Feet to Millimeters (ft to mm) Converter & Formula
1 foot equals exactly 304.8 millimeters — multiply the number of feet by 304.8 to convert to millimeters. Millimeters are ideal for precise engineering and manufacturing work, and ByteTools applies the exact factor live as you type.
The formula
To convert feet to millimeters, multiply by the fixed factor 304.8:
mm = ft × 304.8
For example, 10 feet × 304.8 = 3,048 millimeters. To reverse it, divide by 304.8 (or multiply millimeters by 0.00328084).
Conversion table
| Feet (ft) | Millimeters (mm) |
|---|---|
| 1 | 304.8 |
| 2 | 609.6 |
| 5 | 1524 |
| 10 | 3048 |
| 25 | 7620 |
| 50 | 15240 |
| 100 | 30480 |
| 500 | 152400 |
| 1000 | 304800 |
How to convert online
- Type the number of feet into the first box.
- Read the millimeters result instantly in the second box.
- Type a millimeter value instead to convert back to feet — it works both ways.
Use the Foot to Millimeter Converter — free and instant in your browser.
Where this conversion is used
Feet-to-millimeter conversions are common in CAD and technical drawings, joinery and cabinetmaking, metal fabrication and any workshop where imperial plans meet metric machine settings. Millimeters give the fine resolution needed for tight tolerances.
FAQ
How many millimeters are in a foot?
One foot equals 304.8 millimeters. So 10 feet is 3,048 mm and 100 feet is 30,480 mm.
What is the formula to convert feet to millimeters?
Multiply feet by 304.8: mm = ft × 304.8. The converter applies this exact factor automatically.
How do I convert millimeters back to feet?
Divide by 304.8, or multiply millimeters by 0.00328084. For example, 1000 mm = 3.28084 feet.
Is the conversion exact?
Yes. Since a foot is exactly 0.3048 meters, and a meter is 1,000 millimeters, one foot is exactly 304.8 mm — no rounding involved.
Related converters
- Millimeter to Foot Converter
- Foot to Centimeter Converter
- Foot to Meter Converter
- Foot to Inch Converter
Built by ByteVancer
ByteTools is a free product of ByteVancer, a software and web development studio. If you need a custom web app, calculator or internal tool built for your business, ByteVancer can help — explore our services and get in touch.
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