Convert mm to inches
Please provide values below to convert millimeter [mm] to inch [in].
Millimeter (mm)
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
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 to Inch Conversion Table
| Millimeter [mm] | Inch [in] |
|---|---|
| 0.01 mm | 0.0003937008 in |
| 0.1 mm | 0.0039370079 in |
| 1 mm | 0.0393700787 in |
| 2 mm | 0.0787401575 in |
| 3 mm | 0.1181102362 in |
| 4 mm | 0.157480315 in |
| 5 mm | 0.1968503937 in |
| 6 mm | 0.2362204724 in |
| 7 mm | 0.2755905512 in |
| 8 mm | 0.3149606299 in |
| 9 mm | 0.3543307087 in |
| 10 mm | 0.3937007874 in |
| 20 mm | 0.7874015748 in |
| 50 mm | 1.968503937 in |
| 100 mm | 3.937007874 in |
| 1000 mm | 39.3700787402 in |
How to Convert Millimeter to Inch
1 mm = 0.0393700787 in
1 in = 25.4 mm
Example: convert 15 mm to in:
15 mm = 15 / 25.4 in = 0.5905511811 in