Difference Between Vernier Caliper and Micrometer

Main Difference – Vernier Caliper vs. Micrometer

Vernier calipers (vernier callipers) and Micrometers (Micrometer screw gauges) are both used to measure distances too small to be measured using a metre rule with a least count of 1 mm. The main difference between vernier caliper and micrometer is that the vernier caliper uses two sliding scales with different spacings between  markings on each scale while a micrometer makes use of a screw to translate small distances moved by its jaws to larger distances along the marked scale.

What is a Vernier Caliper, How to Read a Vernier Caliper

A vernier caliper consists of a sliding scale which is divided such that the distance between two marks on this scale is smaller than the distance between two marks on the main scale. To measure an object, the object is kept between the jaws and the vernier scale is moved. By looking at which mark on the vernier scale lines up with a mark on the main scale, the distance between the jaws could be read off to a higher precision than the least count of the main scale. For more details on how to read a vernier caliper, refer to the video posted below.

Typically, vernier calipers can measure lengths to a precision of 0.1 or 0.05 mm. Most vernier calipers are equipped with a set of smaller jaws for measuring internal diameters and a depth probe to measure depths. Digital vernier calipers come with a small display that shows the value directly, and their accuracy could be as high as 0.01 mm.

The diagram below shows a standard analogue set of vernier calipers. Specifically, note the numbered parts (1) outside jaws, (2) inside jaws, (3) depth probe, (4) main scale and (6) the vernier scale.

Difference Between Vernier Caliper and Micrometer - Vernier Calipers

A Vernier Caliper – How to read a vernier caliper

What is a Micrometer

In a micrometer, the object to be measured is placed between the jaws and the thimble is rotated until the jaws move together and clasp the object. A screw attached to the thimble rotates along with it and allows for precise values of distances to be read off from the scale. The video posted below explains how to read a micrometer.

A typical micrometer has a precision of 0.01 mm. For measuring inner diameters and depths, different types of micrometer are used.

The diagram below shows, from bottom to top an outside micrometer, an inside micrometer and a depth micrometer (note that these particular micrometers have been calibrated for the imperial system).

Difference Between Vernier Caliper and Micrometer - Micrometers

Difference Between Vernier Caliper and Micrometer – Micrometers

The video below explains how to read vernier calipers as well as micrometers:

It is important to remember that both micrometers and vernier calipers can give zero errors. Before measuring an object, it is always good practice to put the two jaws together and see whether the instrument gives a reading of 0. If this is not the case, the reading should be noted and should be added/subtracted to the measurement of the object.

What is the difference between Vernier Caliper and Micrometer

Working Principle of Vernier Caliper and Micrometer

Vernier calipers use a sliding vernier scale to measure small movements of its jaws.

Micrometers use a screw to amplify small movements of its jaws to larger movements of the rotating scale.

Possible Measurements

Vernier calipers typically allow a user to measure external diameters, internal diameters as well as depths.

Micrometers usually only allow users to measure external diameters. Other, more specialized types of micrometers are available for measuring internal diameters and depths.


Vernier Calipers traditionally have a precision of 0.1 or 0.05 mm. Digital vernier calipers have a precision of 0.01 mm.

Micrometers typically have a precision of 0.01 mm.

Image Courtesy
“Illustration of a vernier calipert” by Joaquim Alves Gaspar, modified by ed g2s (Own work) [], via
“Outside micrometer, inside micrometer, and depth micrometer.” by Splarka at English Wikipedia (Transferred from en.wikipedia to Commons by wikiwikiyarou.) [Public Domain], via

About the Author: Nipun

Related pages

what is the meaning of moaningwhat is the difference between dominant traits and recessive traitsdifference between sociology and anthropologyis cream and whipping cream the sameconscious or subconsciouspolygamy bigamypolar vs nonpolar substancesintensive pronounlist of metallic and nonmetallic mineralsbaking soda bicarbonate of soda differenceclays american systemreading a vernier micrometerdispersion forces examplescystineselectro magnet definitionfunction of radicle in seeddefinition of polar and nonpolar moleculeswhat is the difference between iodometry and iodimetrypinocytosis phagocytosiswhat is the difference between a goose and a geeseangular momentum and linear momentumdefinition of autosomesalaskan malamute vs siberian huskypoetic conceitwhat is an enjambment in poetryphotosystem 2 definitionwhat is the difference between resistance and reactancerelation between density and molaritytaugh meaningclassical definition of tragedytransitive and intransitive verbs differenceether definition chemistryesthetic definitionwhat is orthopnoeacysts and polypstranslation in prokaryotes and eukaryotesbean curd tofu differencevit b12 structurecrocodile and alligator differenceswhat is pail meanswhat is the difference between acne and pimplessources of mono and polyunsaturated fatsdifference between cbt and behavioral therapyexamples of polar moleculeproducer surplus diagramwhat is the difference between pollination and fertilizationsummary and paraphrase differencerebonding and straighteningcentrioles centrosomehow to find asymptotes of hyperbolasmethyl alcohol structural formulawhat is the difference between positive and negative accelerationchampagne versus winebicameral parliament definitiondefinition of unicellular and multicellular organismswhat are cilia and flagella composed ofsimilarities of operant and classical conditioningexamples of caesuraswhat is the difference between unicellular and multicellularhow is ethanoic acid madedifference between church and cathedraldiethyl ether polaritycharacteristics of unicellular and multicellular organismswhat is the difference between npn and pnp transistormelanocytes and melaninmaster of divinity vs master of theologydifference between syntax and grammardifference between asexual and sexualparadox and oxymoronhow to find the area of a heptagondefinition of internal respirationkaryokinesis definition