This Ah to kWh converter turns a battery’s amp-hour capacity into kilowatt-hours of energy using its voltage. Enter the amp-hours and voltage above for an instant result.
Formula
kWh = (Ah × Voltage) ÷ 1000
Example
100 Ah at 12 V: kWh = (100 × 12) ÷ 1000 = 1.2 kWh.
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Frequently Asked Questions
How do I convert Ah to kWh?
Multiply amp-hours by the battery voltage, then divide by 1000. A 100 Ah 12 V battery holds 1.2 kWh.
Why do I need voltage to convert Ah to kWh?
Amp-hours measure charge, not energy. Multiplying by voltage converts charge into watt-hours of energy.
How much usable energy does a battery give?
Somewhat less than the rated kWh, because depth-of-discharge limits and efficiency reduce the usable portion.