# Convert Speed of sound to...

Speed of sound | |
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Unit system | other |

Unit of | speed |

Symbol | speed of sound |

Unit conversions | |

1 speed of sound in ... |
... is equal to ... |

SI units | 343 m·s^{-1} |

Imperial/US unit(s) | 767.27 mph |

Other unit(s) | 666.74 knot |

**I want to convert:**
**using**

Metric | Conversion |
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Kilometre per second [km/s] | |

Metre per second [m/s] | |

Kilometre per hour [km/h] | |

Millimetre per second [mm/s] | |

Micrometre per second [µm/s] |

Imperial/US | Conversion |
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Mile per second | |

Mile per hour [mph] | |

Foot per second [ft/s] |

Nautical | Conversion |
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Knot |

Other | Conversion |
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Speed of light [c] | |

Speed of sound | |

Human walk | |

Common snail |

The **speed of sound** is the distance travelled per unit time by a sound wave as it propagates through an elastic medium.

In dry air at 20 °C (68 °F), the **speed of sound** is 343 metres per second (1125 ft/s; 1235 km/h; 767 mph; 667 kn), or a kilometre in 2.91 s or a mile in 4.69 s.

This article uses material from the Wikipedia article "Speed of sound", which is released under the Creative Commons Attribution-Share-Alike License 3.0.