Feet+Inches (ft+in) to millimeters (mm) conversion calculator and how to convert.
Length Unit Converter
Convert between imperial and metric measurements with precision
Feet+Inches to Millimeters
Result will appear here
Millimeters to Feet+Inches
Result will appear here
Quick Reference
Common Conversions:
- 1 foot = 304.8 millimeters
- 1 inch = 25.4 millimeters
- 1 meter = 3 feet 3.37 inches
Practical Examples:
- 5′8″ (Average US male height) = 1727.2 mm
- 1000 mm = 3′3.37″ (Approx. 1 meter)
- 2438 mm = 8′0″ (Standard door height)
About Length Units
This converter helps translate between imperial measurements (feet and inches) and metric measurements (millimeters). It's useful for:
- Construction and carpentry projects
- Interior design and furniture measurements
- Converting between international specifications
- Anthropometric measurements (human body dimensions)
The converter handles decimal inches for precise measurements and can display results in multiple formats including fractional inches.
Unit converter tool • Updated May 2025
How to convert feet+inches to millimeters
1 foot is equal to 304.8 millimeters:
1 ft = 304.8 mm
1 inch is equal to 25.4 millimeters:
1 in = 25.4 mm
The distance d in millimeters (mm) is equal to the distance d in feet (ft) times 30.48 plus the distance d in inches (in) times 25.4:
d(mm) = d(ft) × 304.8 + d(in) × 25.4
Example
Convert 2 feet + 3 inches to millimeters:
d(mm) = 2ft × 304.8 + 3in × 25.4 = 685.8mm
Feet+inches to millimeters conversion table
| Feet (ft) + Inches (in) | millimeters (mm) | |
|---|---|---|
| 0 ft | 0 in | 0 mm |
| 0 ft | 1 in | 25.4 mm |
| 0 ft | 2 in | 50.8 mm |
| 0 ft | 3 in | 76.2 mm |
| 0 ft | 4 in | 101.6 mm |
| 0 ft | 5 in | 127.0 mm |
| 0 ft | 6 in | 152.4 mm |
| 0 ft | 7 in | 177.8 mm |
| 0 ft | 8 in | 203.2 mm |
| 0 ft | 9 in | 228.6 mm |
| 0 ft | 10 in | 254.0 mm |
| 0 ft | 11 in | 279.4 mm |
| 1 ft | 0 in | 304.8 mm |
| 2 ft | 0 in | 609.6 mm |
| 3 ft | 0 in | 914.4 mm |
| 4 ft | 0 in | 1219.2 mm |
| 5 ft | 0 in | 1524.0 mm |
| 6 ft | 0 in | 1828.8 mm |
| 7 ft | 0 in | 2133.6 mm |
| 8 ft | 0 in | 2438.4 mm |
| 9 ft | 0 in | 2743.2 mm |
| 10 ft | 0 in | 3048.0 mm |
| 20 ft | 0 in | 6096.0 mm |
| 30 ft | 0 in | 9144.0 mm |
| 40 ft | 0 in | 12192.0 mm |
| 50 ft | 0 in | 15240.0 mm |
| 60 ft | 0 in | 18288.0 mm |
| 70 ft | 0 in | 21336.0 mm |
| 80 ft | 0 in | 24384.0 mm |
| 90 ft | 0 in | 27432.0 mm |
| 100 ft | 0 in | 30480.0 mm |
