Inch to Millimeter Converter
Convert Inch (in) to Millimeter (mm) instantly. Free online length conversion calculator.
About Inch
Symbol: in
Category: Length
Description
The inch (in) is a unit of length in the imperial system, equal to 1/12 of a foot or 2.54 centimeters exactly.
Common Uses
- Screen sizes (TV, phone, tablet)
- Pipe and lumber dimensions
- Clothing measurements
- Tool sizes
- Photography
Benefits
- Familiar in US and UK
- Good for small to medium measurements
- Standard in many industries
- Easy fractions (1/2, 1/4, etc.)
Quick Facts
- 1 inch = 2.54 cm exactly
- 1 foot = 12 inches
- Thumb width ≈ 1 inch
- Standard business card: 3.5 × 2 inches
About Millimeter
Symbol: mm
Category: Length
Description
The millimeter (mm) is a unit of length equal to one thousandth of a meter. It is part of the metric system and is commonly used for precise measurements.
Common Uses
- Engineering drawings and blueprints
- Medical measurements
- Manufacturing tolerances
- Jewelry and watch making
- Scientific measurements
Benefits
- High precision for small measurements
- Universal metric standard
- Easy conversion to other metric units
- Widely accepted in technical fields
Quick Facts
- 1 mm = 0.001 meters
- 1 inch = 25.4 mm exactly
- Human hair diameter: ~0.1 mm
- Credit card thickness: ~0.8 mm
Inch to Millimeter Conversion Table
| Inch | Millimeter |
|---|---|
| 1 in | 25.4 mm |
| 5 in | 127 mm |
| 10 in | 254 mm |
| 25 in | 635 mm |
| 50 in | 1270 mm |
| 100 in | 2540 mm |
| 500 in | 12700 mm |
| 1000 in | 25400 mm |
How to Convert Inch to Millimeter
To convert from Inch (in) to Millimeter (mm), multiply the value by 25.4.
Formula:
mm = in × 25.4
Example:
1 in = 25.4 mm