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Formula
To convert millimeters to inches, multiply the number by 0.03937007874.
To go the other way, multiply inches by 25.4.
Example
Example: convert 50 mm to in.
50 × 0.03937007874 = 1.9685. So 50 mm is 1.9685 in.
Common values
millimeters to inches| mm | in |
|---|
| 1 mm | 0.0393701 in |
|---|
| 2 mm | 0.0787402 in |
|---|
| 3 mm | 0.11811 in |
|---|
| 4 mm | 0.15748 in |
|---|
| 5 mm | 0.19685 in |
|---|
| 6 mm | 0.23622 in |
|---|
| 8 mm | 0.314961 in |
|---|
| 10 mm | 0.393701 in |
|---|
| 12 mm | 0.472441 in |
|---|
| 15 mm | 0.590551 in |
|---|
| 20 mm | 0.787402 in |
|---|
| 25 mm | 0.984252 in |
|---|
| 25.4 mm | 1 in |
|---|
| 30 mm | 1.1811 in |
|---|
| 40 mm | 1.5748 in |
|---|
| 50 mm | 1.9685 in |
|---|
| 75 mm | 2.95276 in |
|---|
| 100 mm | 3.93701 in |
|---|
About millimeters and inches
A millimeter is one thousandth of a meter. An inch is exactly 25.4 millimeters.
Use millimeters for small parts, screws and drill bits. Many tools in the US use inches for the same sizes.
How to use it
- Type your number in the box.
- Check that From is millimeters and To is inches.
- Read the result. It changes as you type.
- Press Swap to convert the other way.
Questions
How many inches are in 1 millimeter?
1 millimeter is 0.03937007874 inches.
How do I convert millimeters to inches?
To convert millimeters to inches, multiply the number by 0.03937007874. To go the other way, multiply inches by 25.4.
How many mm are in an inch?
There are exactly 25.4 mm in 1 inch.