Charge Converter
Enter a charge value and unit to see the equivalent value in every supported charge unit instantly.
Enter a finite value from −1e15 to 1e15.
Converted
A QUICK WALKTHROUGH
How to use this tool
- Enter a finite charge value from −1e15 to 1e15.
- Choose coulombs (C), amp-hours (Ah), or milliamp-hours (mAh).
- Read the converted values, shown to up to 12 significant digits.
Fixed relationship
The converter uses 1 Ah = 3,600 C exactly for this calculation. One mAh is 0.001 Ah.
Input and precision
Finite numeric values from −1e15 to 1e15 are accepted. Results use JavaScript number arithmetic and are formatted to up to 12 significant digits, so very large or tiny values can be rounded.
Local calculation
Conversion happens entirely in your browser; no value is uploaded.
GOOD TO KNOW
Common questions
Which units are supported?
Coulomb (C), amp-hour (Ah), and milliamp-hour (mAh).
How is charge related to current?
Charge in coulombs equals current in amps multiplied by time in seconds; one amp-hour is one amp for one hour.
Is my data uploaded?
No. The calculation runs locally in your browser.