# Convert mm to feet

Please provide values below to convert millimeter [mm] to foot [ft], or *vice versa*.

### Millimeter

**Definition:** A millimeter (symbol: mm) is a unit of length in the International System of Units (SI). 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.

**History/origin:** The milli- prefix is one of many metric prefixes. It indicates one thousandth of the base unit, in this case the meter. 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. The relationship between the meter and the millimeter is constant however. Prior to the current definition, the meter was based on the length of a prototype meter bar. As with all SI units, the definition of the meter is subject to change, and it is possible that a new definition of the meter will be in place in the future.

### Foot

**Definition:** A foot (symbol: ft) is a unit of length in the imperial and US customary systems of measurement. A foot was defined as exactly 0.3048 meters in 1959. One foot contains 12 inches, and one yard is comprised of three feet.

**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. 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). 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. 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.

**Current use:** The foot is primarily used in the United States, Canada, and the United Kingdom for many everyday applications. In the US, feet and inches are commonly used to measure height, shorter distances, field length (sometimes in the form of yards), etc. Feet are also commonly used to measure altitude (aviation) as well as elevation (such as that of a mountain). The international foot corresponds to human feet with shoe size 13 (UK), 14 (US male), 15.5 (US female), or 46 (EU).

### Millimeter to Foot Conversion Table

Millimeter [mm] | Foot [ft] |
---|---|

0.01 mm | 3.28084E-5 ft |

0.1 mm | 0.000328084 ft |

1 mm | 0.0032808399 ft |

2 mm | 0.0065616798 ft |

3 mm | 0.0098425197 ft |

5 mm | 0.0164041995 ft |

10 mm | 0.032808399 ft |

20 mm | 0.0656167979 ft |

50 mm | 0.1640419948 ft |

100 mm | 0.3280839895 ft |

1000 mm | 3.280839895 ft |

### How to Convert Millimeter to Foot

1 mm = 0.0032808399 ft

1 ft = 304.8 mm

**Example:** convert 15 mm to ft:

15 mm = 15 × 0.0032808399 ft = 0.0492125984 ft