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

difference between twilight and duskexamples of auditory imagerydifferences between eukaryotic and prokaryotic translationthe definition of third person omniscientdifference between phagocytosis and pinocytosishow to calculate displacement physicsintroverts characteristicsaccommodation assimilationsignificance of angle of reposeaccuracy of micrometerdiabetes mellitus and diabetes insipidusdefine blank verserutherford experiment gold foildrank versus drunkadelpho parasitescientific definition of dorkdifference lime and lemondifference between avenge and revengelight and electron microscopes differencesacronym mnemonic devicefable vs folktaledifference between angiosperms and gymnospermsthymine structureisotonic and isometricrelationship between percent transmittance and absorbancedifference between radio waves and microwavesdifference between angina and myocardial infarctionwhat is the difference between drama and theatredefinition of tension in physicsdefinition of autosomemagnitude of displacement calculatortourist refund scheme sydneywhat is the cpi formulaexamples of manmade disastersthermosetting polymer propertieswhat is the meaning of assonance in poetryamongst among grammarindicative mood sentence examplesdifference between aromatic and aliphatichetzel and gretelmalt vs milkshakedifference between grill and bakepure gold zari sareesexamples of thermosetting plastics and thermoplasticsmitosis and meiosis stagesdifference between hypothyroid and hyperthyroidmoan and groan meaningwhat is flat character in literaturedifferentiate between ethics and moralitysucrose bondwhat is the difference between verbal irony and sarcasmalphahelixproducer consumer surplusresonance structures of co3figurative sentence examplescalculating consumer price index examplehow do i calculate cpibullying vs teasingoperant conditioning diagramdifference between pansexual and bilamarck vs darwindefinition of co enzymemeaning condescendingagoraphobia and social phobiaisotropic and anisotropic solidssn2 vs sn1is oatmeal considered wheatlist of helping verbs and linking verbsflocculation and coagulationwhat is the function of a helping verbwhat is stanza in poetrybit rate and bandwidthexamples of heterogeneous substancesdifferences between chrome and chromiumwhat is the difference between autism and down syndromedifference between emigrant and immigrantdifference between mercy and gracewhat is structuralism psychologydifference between turtles and tortoisedifference between bread crumbs and pankotranscription in prokaryotes vs eukaryoteswhat igbt stand fordifference between algae and bryophytesdifference between purine and pyrimidine