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Combinations without Repetition Multiplication Introduction Percent of Increase Formula Derive Area of a Circle Formula Inequalities Tangent Line to a Circle, Normal Line Adding/Subtracting FractionsHow to Measure Speed

A straightforward definition of speed is:

The measure of the rate of movement of an object, particularly in relation to time.

It is the case that there are a few different types of units for measuring speed.

When looking at how to measure speed, the most common units of speed that are usually encountered in the US are the imperial units "Feet per Second" and "Miles per Hour".

FEET PER SECOND (

MILES PER HOUR (

Many modern crossbows can fire arrows at over **300fps**, meaning that the arrows fired travel
over **300** feet in **1** second.

Most road vehicles today are capable of driving at speeds above **100mph**, they can travel a
distance of over **100** miles in **1** hour.

Many jumbo jets can even fly at over **500mph**.

**1 fps** = **0.6818 mph** to 4 decimal
places.

**1 mph** = **1.46667 fps** to 5 decimal
places.

To convert fps to mph, multiply by **1.46667**.

To convert mph to fps, multiply by **0.6818**.

If required, more information on seconds and hours can be seen on the
__ time
math__ page.

While more information on feet and miles can be seen on the

There are also Metric units of speed that are commonly used in many parts of the world, the main ones are "Meters per Second" and "Kilometers per Hour".

METERS PER SECOND (

KILOOMETERS PER HOUR (

Like with "Feet per Second" and "Miles per Hour".

"Meters per Second" is how many meters can be traveled in a second, and "Kilometers per Hour" is
how many kilometers can be traveled in an hour.

In Europe the speedometers on cars are displayed in **km/h**.

**1 m/s** = **3.6 kph**.

**1 kph** =
\bf{\frac{1}{3.6}} **m/s**
= **0.27778 m/s** to 5 decimal places.

To convert  m/s to  km/h, multiply by **3.6**.

To convert  km/h to  m/s, divide by **3.6**.

Metric & Imperial Conversions

Knowing how to quickly and accurately switch between metric and imperial measurements of speed is
important.

Before looking at some examples, below is a list of some standard conversions between
metric and imperial.

Convert

Convert

A handy speed conversion calculator and some conversion tables can be seen at __ calculateme.com__.

There are some interesting speeds that can be handy to know, a selection of which are listed below as very close approximations.

which is