# Speed Conversions

speed conversions## What is speed?

Speed is the distance traveled by an object during a unit of time (speed = distance / time). The standard derived unit of speed in the International System of Units (SI) is meter per second (m s-1 or m/s). Other units of speed commonly used around the world are kilometer per hour (km h-1 or km/h), mile per hour (mph or mi/h), mile per second (mps or mi/s), foot per hour (ft/h), foot per second (ft/s or fps), inch per second (in/s) and knot (kn).

## Common speed conversions

- 1 meter per second (m/s) = 3.6 kilometers per hour (km/h) = 2.236936 miles per hour (mph)
- 1 mile per hour (mph) = 0.44704 meters per second (m/s) = 1.609344 kilometers per hour (km/h)
- 1 kilometer per hour (km/h) = 0.2777 meters per second (m/s) = 0.62137 miles per hour (mph)
- 1 foot per second (ft/s) = 0.3048 meters per second (m/s) = 1.09728 kilometers per hour (km/h)
- 1 inch per second (in/s) = 0.0254 meters per second (m/s) = 0.083 feet per second (ft/s)
- 1 knot (kn) = 1.852 kilometers per hour (km/h) = 1.150779 miles per hour (mph)

## Need for speed conversions: access links

Below there is a list with conversions from and to various (metric, imperial, or customary) speed measurement units.

- convert from centimeters per second (cm/s)
- convert from feet per hour (ft/h)
- convert from feet per minute (ft/min)
- convert from feet per second (ft/s)
- convert from inches per hour (in/h)
- convert from inches per minute (in/min)
- convert from inches per second (in/s)
- convert from kilometers per hour (km/h)
- convert from kilometers per minute (km/min)
- convert from kilometers per second (km/s)
- convert from knots (kn)
- convert from meters per hour (m/h)
- convert from meters per minute (m/min)
- convert from meters per second (m/s)
- convert from micrometers per second (μm/s)
- convert from miles per hour (mph)
- convert from miles per minute (mpm)
- convert from miles per second (mps)
- convert from millimeters per second (mm/s)
- convert from nautical miles per day (nmi/d)
- convert from nautical miles per hour (nmi/h)
- convert from speed of light (c)
- convert from speed of sound
- convert from walking speed