Units of Speed

Click para leer versión en español

Edited image of the UF GTR, from Live For Speed. (km/h)

Measuring Speed

Check here the Mph, the Km/h, and some variants as “m/s” which are used in some racing games.

Ford Mondeo MK3 ST220 - Speedometer

Speedometer, with mph (black) and km/h (red) units

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Speedometer

Tachometer (left) and Speedometer in Mph (right)


The MPH is coming from the imperial system, and is used in the United States and the United Kingdom. MPH is often used in sporting events such as baseball or tennis, to express the speed of delivery of a ball.

The MPH is used to express the number of statute miles covered in one hour, should not be confused with the nautical mile and such variants.

1 MPH is equal to 1.60934 km/h.
This means, if you are in a car at 100 MPH, actually you are driving at 160 km/h.

If you want to know how much MPH are in “x” km/h, you should divide the amount of km/h between 1.609344, or multiply it by 0.62137, is the same.

Example: “400 km/h”
400/1.60934 ≈ 248.54 -> 248.54 MPH
400X 0.62137 ≈248.54 -> 248.54 MPH

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Speedometer (kmh)

speedometer using km/h only.

The km/h is coming from the metric system, and is used worldwide, except some countries
as the United States and the United Kingdom.
1km/h = 0.62137 MPH.

If you are going at the speed of 300km/h, this means that you are driving around 186.mph, this is the
equivalent speed.

If you want to know how much km/h are in “x” mph, you should multiply the amount of mph by
1.609344, or divide it by 0.62137
, is the same.

For example: “300 MPH”
300×1.609 ≈ 482.8 -> 482.8 km/h.
see also:
300/0.62137≈ 482.8 ->482.8 km/h

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Sometimes, you could find the speed expressed in “m/s“.

is an SI derived unit of both speed (scalar) and velocity (vector quantity which specifies both magnitude and a specific direction), defined by distance in metres divided by time in seconds.

If you want to know how much km/h is just 1 m/s, or how much m/s is 1 km/h, check this:

1 m/s = 3.6 km/h
1 km/h ≈ 0.277 m/s

so, with this you can figure it out how to convert between units.

Example: Convert 50 km/h to “m/s”:
1 km/h ≈ 0.277 m/s, then:
50 x 0.277 ≈ 13.88 m/s
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Example #2: Convert 100 m/s to km/h:
1 m/s = 3.6 km/h, then:
100 x 3.6 =360 km/h

Speed in km/h

All what you need is to know the conversion factor. Basically, you have to multiply or divide, depending of the case and you will get your desired unit.

Click here to read the full post about units of measurement.

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Posted on July 4, 2012, in General and tagged , , , , , , , , , . Bookmark the permalink. 1 Comment.

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