The least count of an instrument is the smallest measurement that can be taken accurately Vernier callipers, an instrument for making very accurate linear. Vernier caliper least count formula is calculated by dividing smallest reading of main scale with total number of divisions of vernier scale. Least Count plays an important role in measurement devices like Vernier Caliper. This blog explains the procedure of calculating the least count of the metric.

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Zero error can be negative or positive. By using this site, you agree to the Terms of Use and Privacy Policy. Friedenwald, ; page 1. Instruments of higher precision can reduce the least count error. Leave a Reply Cancel reply Your email address will not be published. Zip lock Bag 8 x 10 cm – Pack of The thickness or external diameter of an object. Measured values are good only up to this value.

Least count – Wikipedia

The main scale is graduated is centimeter while Vernier scale slides along the main scale and is graduated in division less than the millimeter. Any measurement made by the instrument can be considered repeatable to no less than the resolution of the least count.

Difference between potentiometer and voltmeter in tabular form. How to calculate the least count of the metric vernier caliper?


For example, a sundial may only have scale marks representing the hours of daylight; it would have a least count of one hour. It is used by the lathe mechanic for making metallic cylinders of different sizes. From Wikipedia, the free encyclopedia.

A Vernier scale on caliper may have a least count of 0. Divide 1 cm into that much number of divisions; the value obtained is the least count of the main scale in cm. Least count of an instrument is one of the very important tools in order to get accurate readings of instruments like vernier caliper and screw gauge used in various experiments.

Count the number of divisions on the Vernier scale. By repeating the observations and taking the arithmetic mean of the result, the mean value would be very close to the true value of the measured quantity. Comments Created By If the zero of the Vernier scale is to the right of the zero of the main scale then the error is positive.

Since the zero error is positive, the zero correction will be negative. Parts and function of vernier calliper Vernier Calliper least count Vernier calliper least count formula in mm Vernier calliper zero error What is the vernier calliper?

This Blog is Taggged: Knowledge Bank Home Hand tools How to calculate the least count of the metric vernier caliper? Least count uncertainty is one of the sources of experimental error in vrrnier. This site uses Akismet to reduce spam. The least count of measuring device plays an important role for measurement. We can learn about the use of V.


The movable jaws are attached to the vernier and they slide along the main scale. The stopwatch is more precise at measuring time intervals than the sundial because it has more “counts” scale intervals in each hour of elapsed time. In metrologythe least count of a measuring instrument is the smallest change in the measured quantity that can be resolved on the instrument’s scale. A stopwatch leats to time a race might lewst down to a hundredth of a second, its least count.

Least count

Use a magnifying glass if necessary. Number of divisions on Vernier scale: In most Vernier calipers, the Vernier scale has 10 divisions.

To get the least count of the main scale, count the number of divisions on the main scale in one cm of it. Since the least count of the Vernier caliper is 0.

The lower jaws A and B are used to measure length. Vernier caliper least count formula is calculated by dividing smallest reading of main scale with total number of divisions gernier vernier scale. Zip lock Bag 15 x 20 cm – Pack of The main scale is calibrated in millimeters.