# Speed Unit Converters

## All-in-One Speed Converter

This all-in-one speed converter lets you calculate all speed units at once. Convert between speed units including foot per hour, foot per minute, foot per second, kilometer per hour, kilometer per minute, kilometer per second, knot (std), knot (UK), mach, meter per hour, meter per minute, meter per second, mile per hour, mile per minute, mile per second, speed of light, speed of sound, yard per hour, yard per minute, and yard per second.

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## All Speed Converters

The speed converters below provide more detail about converting between the individual speed units. Each one includes a definition of the individual speed units, step-by-step instructions on performing the conversion, conversion examples, together with conversion charts and other visualisations.

## What Speed Units Are Supported?

Name | Symbol | Measurement System | Description |
---|---|---|---|

foot per second | ft/s | United States customary / Imperial system | Foot per second (ft/s) is a unit of linear velocity measurement. It represents the rate at which an object or particle travels a distance of one foot in one second. Foot per second is commonly used to quantify the speed or velocity of objects or the flow rate of fluids. |

foot per minute | ft/m | United States customary / Imperial system | Feet per minute (ft/min) is a unit of linear velocity measurement. It represents the rate at which an object or particle travels a distance of one foot in one minute. Feet per minute is used to quantify slower speeds or rates of movement over longer time intervals. |

foot per hour | ft/h | United States customary / Imperial system | Feet per hour (ft/hr) is a unit of linear velocity measurement. It represents the rate at which an object or particle travels a distance of one foot in one hour. Feet per hour is used to quantify extremely slow speeds or rates of movement over extended time intervals. |

kilometer per second | km/s | International System of Units (SI) / Metric System | Kilometers per second (km/s) is a unit of linear velocity measurement. It represents the rate at which an object or particle travels a distance of one kilometer in one second. Kilometers per second is commonly used to quantify high speeds or rapid rates of movement. |

kilometer per minute | km/m | International System of Units (SI) / Metric System | Kilometers per minute (km/min) is a unit of linear velocity measurement. It represents the rate at which an object or particle travels a distance of one kilometer in one minute. Kilometers per minute is used to quantify speeds or rates of movement over relatively short time intervals. |

kilometer per hour | km/h | International System of Units (SI) / Metric System | Kilometers per hour (km/h) is a unit of linear velocity measurement. It represents the rate at which an object or particle travels a distance of one kilometer in one hour. Kilometers per hour is commonly used to quantify speeds or rates of movement over longer time intervals. |

knot (std) | kn, kt | Non-SI (International) | A knot is a unit of speed typically used in maritime and aviation contexts. It represents one nautical mile per hour, where a nautical mile is defined as one minute of latitude on a navigational chart. Knots are commonly used to measure the speed of ships, boats, and aircraft. |

knot (UK) | kn, kt | Non-SI (International) | Prior to 1970, the knot unit of speed was defined in the UK in terms of the imperial measurement system. The knot was defined as the speed of one nautical mile per hour (nm/h), where a nautical mile was defined as 6,080 feet, which is equivalent to 1,853.184 meters or approximately 1.151 miles. |

mach | Ma | Non-SI (International) | Mach is a unit of speed used to measure the velocity of an object relative to the speed of sound in the surrounding medium. It is named after Ernst Mach, an Austrian physicist. Mach 1 represents the speed of sound, so when an object is traveling at Mach 2, it is moving twice as fast as the speed of sound. |

meter per second | m/s | International System of Units (SI) / Metric System | Meters per second is a unit of speed that represents the distance traveled in meters divided by the time taken in seconds. It is a fundamental unit of speed in the International System of Units (SI). |

meter per minute | m/min | International System of Units (SI) / Metric System | Meters per minute is a unit of speed that represents the distance traveled in meters divided by the time taken in minutes. It is derived from the fundamental unit of length, the meter, and the unit of time, the minute. |

meter per hour | m/h | International System of Units (SI) / Metric System | Meter per hour is a unit of speed that represents the distance traveled in meters divided by the time taken in hours. It is derived from the fundamental unit of length, the meter, and the unit of time, the hour. |

mile per second | mi/s | United States customary / Imperial system | Mile per second is a unit of speed that represents the distance traveled in miles divided by the time taken in seconds. It is a relatively high-speed measurement used to describe rapid velocities. |

mile per minute | mi/m | United States customary / Imperial system | Mile per minute is a unit of speed that represents the distance traveled in miles divided by the time taken in minutes. It is derived from the unit of length, the mile, and the unit of time, the minute. |

mile per hour | mph | United States customary / Imperial system | Mile per hour (abbreviated as mph) is a unit of speed commonly used in countries that follow the imperial system of measurement, such as the United States and the United Kingdom. It measures the distance traveled in miles divided by the time taken in hours. |

yard per second | yd/s | United States customary / Imperial system | Yard per second is a unit of speed that measures the distance traveled in yards divided by the time taken in seconds. It is primarily used in countries that follow the imperial system of measurement, such as the United States and the United Kingdom. |

yard per minute | yd/m | United States customary / Imperial system | Yard per minute is a unit of speed that measures the distance traveled in yards divided by the time taken in minutes. It is primarily used in countries that follow the imperial system of measurement, such as the United States and the United Kingdom. |

yard per hour | yd/h | United States customary / Imperial system | Yard per hour is a unit of speed that measures the distance traveled in yards divided by the time taken in hours. It is primarily used in countries that follow the imperial system of measurement, such as the United States and the United Kingdom. |

speed of light | c | SI Defining Constant | The speed of light is a fundamental constant in physics that represents the maximum speed at which information or energy can travel through space. In a vacuum, the speed of light is approximately 299,792,458 meters per second (or about 186,282 miles per second). |

speed of sound | c | other | The speed of sound is the rate at which sound waves propagate through a medium, such as air, water, or solids. It represents the speed at which disturbances or vibrations in the medium travel and carry sound energy. The speed of sound can vary depending on the properties of the medium. |