Convert feet to millimeters for precision engineering, construction blueprints, and manufacturing tolerances. Accurate calculator with 1 ft = 304.8 mm exactly.
1 foot equals 304.79999024640034 millimeter
Formula: mm = ft × 304.800
Converting feet to millimeters is essential in precision engineering and manufacturing where metric specifications are required. With 1 foot equaling exactly 304.8 millimeters, accuracy is critical—even small errors can cause parts to fail tolerance checks or compromise structural integrity in construction projects.
In manufacturing and engineering, millimeter precision determines whether components fit together correctly. A 0.1mm error across multiple parts can cascade into assembly failures. Construction blueprints often specify dimensions in both imperial and metric units; incorrect conversion can result in structural defects, safety hazards, or costly rework. Medical device manufacturing, aerospace engineering, and precision tooling all depend on exact foot-to-millimeter conversions.
Machinists and CNC programmers convert imperial tool specifications to metric machine settings. When international manufacturers receive US-designed parts with foot measurements, they must convert to millimeters for their metric machinery. Tolerance specifications like ±0.005 feet must convert to ±0.15 mm, and errors directly affect product quality and fit.
Architects and construction engineers working on international projects must convert US imperial blueprints to metric specifications for European or Asian contractors. Building codes in metric countries require all dimensions in millimeters. A single conversion error can affect room dimensions, door frames, or structural elements across an entire building.
| feet | millimeters |
|---|---|
| 1 ft | 304.79999 mm |
| 2 ft | 609.59998 mm |
| 5 ft | 1523.999951 mm |
| 10 ft | 3047.999902 mm |
| 20 ft | 6095.999805 mm |
Formula: mm = ft × conversion factor
The foot is a widely used unit for measuring length. It is commonly used in various applications and industries worldwide.
The millimeter is a widely used unit for measuring length. It is commonly used in various applications and industries worldwide.
This foot to millimeter converter uses high-precision conversion factors to ensure accurate results for professional and academic use.
Our calculator provides results with up to 10 decimal places for maximum accuracy.
Exactly 304.8 millimeters. This precise relationship was internationally standardized in 1959. To convert any number of feet to millimeters, multiply by 304.8. For example: 5 feet × 304.8 = 1,524 millimeters. This exact factor ensures compatibility between imperial and metric systems in engineering and manufacturing.
The foot was defined as exactly 0.3048 meters in 1959 through the International Yard and Pound Agreement. Since a millimeter is one-thousandth of a meter, 0.3048 meters × 1,000 = 304.8 millimeters exactly. This seemingly odd number actually represents perfect precision—it's the result of defining the foot relative to the meter standard, ensuring both imperial and metric measurements are mathematically compatible.
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