Millimeter is 0.001 meter units.
Millimeters to Feet Converter — mm to ft
Convert Millimeter (mm) to Foot (ft) using the exact conversion factor (1 millimeter = 0.0032808399 foot). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Millimeters to Feet converter
Converter
Length Converter
Convert SI, imperial, US customary, astronomical, scientific, and historical length units.
Context values
Some unit families need one extra value for a physically accurate result.
A foot is exactly 0.3048 meters.
Result = input x 0.001 / 0.3048.
Length uses the meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Millimeters to Feet
Millimeter and Foot both measure length. Millimeter is typically associated with standard small/precision length unit worldwide, including in US engineering and manufacturing, while Foot is typically associated with united States (height, construction, aviation altitude).
Formula
feet = millimeters × 0.00328083989501
This factor comes from each unit's defined relationship to the category's base unit: 1 millimeter equals 0.001 base units, and 1 foot equals 0.3048 base units, so dividing one by the other gives the direct millimeter-to-foot factor of 0.00328083989501.
Simple example
1 mm × 0.003280839895 = 0.0032808399 ft
1 millimeter = 0.0032808399 feet.
Real-world example
10 mm × 0.003280839895 = 0.032808399 ft
10 millimeters = 0.032808399 feet.
Conversion table
| Millimeter (mm) | Foot (ft) |
|---|---|
| 1 mm | 0.0032808399 ft |
| 5 mm | 0.0164041995 ft |
| 10 mm | 0.032808399 ft |
| 21.0975 mm | 0.0692175197 ft |
| 42.195 mm | 0.1384350394 ft |
| 100 mm | 0.3280839895 ft |
Reverse conversion: Foot to Millimeter
0.0032808399 ft × 304.8 = 1.000000002 mm
0.0032808399 feet = 1.000000002 millimeters.
millimeters = feet × 304.8
For a page dedicated to this direction, see Foot to Millimeter.
Millimeter vs. Foot
| Aspect | Millimeter | Foot |
|---|---|---|
| Family | SI derived (metric prefix) unit | US/imperial customary unit |
| Typical use | Engineering drawings and manufacturing tolerances worldwide (including in the US) | Height measurement in the US and UK |
| Where it's used | Standard small/precision length unit worldwide, including in US engineering and manufacturing | United States (height, construction, aviation altitude) |
Understanding the Millimeter
Millimeter (mm) measures distance. A millimeter is one-thousandth of a meter. It is classified as a SI derived (metric prefix) unit.
Where it's used: Standard small/precision length unit worldwide, including in US engineering and manufacturing
Uses of the Millimeter today
- Engineering drawings and manufacturing tolerances worldwide (including in the US)
- Rainfall measurement in most countries
- Small-scale everyday measurement (screen sizes, hardware)
History of the Millimeter
The millimeter follows from the meter via the 'milli-' SI prefix (10⁻³). It is notable as one of the few metric units in routine US technical/engineering use, since precision manufacturing and electronics are often specified in millimeters even in the US.
Historical origin. Millimeter was not the invention of a single named person; it developed through the process described above.
Understanding the Foot
Foot (ft) measures distance. The international foot is defined as exactly 0.3048 meters. It is classified as a US/imperial customary unit.
Where it's used: United States (height, construction, aviation altitude) United Kingdom (height, some construction contexts)
Uses of the Foot today
- Height measurement in the US and UK
- US construction and real estate (square footage)
- Aviation altitude worldwide (feet remain standard even in metric countries)
History of the Foot
The foot has ancient roots (Roman 'pes', various regional English feet), standardized into the modern English foot over centuries. The international foot (exactly 0.3048 m) was fixed by the 1959 International Yard and Pound Agreement, resolving small historical differences between US and UK measurements.
Historical origin. Foot was not the invention of a single named person; it developed through the process described above.
Millimeter — sources
- BIPM SI Brochure — SI prefixes — Defines 'milli-' as the prefix for 10⁻³.
Foot — sources
- NIST — International yard and pound (1959) — Fixes the modern foot at exactly 0.3048 meters.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many feet are in 1 millimeter?
1 millimeter equals 0.0032808399 feet, using the exact defined conversion factor rather than an estimate.
How do I convert millimeter to foot?
Multiply the millimeter value by 0.003280839895. The converter above does this instantly to whatever precision you set.
How do I convert foot back to millimeter?
Use the reverse factor: 1 foot equals 304.8 millimeters. You can also use the swap control in the converter above to flip the direction instantly.
What is a millimeter?
Millimeter (mm) measures distance. A millimeter is one-thousandth of a meter. It is classified as a SI derived (metric prefix) unit.
What is a foot?
Foot (ft) measures distance. The international foot is defined as exactly 0.3048 meters. It is classified as a US/imperial customary unit.
Is the millimeter to foot conversion exact?
Yes. The international foot is defined as exactly 0.3048 meters. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
Where is the millimeter still used today?
Standard small/precision length unit worldwide, including in US engineering and manufacturing