Convert feet to millimeters
Converting feet to millimeters is a common length task, whether you are checking a recipe, a spec sheet, a travel distance or a homework problem. Since 1 ft equals 304.8 mm, the math is a single multiplication — and this page does it for you instantly, with the formula, a table of common values and answers to the questions people ask most.
Exact factor
How to convert feet to millimeters
To convert feet to millimeters, multiply the number of feet by 304.8. For example, 10 ft × 304.8 = 3,048 mm.
mm = ft × 304.8
- Write down the value in feet you want to convert.
- Multiply it by 304.8 (the exact ft→mm factor).
- The result is your value in millimeters. Check it below with the converter or the table.
Conversion table
Common values of feet and their equivalents in millimeters:
| ft | mm |
|---|---|
| 1 | 304.8 |
| 2 | 609.6 |
| 3 | 914.4 |
| 4 | 1,219.2 |
| 5 | 1,524 |
| 10 | 3,048 |
| 20 | 6,096 |
| 25 | 7,620 |
| 50 | 15,240 |
| 100 | 30,480 |
| 250 | 76,200 |
| 500 | 152,400 |
About these units
Foot (ft). A foot is an imperial unit defined as exactly 0.3048 meters, or 12 inches. It remains the common unit for human height, room dimensions and altitude in the US and UK.
Millimeter (mm). A millimeter is one thousandth of a meter, the smallest length unit in everyday metric use. It is the standard precision unit in engineering drawings, machining and rainfall measurement.
Frequently asked questions
How do I convert feet to millimeters?
To convert feet to millimeters, multiply the number of feet by 304.8. For example, 10 ft × 304.8 = 3,048 mm. Or skip the math: type the value into the converter at the top of this page and the result updates instantly.
How many millimeters are in 1 foot?
1 ft = 304.8 mm. That is the fixed relationship used by this converter and by international standards.
How many feet are in 1 millimeter?
1 mm = 0.00328084 ft. If you are converting in the opposite direction, use our Millimeter to Foot converter for the dedicated table and FAQ.
Is the feet to millimeters conversion exact?
Yes. Both units are defined by international agreement, so the factor of 304.8 is exact. Displayed results are rounded to 6 significant digits only for readability.
What is foot used for?
A foot is an imperial unit defined as exactly 0.3048 meters, or 12 inches. It remains the common unit for human height, room dimensions and altitude in the US and UK.