There are way too many conversion factors for all to be listed.
There are thousands of conversion factors and it is not possible to list them all. There are over 30 units of length listed in Wikipedia "unit of length" - some are more common than others but most are in use. The count does not include the 20 or so SI prefices (milli, centi, kilo etc), making around 50 units in all. Each pair of measurement units will have two conversion factor: from A to B and from B to A. So just lengths will give rise to approx 50*50 (or 2500) conversion factors. Then there are measures for area, volume, mass, weight, force, work, ...
The study of metric system and units are important as it give a simple conversion factors. Metric units always goes by the powers of 10 that the calculations becomes easier to deal with than imperial where the conversion factors differ by its units.
An empirical conversion factor.
a conversion factor conversion factors people!i mean come on i am 12 and you are probably older than me and i no the answer!woo hooo! i am smartical!;) haha conversion factor!
To change from one SI prefix to another, we use the conversion factor of 10 raised to the power of the difference between the two prefixes. For example, to convert from centimeters (10^-2) to meters (10^0), we use a conversion factor of 10^2. Simply multiply the value by this conversion factor to make the conversion.
A conversion factor is used to convert from one unit of measurement to another.
Once you look up the conversion factor, it is just a matter of multiplication.
Two conversion factors can be made from one equivalence statement. But there may be up to 4 or 5 (depends).
The effect of multiplying a given measurement by one or more conversion factors the value may be changed.
That's an infinite list.
Normally, you do not choose them: you calculate them.