Millimeters to Inches Converter
Convert small mm measurements to inches.
Result
0
Inches
1 Millimeters = 0.0393701 Inches
How to convert Millimeters to Inches?
How many Inches are in a Millimeters? The key relationship is:
- 1 Inch = 25.4 Millimeters
- 1 Millimeter = 0.0393701 Inches
To convert Millimeters to Inches, multiply by 0.0393701 (or divide by 25.4).
Formula: Inches = Millimeters × 0.0393701
Step-by-Step Calculation
- Take the number of Millimeters you want to convert (e.g., 50).
- Multiply that value by 0.0393701.
- The result is the value in Inches. (Example: 50 × 0.0393701 = 1.9685 Inches).
How to use this converter?
Enter millimeters and instantly get inches—useful for tools, parts, and small measurements.
Common Millimeters to Inches Conversions
Quick reference guide for common values.
1 mm = 0.0393701 inches
10 mm = 0.393701 inches
25.4 mm = 1 inch
50 mm = 1.9685 inches
100 mm = 3.93701 inches
150 mm = 5.90551 inches
200 mm = 7.87402 inches
300 mm = 11.811 inches
5 mm = 0.19685 inches
2 mm = 0.0787402 inches
History: Why is 1 inch = 25.4 mm?
Modern measurement standards define imperial units using metric equivalents, which is why 1 inch is defined as exactly 25.4 millimeters.
Common Millimeters to Inches Conversions
| Millimeters Input | Inches Result |
|---|---|
| 1 mm | 0.0393701 inches |
| 2 mm | 0.0787402 inches |
| 5 mm | 0.19685 inches |
| 10 mm | 0.393701 inches |
| 25.4 mm | 1 inch |
| 50 mm | 1.9685 inches |
| 100 mm | 3.93701 inches |
| 150 mm | 5.90551 inches |
| 200 mm | 7.87402 inches |
| 300 mm | 11.811 inches |
Frequently Asked Questions
How do I convert mm to inches?
Multiply millimeters by 0.0393701 (or divide by 25.4) to get inches.
How many inches is 25.4 mm?
25.4 mm equals exactly 1 inch.
How many inches is 10 mm?
10 mm equals 0.393701 inches.
How many inches is 100 mm?
100 mm equals 3.93701 inches.
Is the conversion exact?
Yes—because 1 inch is defined as exactly 25.4 mm.