12V Battery Amp-Hours to Watt-Hours Conversion Chart

Battery Capacity (Ah)	Total Theoretical Energy (V x Ah)	SLI Usable Wh (20% Max Cutoff)	AGM Usable Wh (50% Cutoff)	LiFePO4 Usable Wh (80% Cutoff)
6 Ah	72 Wh	14.4 Wh	36 Wh	57.6 Wh
7 Ah	84 Wh	16.8 Wh	42 Wh	67.2 Wh
9 Ah	108 Wh	21.6 Wh	54 Wh	86.4 Wh
12 Ah	144 Wh	28.8 Wh	72 Wh	115.2 Wh
18 Ah	216 Wh	43.2 Wh	108 Wh	172.8 Wh
20 Ah	240 Wh	48 Wh	120 Wh	192 Wh
22 Ah	264 Wh	52.8 Wh	132 Wh	211.2 Wh
35 Ah	420 Wh	84 Wh	210 Wh	336 Wh
50 Ah	600 Wh	120 Wh	300 Wh	480 Wh
100 Ah	1,200 Wh	240 Wh	600 Wh	960 Wh
200 Ah	2,400 Wh	480 Wh	1,200 Wh	1,920 Wh

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