**Feet**

**Inches**

**Meters**

## Algebraic Steps / Dimensional Analysis Formula

| * | 0.3048 m 1 | + | | * | 0.0254 m 1 | = | m |

## Conversion to common lengths

Inches | |
---|---|

Feet | |

Yards | |

Miles | |

Nautical Miles | |

Centimeters | |

Meters | |

Kilometers |

## Converting from Meters to Foot

Obviously the conversion can also be done the other way around. One meter equals **3.2808 feet**. To convert a certain value in meters to the equivalent value in feet, the following formula works.

**value in feet = (value in meter) * 3.2808**

For example, if we have a length of 5 meters it would be:

**5 meters * 3,2808 = 16,404 feet**

A meter is then more or less three times a foot. To make an estimate, you can multiply the value in meter by 3. So 5 meters would be a little more than 5 * 3 = 15 feet.

## Meter / Meters

Besides the foot, there is another unit of length that is better known to most people: the meter. The abbreviation of the **meter is “m”**. It will begin with a current definition of the meter, continuing with the history of the meter. Then the most common units related to the meter will be listed, these being multiples and submultiples of it.

### Definition of the meter

Like the foot, the meter is a unit of length that is used to indicate **heights and distances**, as well as edges of **areas and volumes**. In the International System of Units and in all the metric systems of the world, the meter is the basic unit of length.

Larger or smaller units of length are based on the meter being **decimal** multiples or **submultiples of it**.

**since 1983**and is as follows: The length of the meter is equal to the distance that light travels in a vacuum in

**1/299792458 seconds**.

With this exact definition, the meter can be measured in any laboratory in the world without the need for a physical standard meter.

### Multiples and Submultiples of the meter

The unit meter is the basis for many other units that are formed as multiples or submultiples of the meter. In everyday life the most common units are **the kilometer (1,000 meters), the centimeter (1/100 meter) and the millimeter (1/1000 meter)**.

But there are many more units, some that are only used in certain areas. The following list shows the most common units in science, sports, and math:

Submúltiplos del metro | Múltiplos del metro |
---|---|

decímetro (1/10 m) | decámetro (10 m) |

centímetro (1/100 m) | hectómetro (100 m) |

milímetro (1/1.000 m) | kilómetro (1.000) |

micrómetro (10^-6 m) | megámetro (10^6 m) |

nanómetro (10^-9 m) | gigámetro (10^9 m) |

picómetro (10^-12 m) | terámetro (10^12 m) |

femtómetro (10^-15 m) | petámetro (10^15 m) |

attómetro (10^-18 m) | exámetro (10^18 m) |

zeptómetro (10^-21 m) | zettametro (10^21 m) |

yoctómetro (10^-24 m) |

### The history of Meter / Meters

The definition of the meter and its exact value have not always been the same. To invent the size of the meter and establish it in society, several steps were needed, which are explained below.

**The first standard meter:**The first standard meter was created in**1795 in France**. A national convent in France wanted to introduce new universal units, with which it wanted to renew the unit of the foot, since the exact value of a foot varied from region to region. Curiously, there were also other ideas to define the meter. In the year**1668 Jean Picard**was thinking about the length of a pendulum that took exactly one second to swing from one extreme to the other. Such a pendulum would have a length of**0.994 m**on Earth.It is then quite similar to the subway we use today. However, that Picard idea was never realized. Instead measurements were made in Ecuador and Lapland to examine the distance between the equator and the north pole, passing through Paris. In

**1793**the meter that was stipulated based on the measurements was then the ten millionth of that distance. Two years later a first prototype of the standard meter was built, cast from brass.**Adaptation of the Standard Meter:**At the end of the**18th century**scientists corrected the exact distance between the equator and the pole – a new standard meter was created, this time made of platinum. The size of that meter was firmly declared in 1799.It was in the 19th century that they made more exact measurements and then corrected the distance between the equator and the north pole again. However, the standard meter of

**1799**was not changed, whose measurement of the distance between the equator and the north pole passing through Paris does not measure the supposed 10,000 km but**10,001,966 km**. During the measurements, the scientists recognized that the earth does not have a regular shape of a rolling sphere and therefore each meridian, or each line from one pole to another, can have another length.**From the Standard Meter to the wavelength:**It was in**1960**that a new definition of the meter was implemented. The standard meter had several disadvantages: As it was a physical body, it could change its length due to climate or temperature. Then there were differences between the original and the copies that were made. Plus he could get fractures from transportation. A method was needed to describe the exact length of a meter without using any physical means of comparison.Scientist Ernst Engelhard introduced the method of measuring the wavelength of radiation emitted by atoms in the Crypton nucleus during the transition from one energy state to another. You had to multiply that wavelength by

**1650763.73**to get the exact length of one meter according to the standard meter. With this method it was possible to measure the exact meter anywhere in the world without any object of comparison.**The speed of light:**Every time the exact length of a meter was corrected, they also had to correct the speed of light, which was based on the meter. That caused problems, because the speed of light is a constant based on nature and should never change in value. Therefore the decision was made to define the meter based on the speed of light and not the other way around. Since**1983**it has been determined that the meter has the length of the distance that light travels in**1/299792458**seconds . Since then the length of the meter is based on a natural constant that according to our knowledge today will never change.

## Surface units

Both the meter and the foot are units of length. Therefore they can be used to measure **one-dimensional lengths**, but they are **also** used to measure **two-dimensional surfaces**. In those cases, the surface measurements are derived from the edges of the length units.

### Square meter

The **square meter (m²)** is the **basic unit of surface**, defined by the **International System of Units (SI)**.

One square meter equals a square-shaped area that is one meter long and one meter wide.

This unit is used in many situations, for example to indicate the size of a room, a house or a garden.

Units multiples of the square meter are the square decameter or area (**100 m²**), the square hectometer or the hectare (**10,000 m²**) and the square kilometer (**1,000,000 m²**) that is equivalent to a square area of one kilometer long and a kilometer wide.

### Square foot

You can also measure surfaces using the **foot as the unit of length**. The surface then has the unit square foot, or in English “**square foot**” in the singular and “**square feet**” in the plural. There is no specific abbreviation, but there is for example the abbreviation “**sq ft**“. The value of one square foot equals 0.09 square meters.

The square foot is used as a unit of area in the **United States** and the **United Kingdom**. Formerly it was also used in continental Europe, but with the introduction of the International System of Units, the square foot was no longer used. Other units of surface according to the Anglo-Saxon System of units are the square yard and the square mile.

## Volume Units

Another derivation of a unit of length is the unit of volume. In this case, the unit of length is used to indicate, for example, the length, width and depth of a cube.

#### Cubic meter

The cubic meter is the official unit of volume in metric systems, approved by the International System of Units. One cubic meter equals the volume of a cube that is one meter long, one meter wide and one meter deep. The best known submultiple of the cubic meter is the **cubic decimeter or liter (1 / 1,000 m3)**.

The unit of the liter and its submultiples are found in **cooking and liquid product** indications . A liter of water weighs exactly one kilo. The cubic meter is also used to indicate volumes of trucks, pools, tanks and other containers.

#### Cubic foot

In Anglo-Saxon countries, the cubic foot, which is equivalent to **28,317 liters, is used** to measure volumes.

A cubic foot is equivalent to a cube that is one foot long, one foot wide, and one foot deep.

Instead of the liter, the Anglo-Saxon countries have volume units such as **the quart, the pint and the gallon**.

There are also the cubic inch, cubic yard, and cubic mile to indicate larger volumes.