The micrometer, often referred to as a “micron,” is an incredibly small unit of measurement in the metric system, equal to one-millionth of a meter. It’s fascinating to realize that even though micrometers are invisible to the naked eye, they are pivotal in fields like microbiology and nanotechnology. For instance, the average human hair is about 70 to 100 micrometers thick, putting into perspective just how minuscule this unit is.
Moreover, precision engineering heavily relies on micrometer measurements to create components for electronics and watchmaking, where even the slightest deviation can lead to a malfunction. The ability to measure such tiny dimensions has revolutionized industries, enabling the production of finely-tuned machinery and advancing scientific research at a molecular level.
The inch, once the size of a barleycorn kernel, has fascinating origins. Early English measurement systems based it on the width of a man’s thumb. In the 14th century, King Edward II of England formalized it, defining an inch as the length of three barleycorns laid end to end. Historically, the inch was crucial for countless innovations, especially in Anglo-Saxon countries, influencing everything from watchmaking to industrial design.
Today, the inch still plays an integral role in areas like screen sizes and standardized paper dimensions, delighting both tech enthusiasts and everyday users. Interestingly, in surveying, an inch is divided into hundredths in the US, showing its adaptability in precision tasks. Despite the global shift towards the metric system, the inch endures, showcasing its resilience and continued relevance.
| Micrometers | Inches |
|---|---|
0
μm
|
0
in
|
10
μm
|
0.000393701
in
|
20
μm
|
0.000787402
in
|
30
μm
|
0.0011811
in
|
40
μm
|
0.0015748
in
|
50
μm
|
0.0019685
in
|
60
μm
|
0.0023622
in
|
70
μm
|
0.00275591
in
|
80
μm
|
0.00314961
in
|
90
μm
|
0.00354331
in
|
100
μm
|
0.00393701
in
|
110
μm
|
0.00433071
in
|
120
μm
|
0.00472441
in
|
130
μm
|
0.00511811
in
|
140
μm
|
0.00551181
in
|
150
μm
|
0.00590551
in
|
160
μm
|
0.00629921
in
|
170
μm
|
0.00669291
in
|
180
μm
|
0.00708661
in
|
190
μm
|
0.00748032
in
|
200
μm
|
0.00787402
in
|
210
μm
|
0.00826772
in
|
220
μm
|
0.00866142
in
|
230
μm
|
0.00905512
in
|
240
μm
|
0.00944882
in
|
250
μm
|
0.00984252
in
|
260
μm
|
0.0102362
in
|
270
μm
|
0.0106299
in
|
280
μm
|
0.0110236
in
|
290
μm
|
0.0114173
in
|
300
μm
|
0.011811
in
|
310
μm
|
0.0122047
in
|
320
μm
|
0.0125984
in
|
330
μm
|
0.0129921
in
|
340
μm
|
0.0133858
in
|
350
μm
|
0.0137795
in
|
360
μm
|
0.0141732
in
|
370
μm
|
0.0145669
in
|
380
μm
|
0.0149606
in
|
390
μm
|
0.0153543
in
|
400
μm
|
0.015748
in
|
410
μm
|
0.0161417
in
|
420
μm
|
0.0165354
in
|
430
μm
|
0.0169291
in
|
440
μm
|
0.0173228
in
|
450
μm
|
0.0177165
in
|
460
μm
|
0.0181102
in
|
470
μm
|
0.0185039
in
|
480
μm
|
0.0188976
in
|
490
μm
|
0.0192913
in
|
500
μm
|
0.019685
in
|
510
μm
|
0.0200787
in
|
520
μm
|
0.0204724
in
|
530
μm
|
0.0208661
in
|
540
μm
|
0.0212598
in
|
550
μm
|
0.0216535
in
|
560
μm
|
0.0220472
in
|
570
μm
|
0.0224409
in
|
580
μm
|
0.0228346
in
|
590
μm
|
0.0232283
in
|
600
μm
|
0.023622
in
|
610
μm
|
0.0240157
in
|
620
μm
|
0.0244094
in
|
630
μm
|
0.0248032
in
|
640
μm
|
0.0251969
in
|
650
μm
|
0.0255906
in
|
660
μm
|
0.0259843
in
|
670
μm
|
0.026378
in
|
680
μm
|
0.0267717
in
|
690
μm
|
0.0271654
in
|
700
μm
|
0.0275591
in
|
710
μm
|
0.0279528
in
|
720
μm
|
0.0283465
in
|
730
μm
|
0.0287402
in
|
740
μm
|
0.0291339
in
|
750
μm
|
0.0295276
in
|
760
μm
|
0.0299213
in
|
770
μm
|
0.030315
in
|
780
μm
|
0.0307087
in
|
790
μm
|
0.0311024
in
|
800
μm
|
0.0314961
in
|
810
μm
|
0.0318898
in
|
820
μm
|
0.0322835
in
|
830
μm
|
0.0326772
in
|
840
μm
|
0.0330709
in
|
850
μm
|
0.0334646
in
|
860
μm
|
0.0338583
in
|
870
μm
|
0.034252
in
|
880
μm
|
0.0346457
in
|
890
μm
|
0.0350394
in
|
900
μm
|
0.0354331
in
|
910
μm
|
0.0358268
in
|
920
μm
|
0.0362205
in
|
930
μm
|
0.0366142
in
|
940
μm
|
0.0370079
in
|
950
μm
|
0.0374016
in
|
960
μm
|
0.0377953
in
|
970
μm
|
0.038189
in
|
980
μm
|
0.0385827
in
|
990
μm
|
0.0389764
in
|
1000
μm
|
0.0393701
in
|
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