# Convert m/s to km/s, km/s to m/s - Speed Conversion

Use these **online** calculators to convert between meters per second (m/s) and kilometers per second (km/s).

## Conversion Calculators

Enter your value in one of the conversion calculators below to **convert m/s to km/s** or **convert km/s to m/s**.

## Convert m/s to km/s

## Convert km/s to m/s

**How to convert m/s to km/s**: Use the conversion calculator on the left titled "Convert m/s to km/s". Enter a value in the m/s field and click on the "Calculate km/s" button. Your answer will appear in the km/s field.

**How to convert km/s to m/s** Use the conversion calculator on the right titled "Convert km/s to m/s". Enter a value in the km/s field and click on the "Calculate m/s" button. Your answer will appear in the m/s field.

## Conversion Definitions

Below are definitions relating to these conversion formulas.

### What are meters per second (m/s)?

Meters per second is a unit of speed in the Metric System. It measures the number of meters travelled in a second. The symbol for meters per second is m/s and the International spelling is metres per second.

### What are kilometers per second (km/s)?

Kilometers per second is a unit of speed in the Metric System. It measures the number of kilometers travelled in a second. The symbol for kilometers per second is km/s and the International spelling is kilometres per second.

### Understanding the Speed Units

This table provides a summary of the Speed units within their respective measurement systems.

Unit | Symbol | Measurement System | Description |
---|---|---|---|

inches per second | in/s | US Customary Units (and Imperial) | |

feet per second | ft/s | US Customary Units (and Imperial) | 1 ft/s = 12 in/s |

yards per second | yd/s | US Customary Units (and Imperial) | 1 yd/s = 3 ft/s |

miles per second | mi/s | US Customary Units (and Imperial) | 1 mi/s = 1760 yd/s 1 mi/s = 5280 ft/s |

millimeters per second | mm/s | Metric System | 1000 mm/s = 1 m/s |

centimeters per second | cm/s | Metric System | 100 cm/s = 1 m/s 1 cm/s = 10 mm/s |

decimeters per second | dm/s | Metric System | 10 dm/s = 1 m/s 1 dm/s = 10 cm/s |

meters per second | m/s | Metric System | 1 m/s = 1000 mm/s 1 m/s = 100 cm/s 1 m/s = 10 dm/s |

kilometers per second | km/s | Metric System | 1 km/s = 1000 m/s |