Charge Converter
Convert between coulombs, millicoulombs, microcoulombs, nanocoulombs, picocoulombs, ampere-hours, and more instantly.
About Charge Converter
Our Charge Converter is a versatile tool that allows you to convert electric charge measurements between different units seamlessly. Whether you're working on electronics projects, physics calculations, battery capacity analysis, or scientific research, this tool provides accurate conversions across ten commonly used charge units.
The tool supports conversions between Coulombs (C), Millicoulombs (mC), Microcoulombs (μC), Nanocoulombs (nC), Picocoulombs (pC), Ampere-hours (Ah), Milliampere-hours (mAh), Elementary Charges (e), Abcoulombs (abC), and Statcoulombs (statC). All conversions are calculated with high precision and displayed instantly as you type or change units.
Convert From
How to Use
Enter the Charge Value
Type the numerical value of the electric charge you want to convert in the "Charge Value" field. You can enter whole numbers, decimals, or negative values. The input accepts any valid number.
Select the Original Unit
Choose the unit of your input value from the "From Unit" dropdown. Options include Coulombs (C), Millicoulombs (mC), Microcoulombs (μC), Ampere-hours (Ah), and more.
Select the Target Unit
Choose the unit you want to convert to from the "To Unit" dropdown. You can also use the "Swap Units" button to quickly switch between the source and target units.
View Results
Click "Convert" to see the result. The tool will display the converted value, the formula used, and all possible conversions from your original value to every supported unit.
Common Conversions
Quick links to frequently used charge conversions. Click any link to see the instant result.
Frequently Asked Questions
What are the different charge units?
Coulombs (C): The SI unit of electric charge, defined as the charge transported by a constant current of one ampere in one second. Millicoulombs (mC): One thousandth of a coulomb (1 mC = 0.001 C). Microcoulombs (μC): One millionth of a coulomb (1 μC = 10⁻⁶ C). Nanocoulombs (nC): One billionth of a coulomb (1 nC = 10⁻⁹ C). Picocoulombs (pC): One trillionth of a coulomb (1 pC = 10⁻¹² C). Ampere-hours (Ah): Commonly used for battery capacity, 1 Ah = 3600 C. Milliampere-hours (mAh): One thousandth of an ampere-hour, widely used for small battery ratings. Elementary Charges (e): The charge of a single proton (or the magnitude of an electron's charge), approximately 1.602 × 10⁻¹⁹ C.
How precise are the conversions?
Our converter uses high-precision mathematical calculations and displays results with up to 10 decimal places. For most practical applications, 2-4 decimal places are sufficient. You can round the result as needed for your specific use case.
How do I convert between coulombs and ampere-hours?
To convert from coulombs to ampere-hours: Ah = C / 3600. To convert from ampere-hours to coulombs: C = Ah × 3600. This is because 1 ampere-hour equals the charge transferred by 1 ampere of current flowing for 1 hour (3600 seconds).
What is the elementary charge?
The elementary charge (e) is the fundamental unit of electric charge in physics, equal to approximately 1.602 × 10⁻¹⁹ coulombs. It represents the magnitude of charge carried by a single proton (positive) or electron (negative). To convert coulombs to elementary charges, divide by 1.602 × 10⁻¹⁹.
What is the difference between mAh and Ah?
Both are units of electric charge commonly used to rate battery capacity. 1 Ah (ampere-hour) equals 1000 mAh (milliampere-hours). mAh is typically used for smaller batteries like those in smartphones (2000-5000 mAh), while Ah is used for larger batteries like car batteries (40-100 Ah).
Is this tool free to use?
Absolutely! Our Charge Converter is completely free to use, with no registration required. We believe in providing high-quality, accessible tools for students, engineers, physicists, and anyone who needs to perform charge conversions quickly and accurately.