Speed Converter

Speed Converter Tool

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Speed Convert is the Best Online Speed Converter Tool, free without app. Speed Convert Tool helps to management, analysis, editing, generate and convert data.

Best Speed Converter Tool

Converts between from one unit of speed measurement, including meter/second [m/s], kilometer/hour [km/h], mile/hour [mi/h], break, etc. to another in one click.

Speed is a scalar quantity that refers to "how fast an object is moving." Speed can be thought of as the rate at which an object covers distance. A fast-moving object has a high speed and covers a relatively large distance in a short amount of time.

This speed conversion calculator enables you to convert between 18 different units of speed measurement in real-time. Choose between popular units, such as kilometers per hour, meters per second, feet per second, miles per hour and knots, or pick some more obscure ones, such as those used in astronomy like kilometers per second or the speed of light. Enter your known value, and you will instantly see the results in 4 other units.

While this simple tool converts from one unit to another, the speed calculator works out speed based on time and distance. If you are a sports enthusiast, you may find our running pace calculator useful.

What is speed?

The speed of an object is the distance it covers in a certain amount of time, without any regard to the direction of travel. The related term, velocity, uses vectors or positive and negative values to indicate direction.

For example, if in an hour you drive 🚗 40 miles, then your speed (at least your average speed) is 40 miles per hour (mph).

Units of speed

You may not be familiar with all of the units present in this speed conversion calculator. Feet per second and miles per hour are units commonly used in countries that use the imperial system, such as the United States, the United Kingdom, and Australia. On the other hand, meters per second and kilometers per hour are the units of choice for those nations that use the metric system, i.e., the rest of the world.

If you are looking to take to the high seas, then knots are your unit of choice (they are used regardless of your affiliation to the imperial or metric systems). One knot equals one nautical mile per hour (approximately 1.151 mph).

How to convert between units of speed?

To convert from one speed unit to another, it is simply a case of multiplying the speed by the correct conversion factor. In equation form, we can write:

converted speed = original speed * conversion factor

So, for example, to convert from mph to kmh (miles per hour to kilometers per hour), we use a conversion factor of 1.609344. Let's try it out and convert 200 mph to kmh:

speed in kmh = 200 mph * 1.609344 ≈ 322 kmh

Another example is to convert meters per second to miles per hour, which has a conversion factor of 2.23693629. To illustrate this example, let's take Usain Bolt's record 100 meter run of 8.70 seconds. Dividing 100 meters by 8.70 seconds gives a speed of 11.5 m/s. The conversion to mph is then given by:

speed in mph = 11.5 m/s * 2.23693629 ≈ 25.7 mph

How to use this speed converter?

By default, the speed conversion calculator displays eleven of the most popular units of speed people use in their everyday lives. However, we also have seven other units of speed to explore. Here's how:

Enter your speed into one of the rows showing a commonly used unit, either in the imperial, metric, or other section of the speed converter.
In any one of the other rows, click on the unit and a drop-down menu will appear.
The converter then allows you to choose from the full list of units used in that category of speed units.
The speed converter will then display your speed in the unit you chose.
As a bonus, the speed converter also shows the pace of the speed in various units. Pace flips the speed formula around and states the speed in the amount of time per unit distance. We often use it to measure and compare running speeds in athletics.
We also recommend checking our dimensional analysis calculator.