Foot per Minute to Speed of light (c))
- fps to mps (Feet per Second to Meter per Second)
- fps to kmps (Feet per Second to Kilometer per Second)
- fps to kph (Feet per Second to Kilometer per Hour)
- fps to mph (Feet per Second to Mile per Hour)
- fps to knots (Feet per Second to Knot)
- fps to fpm (Feet per Second to Foot per Minute)
- fps to ips (Feet per Second to Inch per Second)
- fps to cms (Feet per Second to Centimeter per Second)
- fps to mms (Feet per Second to Millimeter per Second)
- fps to mach (Feet per Second to Mach)
- fps to beaufort (Feet per Second to Beaufort)
- fps to c (Feet per Second to Speed of light (c))
- ips to mps (Inch per Second to Meter per Second)
- ips to kmps (Inch per Second to Kilometer per Second)
- ips to kph (Inch per Second to Kilometer per Hour)
- ips to mph (Inch per Second to Mile per Hour)
- ips to knots (Inch per Second to Knot)
- ips to fpm (Inch per Second to Foot per Minute)
- ips to fps (Inch per Second to Feet per Second)
- ips to cms (Inch per Second to Centimeter per Second)
- ips to mms (Inch per Second to Millimeter per Second)
- ips to mach (Inch per Second to Mach)
- ips to beaufort (Inch per Second to Beaufort)
- ips to c (Inch per Second to Speed of light (c))
- cms to mps (Centimeter per Second to Meter per Second)
- cms to kmps (Centimeter per Second to Kilometer per Second)
- cms to kph (Centimeter per Second to Kilometer per Hour)
- cms to mph (Centimeter per Second to Mile per Hour)
- cms to knots (Centimeter per Second to Knot)
- cms to fpm (Centimeter per Second to Foot per Minute)
- cms to fps (Centimeter per Second to Feet per Second)
- cms to ips (Centimeter per Second to Inch per Second)
- cms to mms (Centimeter per Second to Millimeter per Second)
- cms to mach (Centimeter per Second to Mach)
- cms to beaufort (Centimeter per Second to Beaufort)
- cms to c (Centimeter per Second to Speed of light (c))
- mms to mps (Millimeter per Second to Meter per Second)
- mms to kmps (Millimeter per Second to Kilometer per Second)
- mms to kph (Millimeter per Second to Kilometer per Hour)
- mms to mph (Millimeter per Second to Mile per Hour)
- mms to knots (Millimeter per Second to Knot)
- mms to fpm (Millimeter per Second to Foot per Minute)
- mms to fps (Millimeter per Second to Feet per Second)
- mms to ips (Millimeter per Second to Inch per Second)
- mms to cms (Millimeter per Second to Centimeter per Second)
- mms to mach (Millimeter per Second to Mach)
- mms to beaufort (Millimeter per Second to Beaufort)
- mms to c (Millimeter per Second to Speed of light (c))
- mach to mps (Mach to Meter per Second)
- mach to kmps (Mach to Kilometer per Second)
- mach to kph (Mach to Kilometer per Hour)
- mach to mph (Mach to Mile per Hour)
- mach to knots (Mach to Knot)
- mach to fpm (Mach to Foot per Minute)
- mach to fps (Mach to Feet per Second)
- mach to ips (Mach to Inch per Second)
- mach to cms (Mach to Centimeter per Second)
- mach to mms (Mach to Millimeter per Second)
- mach to beaufort (Mach to Beaufort)
- mach to c (Mach to Speed of light (c))
- beaufort to mps (Beaufort to Meter per Second)
- beaufort to kmps (Beaufort to Kilometer per Second)
- beaufort to kph (Beaufort to Kilometer per Hour)
- beaufort to mph (Beaufort to Mile per Hour)
- beaufort to knots (Beaufort to Knot)
- beaufort to fpm (Beaufort to Foot per Minute)
- beaufort to fps (Beaufort to Feet per Second)
- beaufort to ips (Beaufort to Inch per Second)
- beaufort to cms (Beaufort to Centimeter per Second)
- beaufort to mms (Beaufort to Millimeter per Second)
- beaufort to mach (Beaufort to Mach)
- beaufort to c (Beaufort to Speed of light (c))
- c to mps (Speed of light (c) to Meter per Second)
- c to kmps (Speed of light (c) to Kilometer per Second)
- c to kph (Speed of light (c) to Kilometer per Hour)
- c to mph (Speed of light (c) to Mile per Hour)
- c to knots (Speed of light (c) to Knot)
- c to fpm (Speed of light (c) to Foot per Minute)
- c to fps (Speed of light (c) to Feet per Second)
- c to ips (Speed of light (c) to Inch per Second)
- c to cms (Speed of light (c) to Centimeter per Second)
- c to mms (Speed of light (c) to Millimeter per Second)
- c to mach (Speed of light (c) to Mach)
- c to beaufort (Speed of light (c) to Beaufort)
Common questions (FAQ)
10 quick answers with guides and links to the matching converter.
- How do you convert km/h to mph?
- How do you convert m/s to km/h?
- How many mph are in a knot?
- What is Mach 1 in meters per second (ISA sea level)?
- What wind speed is Beaufort force 5?
- How do you convert mph to km/h?
- How do you convert km/h to m/s?
- How do you convert feet per second to m/s?
- How do you convert Mach to mph?
- What fraction of the speed of light (c) is 1 m/s?
Speed Converter Guide
Quick start
- Enter a value and pick source and target units. The result updates as you type.
- Use swap to reverse units and copy to copy the result. The All Unit Conversions panel lists your value across every supported speed unit.
Formulas & deeper content
Need formulas, worked examples, and tables for one pair (e.g. km/h to mph)? Use a dedicated converter from the list above.
Short answers to common questions are in the FAQ section above. All calculations run in your browser; m/s, km/h, mph, knots, ft/s, Mach (ISA), Beaufort, and c are supported.
Example uses
- Transportation: km/h and mph limits and cruise speeds.
- Aviation and marine: knots and Mach.
- Weather: Beaufort force vs m/s or knots.
- Science teaching: fractions of c vs m/s.