Convert inches to mm
Please provide values below to convert inch [in] to millimeter [mm].
Inch
Definition: An inch (symbol: in or ″) is a unit of length in the imperial and United States customary measurement systems. One inch is equal to 25.4 millimeters or 2.54 centimeters.
Conversion Inch to Other Units:
- 1 inch = 25.4 mm
- 1 inch = 2.54 cm
- 1 inch = 0.0833 feet (1/12 ft)
- 1 inch = 0.0278 yards (1/36 yd)
Where is the Inch Used?
The inch is commonly used in the United States, Canada, and the United Kingdom for various measurements, including:
- Screen sizes (TVs, monitors, smartphones)
- Paper sizes (e.g., A4 paper margins)
- Clothing and shoe sizes
- Construction and carpentry (wood, pipes, nails)
- Engineering and manufacturing
What Can Be Measured in Inches?
- Heights of people (especially in the U.S.)
- Length of small objects (pencils, books, screens)
- Diameter of pipes, screws, and bolts
- Waist and clothing measurements
Millimeter
Definition: A millimeter (mm) is a unit of length in the metric system, commonly used for measuring small objects and precise dimensions. It is widely used in engineering, manufacturing, science, and everyday life.
1 millimeter =
0.001 meters (m)
0.1 centimeters (cm)
1,000 micrometers (µm)
1,000,000 nanometers (nm)
0.03937 inches (in)
Conversion Millimeter to Other Units:
- 10 mm = 1 cm
- 100 mm = 10 cm = 0.1 m
- 1,000 mm = 1 meter (m)
- 25.4 mm = 1 inch
Where is a Millimeter Used?
A millimeter (mm) is a very small unit of length, commonly used in fields requiring precision. It is especially useful for measuring objects that are too small for centimeters but too large for micrometers.
- Engineering & Manufacturing: Used for precise measurements of small components.
- Medicine: Used in medical tools and measurements (e.g., syringe needle sizes).
- Science & Microscopy: Helps measure small biological structures.
- Daily Life: Used in measuring jewelry, screws, phone thickness, etc.
What Can Be Measured with a Millimeter?
1. Science & Medicine:
- Medical tools & devices – Needle thickness, surgical instruments
- Biology – Cell sizes (although smaller units like micrometers are more common)
- Physics & Chemistry – Measuring wavelengths, thin films, or crystal structures
2. Engineering & Manufacturing:
- Machinery components – Screws, bolts, nuts, gears
- Electronics – Circuit boards, chip components, wire diameters
- Automotive industry – Tolerances in engine parts, brake pads
3. Construction & Architecture:
- Furniture & interior design – Cabinet gaps, door frame precision
- Glass cutting – Window and mirror thickness
- Flooring & tiling – Tile spacing, wood thickness
4. Daily Life Objects:
- Paper thickness – Standard printer paper is about 0.1 mm thick
- Credit card thickness – About 0.76 mm
- Jewelry measurements – Ring sizes, gemstone settings
- Hair thickness – Human hair is about 0.04–0.1 mm
5. Technology & Gadgets:
- Smartphones & laptops – Device thickness (e.g., an iPhone is around 7 mm thick)
- Camera lenses – Precision focus adjustments
Inch to Millimeter Conversion Table
Inch [in] | Millimeter [mm] |
---|---|
0.01 in | 0.254 mm |
0.1 in | 2.54 mm |
1 in | 25.4 mm |
2 in | 50.8 mm |
3 in | 76.2 mm |
5 in | 127 mm |
10 in | 254 mm |
20 in | 508 mm |
50 in | 1270 mm |
100 in | 2540 mm |
1000 in | 25400 mm |
How to Convert Inch to Millimeter
1 in = 25.4 mm
1 mm = 0.0393700787 in
Example: convert 15 in to mm:
15 in = 15 × 25.4 mm = 381 mm