Battery - Ah to Wh Conversion

Convert battery Amp-hour to Watt-hour capacity for marine DC systems at specific voltage levels - emergency lighting 24 V, main services 110 V, DP 220 V.

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

E_{Wh} = C_{Ah} \cdot V

Symbol	Meaning	Unit
$C_{Ah}$	Rated Ah capacity	Ah
$V$	Nominal voltage	V

Source: IEEE 450 / IEEE 1188

In short

Convert battery Amp-hour to Watt-hour capacity for marine DC systems at specific voltage levels - emergency lighting 24 V, main services 110 V, DP 220 V.

Learn the theory Marine Electrical Generation and Distribution