A coulomb is a measure of electrical charge, equivalent to the charge accumulated in one second by a current of one amp. Coulombs are related to the electron because electricity is the movement of electrons and other charged particles. As electrons move from one atom to the next, they create a flow, and that flow is called electricity. Converting coulombs to electrons is a straightforward process using a scientifically agreed conversion factor.
Things You'll Need
 Scientific calculator

Enter the number of coulombs into the calculator. Check the calculator display to ensure that the value is correct.

Multiply the coulomb value by 6.25 x 10^18, where 10^18 means 10 to the power of 18, and is equivalent to the number of electrons in one coulomb.
For example, 12 coulombs is equal to 75,000,000,000,000,000,000 electrons  12 x 6.25 x 10^18 = 75,000,000,000,000,000,000.

Convert the result into scientific notation; a decimal value to the power of 10. Count the number of places that the decimal point shifts to the left of the result to produce a value consisting of a unit and a decimal fraction. Using the example in Step 2, the point is moved 19 places to the left to reduce 75,000,000,000,000,000,000 to 7.5, so the value is 7.5 x 10^19.
References
 University of North Carolina at Chapel Hill; A Dictionary of Units of Measurement; Russ Rowlett
 Energy Quest: Energy Story: Chapter 2  What Is Electricity
 San Diego State University Physics Department ; Chapter 28  Circuits; John Ferguson
 Texas A and M University, Department of Chemistry: Math Skills Review Scientific Notation
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