mAh to Wh Converter — Free Online Calculator
Convert milliamp-hours (mAh) to watt-hours (Wh) for battery capacity comparison. Works for phone, laptop, and power bank batteries.
How to Use This Calculator
Enter battery capacity in mAh and select the voltage.
The Formula Explained
Wh = mAh × V / 1000. This is the actual energy stored in the battery. Airlines limit batteries to 100 Wh (carry-on) or 160 Wh (with approval).