Milliamp-Hours (mAh) to Watt-Hours (Wh) Conversion Calculator
Convert milliamp-hours to watt-hours by entering mAh and voltage below.
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How to Convert Milliamp-Hours to Watt-Hours
Milliamp-hours, abbreviated mAh or mA·h, are a measure of electric charge. They are most often used to measure the electrical charge of a battery.
Watt-hours, expressed as Wh or W·h, are a measure of electrical energy. Wh are usually used to measure the energy consumption of a circuit or appliance.
The conversion from electric charge to energy requires the voltage and can be done using the formula below.
mAh to Wh Conversion Formula
Wh = (mAh × V) ÷ 1,000
Thus, the energy in watt-hours is equal to the charge in milliamp-hours times the voltage, then divided by 1,000.
For example, convert the charge used by the average C battery, which is 8,000 mAh at 1.5 V, to Wh.
Wh = (8,000 mAh × 1.5 V) ÷ 1,000
Wh = 12,000 ÷ 1,000
Wh = 12 Wh
Common Battery Charge to Energy Conversions
|Battery Size||Capacity (mAh)||Energy (Wh)||Voltage|
|AA||2,700 mAh||4.05 Wh||1.5 V|
|AAA||1,200 mAh||1.8 Wh||1.5 V|
|AAAA||625 mAh||0.9375 Wh||1.5 V|
|C||8,000 mAh||12 Wh||1.5 V|
|D||12,000 mAh||18 Wh||1.5 V|
|9V||565 mAh||5.085 Wh||9 V|
Try converting amp-hours to kilowatt-hours.