# Unit Converter: Speed (m/s, km/h, fps, mph)

• Convert speed units such as Metric system and United States customary units / Imperial units to each other.
• Round to the 14th decimal place.

### Metric system

 metre per second m/s metre per minute m/min metre per hour m/h kilometre per second km/s kilometre per minute km/min kilometre per hour km/h

### United States customary units / Imperial units

 foot per second fps foot per minute fpm foot per hour fph miles per second mps miles per minute mpm miles per hour mph

### Others

 knot kn
 mach number M
 speed of light c
* About the notation of "e": Numbers with many digits may be displayed as "1e9". This is a computer exponential notation, where “e” represents a power of 10.
1e3 = 103 = 1,000
1e6 = 106 = 1,000,000
1e9 = 109 = 1,000,000,000
1e-3 = 10-3 = 0.001
1e-6 = 10-6 = 0.000001
1e-9 = 10-9 = 0.000000001

## Speed conversion formula

### Metric system

$1m/s = 60m/min = 60 \times 60m/h$ $1m/h = {\dfrac {1}{60}}m/min = {\dfrac {1}{60 \times 60}}m/s$ $1m/s = {\dfrac {1}{1000}}km/s = {\dfrac {60}{1000}}km/min = {\dfrac {60 \times 60}{1000}}km/h$ $1km/h = 1000m/h = {\dfrac {1000}{60}}m/min = {\dfrac {1000}{60 \times 60}}m/s$

### United States customary units / Imperial units

$1fps = 60fpm = 60 \times 60fph$ $1mps = 60mpm = 60 \times 60mph$

$1mps = 5280fps \\ (1mi = 5280ft)$

$1fps = 0.3048 m/s \\ (1ft = 0.3048m)$

### その他

#### Knot

$1kn = 1nm/h = 1852m/h$

#### Mach number

$1M = 340m/s$

#### Speed of light

$c = 299792458 m/s$