Generally least count of micrometer varies instrument to instrument.. But common micrometers which are used in institute level laboratories have least count of 0.0001mm
In MKS unit system for length 1/1000 of a meter is termed as 1 Millimeter. and is measured with a screw guage of Least count 0.1, 0.2, 0.5 mm or with a vernier caliper of least count as given earlier or with a universal measuring machine of least count usually 1/2 micron or with a co-ordinate measuring machine of least count 10^-5 mm. If it is for fluid measurement 1/1000 part of a liter is called milliliter If it is time measurement 1/1000 of a second is called millisecond. In short 10^12 - tera 10^9 - giga 10^6 - mega 10^3 - Kilo 10^2 - hecto 10^1 - deca 10^-1 - deci 10^-2 - centi 10^-3 - milli 10^-6 - micro 10^-9 - nano 10^-12 - pico and so on.
look when u start ur stop watch if u get reading as 0.00 , then the least value measured by watch wiil be 0.01 ....which is ur least count...
0.01mm
o.1cm
1/16
.02mm
micro meter least count in British system
The least count of a half meter rod is 0.5 cm. This means that the rod can be measured in increments of 0.5 cm, allowing for precise measurements.
The least count of a standard meter ruler is typically 1 millimeter. This means that the smallest distance that can be measured accurately on the ruler is 1 millimeter.
The least count of a half meter scale is 0.5 cm. This means that the smallest measurement that can be accurately obtained using the scale is 0.5 cm.
The least count of a meter rod is typically 1 millimeter (mm), which is equivalent to 0.001 meters. This means the smallest measurement that can be accurately read using a standard meter rod is 0.001 meters. However, some meter rods may have finer divisions, allowing for more precise measurements.
Mega-meter is larger than a Micro-meter. Every 1 mega- meter equals 1,000,000,000,000 micro-meter.
Least count is the smallest form of measurement that a specific measuring instrument can accurately measure by. So meter stick uses 1m and 100cm and 1000mm. Thus mm is the least count for a meter stick.
1,000,000. "Micro-" means one millionth.
1 millimetres is 1000 micrometres
If you mean the metric subdivisions, I suggest you search for "SI prefixes". Some extremely small prefixes are used, but they would normally not be used in your daily life for measuring lengths. The smallest divisions that are normally marked on a meter scale are the millimeters.
(100 milli-S/meter) x (1,000 micro-S/milli-S) x (1 meter/100 cm) = 1,000 micro-S per cm