长度是一个基本的物理量，可测量两个点之间的距离。它是国际单元（SI）中的七个基本单元之一，仪表（m）是其基本单元。
1 in = 25,400 µm
1 µm = 3.9370e-5 in
例子:
将15 英寸转换为千分尺：
15 in = 381,000 µm
| 英寸 | 千分尺 |
|---|---|
| 0.01 in | 254 µm |
| 0.1 in | 2,540 µm |
| 1 in | 25,400 µm |
| 2 in | 50,800 µm |
| 3 in | 76,200 µm |
| 5 in | 127,000 µm |
| 10 in | 254,000 µm |
| 20 in | 508,000 µm |
| 30 in | 762,000 µm |
| 40 in | 1,016,000 µm |
| 50 in | 1,270,000 µm |
| 60 in | 1,524,000 µm |
| 70 in | 1,778,000 µm |
| 80 in | 2,032,000 µm |
| 90 in | 2,286,000 µm |
| 100 in | 2,540,000 µm |
| 250 in | 6,350,000 µm |
| 500 in | 12,700,000 µm |
| 750 in | 19,050,000 µm |
| 1000 in | 25,400,000 µm |
| 10000 in | 254,000,000 µm |
| 100000 in | 2,540,000,000 µm |
规则