Convert Foot (ft) to Millimeter (mm) instantly. Enter any value and get the result immediately.
ft → mm Converter
| Foot (ft) | Millimeter (mm) |
|---|---|
| 0.1 ft | 30.48 mm |
| 0.5 ft | 152.4 mm |
| 1 ft | 304.8 mm |
| 2 ft | 609.6 mm |
| 5 ft | 1524 mm |
| 10 ft | 3048 mm |
| 20 ft | 6096 mm |
| 50 ft | 15,240 mm |
| 100 ft | 30,480 mm |
| 200 ft | 60,960 mm |
| 500 ft | 152,400 mm |
| 1000 ft | 304,800 mm |
| 5000 ft | 1,524,000 mm |
| 10000 ft | 3,048,000 mm |
Converting feet to millimeters is one of the most common cross-system unit conversions in construction, engineering, and manufacturing — where imperial measurements like feet are used for large-scale dimensions, but millimeters are the standard for precise detailed specifications. Since one foot equals exactly 304.8 millimeters, the conversion is simple: multiply the foot value by 304.8. Use the converter above for instant results, or follow the formula and examples below.
Step-by-step example — Convert 3 ft to millimeters:
Step-by-step example — Convert 0.5 ft (6 inches) to millimeters:
Foot (ft) is an imperial and US customary unit of length equal to exactly 12 inches or 0.3048 meters. Formally defined by international agreement, the foot is the standard unit for measuring human height in the United States, aircraft altitude worldwide, building floor heights, and terrain elevation on US-based maps and surveys. One foot is roughly the length of a standard 30 cm school ruler — a familiar, human-scale measurement used across everyday life, construction, and aviation.
Millimeter (mm) is a metric unit of length equal to one-thousandth of a meter (10⁻³ m) or one-tenth of a centimeter. The prefix "milli-" means one-thousandth in the SI system. Millimeters are the go-to unit for precise measurements in engineering drawings, woodworking, metalworking, medical devices, and product manufacturing. Common references include the thickness of a credit card (0.76 mm), the diameter of a standard pencil (7 mm), the width of a SIM card (15 mm), and the height of a standard door (2,032 mm or approximately 6.67 ft). One foot contains exactly 304.8 millimeters.
| Feet (ft) | Millimeters (mm) | Common Reference |
|---|---|---|
| 0.083 ft | 25.4 mm | 1 inch exactly |
| 0.5 ft | 152.4 mm | 6 inches (half a foot) |
| 1 ft | 304.8 mm | 1 foot exactly |
| 2 ft | 609.6 mm | Standard desk height (portion) |
| 3 ft | 914.4 mm | Standard kitchen countertop height |
| 4 ft | 1,219.2 mm | Half a standard drywall sheet |
| 6 ft | 1,828.8 mm | Tall adult male height (approx.) |
| 6.56 ft | 2,000 mm | Standard interior door height (2 m) |
| 8 ft | 2,438.4 mm | Standard ceiling height in homes |
| 10 ft | 3,048 mm | Basketball hoop regulation height |
There are exactly 304.8 millimeters in one foot. This is a fixed, internationally defined value: 1 ft = 304.8 mm.
The formula is: mm = ft × 304.8. Multiply any foot value by 304.8 to get the equivalent length in millimeters.
1 ft = 304.8 mm exactly. One foot is just under a third of a meter, and converting it to millimeters gives a precise figure commonly used in engineering and technical drawings.
1 mm = 0.003281 ft (approximately 3.281 × 10⁻³ feet). A single millimeter is a very small fraction of a foot — roughly the thickness of a credit card compared to the length of a ruler.
A foot is much larger than a millimeter. One foot equals 304.8 millimeters — making it over three hundred times larger than a single millimeter.
The foot is defined by international agreement as exactly 0.3048 meters. Since one meter equals 1,000 millimeters, one foot equals 0.3048 × 1,000 = 304.8 mm. This definition has been internationally standardized since 1959, ensuring consistent conversion across science, engineering, and trade worldwide.
This conversion is essential whenever US imperial measurements need to align with metric precision standards. For example, a wooden beam measured as 8 feet long must be entered as 2,438.4 mm in a metric CNC cutting program. Similarly, a door frame specified at 6.5 ft in an architectural plan must be converted to 1,981.2 mm when ordering metric-dimensioned door units from an international supplier. The ft to mm conversion bridges the gap between two widely used measurement systems in practical, everyday technical work.