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The micrometer is a square is divided into 100 squares at 10 X 10.
The sizes in the table below are the length of a side.
| 10X | 25X | 40X | 100X | ||
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entire grid box |
1 mm | 0.372 mm 372 um |
0.25 mm 250 um |
0.1 mm 100 um |
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each box |
0.1 mm 100 um |
0.037 mm 37 um |
0.025 mm 25 um |
0.01 mm 10 um |
On the linear scale at the edge, the line spacing is 1/10 of each box.
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