How Does Conversion Of Units From Metric To English System Affect The Level Of Accuracy?

For linear measurement 1 inch = 2.54 centimeters EXACTLY   so there is no effect on accuracy.
Because dry volume is based on inches and centimeters there is no effect on accuracy of cubic measurements.
For weight measurement 1 pound Avoirdupois = 7000 grains = 453.59237 grams EXACTLY so there is no effect on accuracy.
Since the metric system defines 1 milliliter as 1 cubic centimeter of water at Standard Temperature and Pressure (STP) and gives it a weight of 1 gram, there is no effect on accuracy there either.
Of course, the smaller your increments of measurement, the more precise your measurement.   But precision is not the same as accuracy.
Also, the conversion from Fahrenheit to Celcius = degrees F - 32 x 5/9 and from Celcius to Fahrenheit = degrees Celcius x 9/5 + 32 so accuracy is the same there also.

Our numbering system uses ten symbols ( 0 1 2 3 4 5 6 7 8 9 ) and therefore uses "a power of ten" when multiplying or dividing when shifting a decimal point.. The metric system also uses "a power of ten" when multiplying or dividing units of measurement. The metric system is therefore simpler and easier to understand and use because it uses the same structure as our numbering system. This is the reason that most people state when the advantages of metric are discussed but there are other reasons.to keep tracking about the ubit conversions, you can use this Unit Converter ,to get more instant results.