Millimeter to Inch Converter
Conversion Formula
Factor
Formula
About Millimeter
The millimeter is a unit of length equal to one-thousandth of a meter. It is used for precise measurements.
Facts About Millimeters
- 1 millimeter = 0.001 meters
- 1 millimeter = 0.1 centimeters
- 1 millimeter ≈ 0.03937 inches
- 10 millimeters = 1 centimeter
Common Uses
- Precision engineering
- 3D printing specifications
- Rainfall measurements
- Medical measurements
- Jewelry dimensions
History
The millimeter was introduced as part of the metric system in 1795 during the French Revolution. The prefix "milli-" comes from the Latin word "mille," meaning one thousand. The metric system was designed to provide a decimal-based system of measurement that was easy to use and understand.
Since 1983, the meter has been defined as "the length of the path travelled by light in a vacuum during a time interval of 1/299,792,458 of a second." A millimeter, being 1/1000 of a meter, is the distance light travels in 1/299,792,458,000 of a second.
About Inch
The inch is a unit of length in the imperial and US customary systems. It is defined as exactly 2.54 centimeters.
Facts About Inches
- 1 inch = 2.54 centimeters
- 1 inch = 25.4 millimeters
- 12 inches = 1 foot
- 36 inches = 1 yard
Common Uses
- Screen sizes (TVs, monitors, phones)
- Tire and wheel sizes
- Construction lumber (2x4, etc.)
- Paper sizes (US Letter = 8.5 x 11 inches)
- Rainfall measurements in the US
History
The inch has been used since ancient times. The word "inch" derives from the Latin word "uncia," meaning "one-twelfth," which was also the name of a Roman unit. The inch was originally defined as the width of a man's thumb at the base of the nail.
In 1959, the international yard and pound agreement defined the inch as exactly 25.4 millimeters (2.54 centimeters), establishing a standard conversion between imperial and metric systems. This definition is now used universally in the United States, United Kingdom, Canada, Australia, New Zealand, and South Africa.
Conversion Table
Millimeter(mm) | Inch(in) |
|---|---|
1 | 0.0393701 |
2 | 0.0787402 |
3 | 0.11811 |
4 | 0.15748 |
5 | 0.19685 |
6 | 0.23622 |
7 | 0.275591 |
8 | 0.314961 |
9 | 0.354331 |
10 | 0.393701 |
Conversion Examples
Convert 1 Millimeter to Inch
- Conversion Factor: 1 mm = 0.0393701 in
- Conversion Formula: in = mm ÷ 25.4
- Calculation: 1 mm ÷ 25.4 = 0.0393701 in
Convert 10 Millimeter to Inch
- Conversion Factor: 1 mm = 0.0393701 in
- Conversion Formula: in = mm ÷ 25.4
- Calculation: 10 mm ÷ 25.4 = 0.393701 in
Convert 100 Millimeter to Inch
- Conversion Factor: 1 mm = 0.0393701 in
- Conversion Formula: in = mm ÷ 25.4
- Calculation: 100 mm ÷ 25.4 = 3.93701 in
Convert 1,000 Millimeter to Inch
- Conversion Factor: 1 mm = 0.0393701 in
- Conversion Formula: in = mm ÷ 25.4
- Calculation: 1,000 mm ÷ 25.4 = 39.3701 in