How to Read a Metric Micrometer

Now let’s put all of this together and try to figure out what the micrometer below is reading.

micrometer reading 1

First the barrel scale:  count over from the 10…11… and 12.  So it’s 12 mm plus something. The “something” comes from the thimble scale.  Remember we will read the thimble scale as two decimal places.  So starting with the thirty (printed on the thimble) we count up to 33 before we get to the horizontal line we are reading from.  So the barrel reads 12 mm and the thimble reads 0.33 mm.  It may be a good idea to write down what each scale is reading and then add them together like this…

micrometer reading explained

This is pretty obvious for this reading, but it will help explain the next concept.

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15 Responses

  1. Bisola says:

    Do you have any practice sheets for reading a micrometer? (Your videos and reading a vernier caliper and micrometer were very helpful by the way)

  2. Anindya Mondal says:

    Quite good explanation & is very useful. Better if that were more .

  3. Abdu says:

    Like it a lot , hope you can add a practice sheers soon

  4. BITTY says:


  5. Anzdanial says:

    Helped a lot!!

  6. Hasim Rawther says:

    Excellent site giving learning tutorials in the simple way.
    God bless you

  7. Annie Bemford says:

    Thank you very much this has helped a lot

  8. Alina Valentina Penca says:

    Veeery useful! tHANK YOU!

  9. Pranav P Patil says:

    Sir, can you provide us practice sheets? It will be helpful for us.

  10. Kathryn says:

    Very helpful in preparing for the Certified Quality Technician exam! Thank you!

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