Foot to Millimeter Converter
One Foot equals 304.8 Millimeter (1 ft = 304.8 mm). Multiply a Foot value by 304.8 to get the equivalent in Millimeter. Use the calculator above for instant results, or follow the formula, worked examples, and reference table below.
Formula
mm = ft × 304.8
Multiply the Foot value by 304.8 to get the equivalent value in Millimeter.
Example Conversions
1 Foot (ft)
304.8 Millimeter (mm)
5 Foot (ft)
1524 Millimeter (mm)
10 Foot (ft)
3048 Millimeter (mm)
25 Foot (ft)
7620 Millimeter (mm)
100 Foot (ft)
30480 Millimeter (mm)
Conversion Table
| Foot (ft) | Millimeter (mm) |
|---|---|
| 0.1 | 30.48 |
| 0.5 | 152.4 |
| 1 | 304.8 |
| 2 | 609.6 |
| 5 | 1524 |
| 10 | 3048 |
| 25 | 7620 |
| 50 | 15240 |
| 100 | 30480 |
| 250 | 76200 |
| 500 | 152400 |
| 1000 | 304800 |
How to Convert Manually
Use these steps to convert Foot values to Millimeter without the calculator.
- Write down the value in Foot (ft) that you want to convert.
- Multiply that value by 304.8.
- For example, 10 Foot × 304.8 = 3048 Millimeter.
- Label the result as Millimeter (mm).
Relative Size Comparison
This chart shows the visual difference in size between exactly one Foot and one Millimeter.
About Foot and Millimeter
The foot is defined as exactly 0.3048 meters (12 inches) under the 1959 international yard and pound agreement. US construction, real estate, and aviation altitude all run on feet. The millimeter is one thousandth of a meter. Engineering and manufacturing drawings in metric countries are dimensioned almost exclusively in millimeters to avoid decimal points. One Foot equals 304.8 Millimeter (1 ft = 304.8 mm). Foot to Millimeter conversion comes up most often in US construction and real estate floor plans and in aviation altitude worldwide, typically when figures need restating for engineering and CAD drawings.
Precision and Rounding: Length factors between metric and imperial units are exact by definition (1 ft = 0.3048 m since 1959), so any rounding error comes from display precision, not the factor. Two or three decimal places suit carpentry and DIY work; machining and surveying often require four or more.
Conversion factors per NIST Special Publication 811 and the BIPM SI Brochure (9th edition) (reference).
Worked Example
15 Foot equals 4572 Millimeter.
15 ft × 304.8 = 4572 mm
FAQ
How do I convert Foot to Millimeter?
Multiply the Foot value by 304.8 to get the equivalent value in Millimeter.
What is the formula for Foot to Millimeter?
The formula is mm = ft × 304.8.
How many Millimeter are in 1 Foot?
1 Foot equals 304.8 Millimeter.
Can I convert Millimeter back to Foot?
Yes. 1 Millimeter equals 0.003280839895 Foot, and the related converter can reverse the calculation.
What are common names for Foot and Millimeter?
Foot is shown as ft and may also be searched as feet, foot. Millimeter is shown as mm and may also be searched as millimetre, millimeters, millimetres.
Was this page helpful?
Let us know if this converter met your needs.