Feet To Millimeters Conversion


1 ft = 304.8 mm

Want to convert from millimeters to feet instead?

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The Ratio Between Feet and Millimeters

Visualising the relationship between feet and millimeters makes it easier to convert between the two. Feet are used to establish the baseline ruler and the millimeters ruler is sized in relation to that baseline.

conversion scale showing the ratio between feet and the equivalent number of millimeters

How to convert feet to millimeters (ft to mm)

The formula for converting feet to millimeters is: mm = ft × 304.8. To calculate the foot value in millimeters first substitute the foot value into the preceding formula, and then perform the calculation. If we wanted to calculate 1 foot in millimeters we follow these steps:

mm = ft × 304.8

mm = 1 × 304.8

mm = 304.8

In other words, 1 foot is equal to 304.8 millimeters.

Example Conversion

Let's take a look at an example. The step-by-step process to convert 7 feet to millimeters is:

  1. Understand the conversion formula: mm = ft × 304.8
  2. Substitute the required value. In this case we substitute 7 for ft so the formula becomes: mm = 7 × 304.8
  3. Calculate the result using the provided values. In our example the result is: 7 × 304.8 = 2133.6 mm

In summary, 7 feet is equal to 2133.6 millimeters.

Converting millimeters to feet

In order to convert the other way around i.e. millimeters to feet, you would use the following formula: ft = mm ÷ 304.8. To convert millimeters to feet first substitute the millimeter value into the above formula, and then execute the calculation. If we wanted to calculate 1 millimeter in feet we follow these steps:

ft = mm ÷ 304.8

ft = 1 ÷ 304.8

ft = 0.00328083989501312335958005249344

Or in other words, 1 millimeter is equal to 0.00328083989501312335958005249344 feet.

Conversion Unit Definitions

What is a Foot?

The foot (pl. feet), standard symbol: ft, is a unit of length in the British imperial and United States customary systems of measurement. The prime symbol, ′, is a customarily used alternative symbol. Since the International Yard and Pound Agreement of 1959, one foot is defined as 0.3048 meters exactly. In both customary and imperial units, one foot comprises 12 inches and one yard comprises three feet.
Historically the "foot" was a part of many local systems of units, including the Greek, Roman, Chinese, French, and English systems. It varied in length from country to country, from city to city, and sometimes from trade to trade. Its length was usually between 250 mm and 335 mm and was generally, but not always, subdivided into 12 inches or 16 digits.
The United States is the only industrialized nation that uses the international foot in preference to the meter in its commercial, engineering, and standards activities. The foot is legally recognized in the United Kingdom; road signs must use imperial units (however, distances on road signs are always marked in miles or yards, not feet), while its usage is widespread among the British public as a measurement of height.
Here are some more details about the foot:
  1. Historical Context: The foot has been used as a unit of measurement for thousands of years and has roots in various ancient civilizations. It was originally based on the length of a human foot, but over time, standardized units were developed to ensure consistency.

  2. Imperial and US Customary Systems: The foot is a fundamental unit in both the Imperial system and the United States Customary system. These systems of measurement are closely related and share many common units. The foot is divided into 12 inches and is further subdivided into smaller units such as the inch, half-inch, quarter-inch, etc.

  3. Length Conversion: As mentioned earlier, one foot is equal to 12 inches or approximately 30.48 centimeters. Conversely, one inch is equal to 1/12th of a foot.

  4. Symbol: The symbol for foot is a single prime ('). For example, a measurement of 5 feet would be written as 5'.

  5. Usage: The foot is commonly used in various applications, including construction, architecture, interior design, surveying, and sports. It is often used to measure heights, distances, room dimensions, and other similar quantities.

  6. Subdivisions: The foot can be divided into smaller units to measure finer lengths. Apart from the inch, mentioned earlier, there are also other subdivisions used in specific contexts. For example, in surveying, a foot can be divided into tenths or hundredths for precise measurements.

  7. International Usage: While the metric system (based on the meter) is the predominant system of measurement used worldwide, the foot is still used in certain countries, such as the United States and the United Kingdom, especially in everyday contexts. However, it's worth noting that in scientific, technical, and international contexts, the meter is typically used for consistency and compatibility.

What is a Millimeter?

The millimeter is a unit of length in the metric system. It is defined as one-thousandth of a meter or 0.001 meters. The millimeter is primarily used to measure very small distances or dimensions.
Here are some additional details about the millimeter:
  1. Metric System: The millimeter is part of the metric system, which is widely used around the world. The metric system provides a decimal-based system of measurement that offers simplicity, consistency, and ease of conversion across different scientific, industrial, and everyday applications.

  2. Length Conversion: One millimeter is equal to 0.001 meters or 0.1 centimeters. Conversely, one meter is equal to 1,000 millimeters.

  3. Common Uses: The millimeter is often used in various fields and applications where precision is required. It is commonly used in fields such as engineering, manufacturing, construction, medicine, and technology. The millimeter is well-suited for measuring small objects, thicknesses, clearances, and other precise dimensions.

  4. Symbol: The symbol for millimeter is "mm". For example, a measurement of 5 millimeters would be written as 5 mm.

  5. Subdivisions: The millimeter itself is a small unit of measurement, but it can be further divided into even smaller units for more precise measurements. For example, one millimeter is equal to 1,000 micrometers (µm) or one million nanometers (nm).

  6. International Usage: The millimeter is widely accepted and used internationally as a standard unit of measurement. It is embraced in most countries that have adopted the metric system. Its universal usage promotes consistency and facilitates communication, collaboration, and compatibility across various fields and regions.

  7. Advantages: The millimeter offers a high level of accuracy and precision for measuring small lengths or dimensions. Its decimal nature allows for easy conversion to other metric units and simplifies calculations involving measurements.

Feet To Millimeters Conversion Table

Below is a lookup table showing common feet to millimeters conversion values.

Foot (ft)Millimeter (mm)
1 ft304.8 mm
2 ft609.6 mm
3 ft914.4 mm
4 ft1219.2 mm
5 ft1524 mm
6 ft1828.8 mm
7 ft2133.6 mm
8 ft2438.4 mm
9 ft2743.2 mm
10 ft3048 mm
11 ft3352.8 mm
12 ft3657.6 mm
13 ft3962.4 mm

Other Common Foot Conversions

Below is a table of common conversions from feet to other length units.

1 foot in inches12 in
1 foot in yards0.333333333333333333333333333333 yd
1 foot in meters0.3048 m
1 foot in kilometers0.00030478512648582749161840902164 km

Feet To Millimeters Conversion Chart