MM to Inches Converter
Instantly calculate! Your online conversion tool to easily convert millimeters to inches. Perfect for international measurements, engineering projects, woodworking, and everyday use. Simply enter your value and get accurate results immediately.
How to Convert MM to Inches
inches = mm ÷ 25.4
1 mm = 0.03937 inches
1 inch = 25.4 mm
Example: convert 100 mm to inches:
100 mm = 100 ÷ 25.4 = 3.937 inches
1 mm = 0.03937 inches
1 inch = 25.4 mm
Example: convert 100 mm to inches:
100 mm = 100 ÷ 25.4 = 3.937 inches
MM to Inches
From millimeters to inches
0.03937
1 mm = 0.03937 in
Quick Conversion Table: MM to Inches
| MM | Inches |
|---|---|
| 1 | 0.039 |
| 2 | 0.079 |
| 3 | 0.118 |
| 4 | 0.157 |
| 5 | 0.197 |
| 6 | 0.236 |
| MM | Inches |
|---|---|
| 7 | 0.276 |
| 8 | 0.315 |
| 9 | 0.354 |
| 10 | 0.394 |
| 15 | 0.591 |
| 20 | 0.787 |
| MM | Inches |
|---|---|
| 25 | 0.984 |
| 50 | 1.969 |
| 100 | 3.937 |
| 150 | 5.906 |
| 200 | 7.874 |
| 254 | 10 |
| mm | inches | mm | inches | mm | inches | mm | inches |
|---|
About the Units
Millimeter (mm)
A millimeter is a unit of length in the metric system, equal to one-thousandth of a meter (0.001 m). It is the standard unit for precise measurements in engineering, manufacturing, and scientific applications worldwide.
Inch (in)
An inch is a unit of length in the imperial and United States customary systems of measurement. It is defined as exactly 25.4 millimeters. The inch is commonly used in the United States, Canada, and the United Kingdom for everyday measurements.
Frequently Asked Questions
How many inches is 1 mm?
1 mm is equal to 0.03937 inches (or approximately 1/25.4 of an inch).
How do I convert mm to inches?
To convert millimeters to inches, divide the mm value by 25.4. For example, 50 mm = 50 ÷ 25.4 = 1.969 inches.
What is the formula for mm to inches?
The formula is: inches = millimeters ÷ 25.4.
How many mm is 1 inch?
1 inch equals exactly 25.4 millimeters.
What is 10 mm in inches?
10 mm equals approximately 0.394 inches (or about 3/8 inch).
How to convert inches to mm?
To convert inches to millimeters, multiply the inch value by 25.4. For example, 2 inches = 2 × 25.4 = 50.8 mm.
Why is 1 inch equal to 25.4 mm?
In 1959, the inch was officially defined as exactly 25.4 millimeters by international agreement. This standardized the relationship between metric and imperial units.
What is 25 mm in inches?
25 mm equals approximately 0.984 inches (very close to 1 inch).
What is 100 mm in inches?
100 mm equals approximately 3.937 inches (about 4 inches).
When should I use mm vs inches?
Use millimeters for metric countries and precision work. Use inches in the US, UK, and Canada for everyday measurements, construction, and certain industries.