The least count of the vernier can be measured by using the formula stated below.
Least count (L.C) = 1 M.S.D - 1 V.S.D
Example;
vernier scale is constructed by taking 49 main scale divisions dividing them into 50 divisions
ie. 49mm divided into 50 parts
therfore
1 vsd=49/50 mm=0.98mm
1 MSD=1mm
substituting in formula
L.C = 1 M.S.D - 1 V.S.D
L.C=1-0.98=0.02mm
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