Feet to Millimeters Converter
1 foot = 304.8 millimeters
1 foot equals 304.8 millimeters
How to convert feet to millimeters
Feet, inches, yards and miles use the international foot (0.3048 m). Older US survey-foot records use a different definition; check the survey document before applying these factors.
mm = ft × 1524/5One foot is 1524/5 millimeters, so a single multiplication converts any value.
3,048 mm = 10 × 1524/5Feet to millimeters conversion table
Common values in feet, converted to millimeters.
| Feet (ft) | Millimeters (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 |
| 1,000 | 304,800 |
About these units
footft
Exactly 12 inches, or 0.3048 metres.
Reference: International Yard and Pound Agreement (1959).
millimetermm
One thousandth of a metre, the usual unit for engineering drawings.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.