Convert Speed (miles per second, kilometers per hour, mps, mph)

How to use the tool

Type the number you want to convert in the value field, it will be displayed below:

Decimal places:


Conversion Tables

Meters per Second (m/s)
Kilometers per Second (km/s)
Micrometer per second (µm/s)
Millimeter per second (mm/s)
Kilometers per Hour (km/h)
Foot per second
Miles per second (mps)
Miles per hour (mph)
Other measures
Speed of light
Speed of sound
Speed of a brisk walk
Speed of a snail

Average speed

It is a vector quantity responsible for determining the displacement of a body in a certain period of time. That is, the average speed (Vm) determines the "speed" of a body in a certain distance covered.

The International System of Units (SI), uses the meter per second (m/s) to represent the unit of measurement of the speed, while the time is expressed in seconds (s). There are other units of measurement, including: km/h (kilometer per hour), mph (miles per hour), mps (miles per second), mph, among others.


The calculation of the average speed of a body is carried out by dividing the distance covered in a certain period of time, observe the following:

V m = ΔS/ΔT

Note that:

ΔS: distance covered (ΔS = S - S0)
ΔT: time interval (ΔT = T - T0)

In the conversion from meters per second (m/s) to kilometers per hour (km/h) it multiplies by 3.6. To convert kilometers per hour (km/h) to meters per second (m/s) the value is divided by 3.6, since 1 km is 1000 meters and 1 hour corresponds to 3600 s.