The unit of foot derived from the human foot. It is equal to 0.3048 m, and used in the imperial system of units and United States customary units. Definition of FootĪ foot (symbol: ft) is a unit of length. It is defined as "the length of the path travelled by light in vacuum during a time interval of 1/299,792,458 of a second." In 1799, France start using the metric system, and that is the first country using the metric. The meter (symbol: m) is the fundamental unit of length in the International System of Units (SI). Four Meters is equivalent to thirteen point one two three Feet. To find out how many Meters in Feet, multiply by the conversion factor or use the Length converter above. The conversion factor from Meters to Feet is 3.2808398950131. Millimeter to Foot Conversion Table Millimeter ġ5 mm = 15 × 0.0032808399 ft = 0.To calculate 4 Meters to the corresponding value in Feet, multiply the quantity in Meters by 3.2808398950131 (conversion factor). The international foot corresponds to human feet with shoe size 13 (UK), 14 (US male), 15.5 (US female), or 46 (EU). Feet are also commonly used to measure altitude (aviation) as well as elevation (such as that of a mountain). In the US, feet and inches are commonly used to measure height, shorter distances, field length (sometimes in the form of yards), etc. While the United States is one of the few, if not only, countries in which the foot is still widely used, many countries used their own version of the foot prior to metrication, as evidenced by a fairly large list of obsolete feet measurements.Ĭurrent use: The foot is primarily used in the United States, Canada, and the United Kingdom for many everyday applications. This resulted in the measurement of a foot varying between 250 mm and 335 mm in the past compared to the current definition of 304.8 mm. The various lengths were due to parts of the human body historically being used as a basis for units of length (such as the cubit, hand, span, digit, and many others, sometimes referred to as anthropic units). An answer like '7.87 feet' might not mean much to you because you may want to express the decimal part, which is in feet, in inches once its is a smaller unit. Step 2: Convert the decimal feet to inches. History/origin: Prior to standardization of units of measurement, and the definition of the foot currently in use, the measurement of the foot was used in many different systems including the Greek, Roman, English, Chinese, and French systems, varying in length between each. 1 meter 3.28 x feet, so, 2.4 x 1 meter 2.4 x 3.28 feet, or. One foot contains 12 inches, and one yard is comprised of three feet. A foot was defined as exactly 0.3048 meters in 1959. Footĭefinition: A foot (symbol: ft) is a unit of length in the imperial and US customary systems of measurement. In 2019, the meter has been re-defined based on the changes made to the definition of a second. 2.4 Meters to Feet Conversion breakdown and explanation 2. Prior to this definition, the meter was based on the length of a prototype meter bar. The relationship between the meter and the millimeter is constant however. The definition of the meter has changed over time, the current definition being based on the distance traveled by the speed of light in a given amount of time. It indicates one thousandth of the base unit, in this case the meter. History/origin: The milli- prefix is one of many metric prefixes. It is defined in terms of the meter, as 1/1000 of a meter, or the distance traveled by light in 1/299 792 458 000 of a second. Definition: A millimeter (symbol: mm) is a unit of length in the International System of Units (SI).