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foot (ft) → millimeter (mm)

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0
ft=mm
0.01=3.048
0.1=30.48
1=304.8
2=609.6
3=914.4
5=1,524
10=3,048
20=6,096
50=15,240
100=30,480
1000=304,800

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Brief explanation: foot to millimeter

Length conversion multiplies by a factor. Meter is the base unit in the metric system. Kilometer = 1000 m, mile ≈ 1609 m. Foot = 0.3048 m, inch = 2.54 cm. The metric system (km, m, cm, mm) is used worldwide. The imperial system (mi, ft, in, yd) is common in the United States and United Kingdom. When converting, multiply the value by the appropriate factor—for example, to convert km to miles, multiply by 0.621371.

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Common conversion examples: foot to millimeter

Reference values for quick comparison. Use the converter above for any amount.

  • 1 foot=304.80 millimeter
  • 5 foot=1,524 millimeter
  • 100 foot=30,480 millimeter

About the Units

foot (ft)

Definition: A foot (ft) is a unit of length in the imperial and US customary systems. One foot equals 12 inches or exactly 0.3048 meters. It is one of the most common imperial units for measuring height and room dimensions.
History: The foot has ancient origins, likely based on the length of a human foot. Standardization varied by region until the international yard and pound agreement of 1959 defined the foot as exactly 0.3048 meters.
Current use: Feet are used for human height, room dimensions, and altitude in the US and UK. Real estate listings, aircraft altitude, and construction often use feet. The metric system uses meters for equivalent measurements.

millimeter (mm)

Definition: A millimeter (mm) is a unit of length equal to one thousandth of a meter. There are 1,000 millimeters in one meter. The prefix milli- means one thousandth. It is used for precise measurements and small dimensions.
History: The millimeter became standard with the metric system. It allowed engineers and craftspeople to specify dimensions with precision without decimals. Manufacturing and machining rely heavily on millimeter tolerances.
Current use: Millimeters are used in engineering, manufacturing, and medicine. Sheet metal thickness, screw sizes, and medical measurements (e.g., tumor size) are often in millimeters. Rain gauges and rulers commonly use millimeter divisions.

Sources

Conversion factors and unit definitions follow international standards. For authoritative references, see: