Watts to mAh

Power (W)

Voltage (V)

Enter the values above

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Example of Watts to mAh Calculations

To convert watts (W) to milliampere-hours (mAh), you need to know the voltage (V) of the battery. The formula to convert watts to mAh is:

mAh = Watts×1000/Volts

Assuming a common voltage of 3.7V, which is typical for lithium-ion batteries.

Below is a table showing the conversion of various watt values to mAh, sorted from smallest to largest, assuming a voltage of 3.7V.

Watts (W)	Voltage (V)	mAh	Watts (W)	Voltage (V)	mAh
5.00	3.70	1351.35	10.00	3.70	2702.70
15.00	3.70	4054.05	20.00	3.70	5405.41
22.50	3.70	6080.41	30.00	3.70	8108.11
40.00	3.70	10810.81	65.00	3.70	17567.57
100.00	3.70	27027.03	150.00	3.70	40540.54
160.00	3.70	43243.24	200.00	3.70	54054.05
300.00	3.70	81081.08	500.00	3.70	135135.14
600.00	3.70	162162.16	1000.00	3.70	270270.27

To convert 10 watts to mAh at 3.7V:

mAh=10×1000/3.7≈2702.70 mAh

To convert 20 watts to mAh at 3.7V:

mAh=20×1000/3.7≈5405.41 mAh

To convert 100 watts to mAh at 3.7V:

mAh=100×1000/3.7≈27027.03 mAh