Convert Inch to Millimeter
1 inch = 25.4 millimeters (in to mm).
A inch is larger than a millimeter — one inch contains 25.4 millimeters. Both units describe length, and the reverse is just as easy — one millimeter equals 0.0393701 inches. The converter above does this in real time, and the reference chart lists the values that come up most often.
1 in = 25.4 mm
How to convert Inches to Millimeters
Multiply the inch value by 25.4 to get millimeters.
Example: 10 inches = 254 millimeters.
Inch to Millimeter Conversion Chart
| Inches | Millimeters |
|---|---|
| 1 in | 25.4 mm |
| 2 in | 50.8 mm |
| 3 in | 76.2 mm |
| 5 in | 127 mm |
| 10 in | 254 mm |
| 20 in | 508 mm |
| 25 in | 635 mm |
| 50 in | 1,270 mm |
| 100 in | 2,540 mm |
| 1000 in | 25,400 mm |
Frequently Asked Questions
- How many millimeters are in a inch?
- There are 25.4 millimeters in 1 inch.
- How do you convert inches to millimeters?
- Multiply the inch value by 25.4 to get millimeters.
- What is 5 inches in millimeters?
- 5 inches equals 127 millimeters.
- What is 100 inches in millimeters?
- 100 inches equals 2,540 millimeters.
- What is 1 millimeter in inches?
- 1 millimeter equals 0.039370079 inches.
- Is this inch to millimeter converter free?
- Yes. The converter is free, needs no sign-up, and runs entirely in your browser — the values you enter never leave your device.