Electric Charge Converter
Our free electrical & magnetic converter handles electric charge conversions. See tables, ratios, and examples for quick reference.
Reviewed by Manoj Kumar, Mathematics Educator
Formula
Converted Value = Input Value x (From Unit Factor / To Unit Factor)
Electric charge conversion works by first converting the input value to the base unit (coulombs) using the source unit factor, then dividing by the target unit factor to get the result. All electromagnetic charge units relate to the coulomb through fixed conversion factors based on physical constants and unit system definitions.
Worked Examples
Example 1: Battery Charge Capacity
Problem:A smartphone battery is rated at 4000 mAh. How many coulombs of charge does it store?
Solution:Charge (C) = mAh x 3.6\nCharge = 4000 x 3.6\nCharge = 14,400 coulombs\nThis means the battery can deliver 14,400 coulombs before depleting.
Result:4000 mAh = 14,400 C
Example 2: Electron Count from Charge
Problem:A capacitor holds 5 microcoulombs of charge. How many elementary charges is that?
Solution:Number of e = Charge / elementary charge\n= 5 x 10^-6 C / 1.602176634 x 10^-19 C\n= 3.122 x 10^13 elementary charges\nOver 31 trillion electrons are stored on the capacitor plate.
Result:5 uC = 3.122 x 10^13 elementary charges
Frequently Asked Questions
What is an elementary charge?
The elementary charge (e) is the magnitude of the electric charge carried by a single proton or electron. Its exact value is 1.602176634 x 10^-19 coulombs, as defined by the 2019 SI redefinition. It is one of the fundamental physical constants of nature. All observable electric charges are integer multiples of this elementary charge, a principle known as charge quantization.
References
Reviewed by Manoj Kumar, Mathematics Educator · Editorial policy