All Speed Units

How to Convert Speed Units?

Speed conversion allows you to translate velocity measurements between different unit systems. Speed measures how fast an object moves over a given distance in a specific time period. The most common units include kilometers per hour (km/h) used in most countries, miles per hour (mph) used in the US and UK, and meters per second (m/s) used in scientific contexts.

The key conversion factors are:
- 1 km/h = 0.621371 mph
- 1 mph = 1.60934 km/h
- 1 m/s = 3.6 km/h = 2.237 mph
- 1 knot = 1.852 km/h = 1.151 mph

Units

Kilometer per hour (km/h)

Kilometer per hour is the most widely used unit of speed in the world. It represents the distance in kilometers traveled in one hour. This unit is the standard for road speed limits, vehicle speedometers, and weather reports in most countries outside the United States. It is part of the metric system and provides an intuitive measure for everyday travel speeds.

Mile per hour (mph)

Mile per hour is the standard unit of speed in the United States, United Kingdom, and some other countries that use the imperial system. It indicates how many miles are covered in one hour. This unit is commonly used for road signs, vehicle speedometers, and wind speed measurements in these regions. One mile equals approximately 1.609 kilometers.

Meter per second (m/s)

Meter per second is the SI (International System of Units) base unit for speed. It is the preferred unit in scientific and engineering contexts due to its direct relationship with other SI units. This unit is commonly used in physics calculations, athletics (such as running speeds), and scientific research where precision and standardization are essential.

Knot (kn)

A knot is a unit of speed equal to one nautical mile per hour. It is primarily used in maritime and aviation contexts worldwide. One knot equals approximately 1.852 km/h or 1.151 mph. The term originated from the practice of measuring a ship's speed by counting knots on a rope paid out over a fixed time period.

Foot per second (ft/s)

Foot per second is an imperial unit of speed used primarily in the United States for specific applications. It is commonly used in ballistics, aerospace engineering, and some industrial applications. One foot per second equals approximately 0.305 m/s or 1.097 km/h.

Common Speed Conversions