millimeters to inches
1 millimeter (mm) equals 0.0394 inches (in). Type a value into either box below for an instant two-way conversion. For other units, use the full unit converter.
Chinese version: 毫米转英寸
Conversion factor
1 mm = 0.0394 in
Reverse: 1 in = 25.4 mm
mm to in conversion table
| mm | in | Detail |
|---|---|---|
| 1 | 0.0394 | 1 mm to in |
| 2 | 0.0787 | 2 mm to in |
| 3 | 0.1181 | 3 mm to in |
| 4 | 0.1575 | 4 mm to in |
| 5 | 0.1969 | 5 mm to in |
| 6 | 0.2362 | 6 mm to in |
| 7 | 0.2756 | 7 mm to in |
| 8 | 0.315 | 8 mm to in |
| 9 | 0.3543 | 9 mm to in |
| 10 | 0.3937 | 10 mm to in |
| 20 | 0.7874 | 20 mm to in |
| 25 | 0.9843 | 25 mm to in |
| 25.4 | 1 | 25.4 mm to in |
| 30 | 1.181 | 30 mm to in |
| 40 | 1.575 | 40 mm to in |
| 50 | 1.969 | 50 mm to in |
| 60 | 2.362 | 60 mm to in |
| 70 | 2.756 | 70 mm to in |
| 80 | 3.15 | 80 mm to in |
| 90 | 3.543 | 90 mm to in |
| 100 | 3.937 | 100 mm to in |
| 150 | 5.906 | 150 mm to in |
| 200 | 7.874 | 200 mm to in |
| 250 | 9.843 | 250 mm to in |
| 300 | 11.81 | 300 mm to in |
| 400 | 15.75 | 400 mm to in |
| 500 | 19.69 | 500 mm to in |
| 600 | 23.62 | 600 mm to in |
| 700 | 27.56 | 700 mm to in |
| 800 | 31.5 | 800 mm to in |
| 900 | 35.43 | 900 mm to in |
| 1,000 | 39.37 | 1,000 mm to in |
| 1,500 | 59.06 | 1,500 mm to in |
| 2,000 | 78.74 | 2,000 mm to in |
| 2,500 | 98.43 | 2,500 mm to in |
| 5,000 | 196.85 | 5,000 mm to in |
How to convert
To convert millimeters to inches, multiply: in = mm × 0.0394
To convert inches to millimeters, divide: mm = in ÷ 0.0394 (equivalently × 25.4).
Example: 25.4 millimeter × 0.0394 = 1 inches. The factor is derived from the international definition of each unit; results are shown to 4 significant figures.
Frequently asked questions
More conversions
Disclaimer: conversion factors are derived from international unit definitions and results are for reference only. For trade settlement, engineering or legal documents, follow the contract or official metrology standards.