Watt-hours to Amp-hours Converter
Convert energy capacity in watt-hours (Wh) to battery charge capacity in amp-hours (Ah). You must know the nominal voltage of the battery system.
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Watt-hour ↔ Ampere-hour
Wh
Ah
Calculation Formula
100 Wh ÷ 12 V = 8.333 Ah
Worked Example
Convert 2,400 Wh to Ah at 24V:
2,400 Wh ÷ 24 V = 100 Ah
Watt-hour to Ampere-hour Table
| Wh | Ah (12V) | Ah (24V) | Ah (48V) |
|---|---|---|---|
| 500 Wh | 41.667 Ah | 20.833 Ah | 10.417 Ah |
| 1,000 Wh | 83.333 Ah | 41.667 Ah | 20.833 Ah |
| 1,200 Wh | 100 Ah | 50 Ah | 25 Ah |
| 2,400 Wh | 200 Ah | 100 Ah | 50 Ah |
| 3,600 Wh | 300 Ah | 150 Ah | 75 Ah |
| 4,800 Wh | 400 Ah | 200 Ah | 100 Ah |
| 10,000 Wh | 833.33 Ah | 416.67 Ah | 208.33 Ah |
Understanding the Conversion
This conversion is useful for determining what size battery (in Ah) you need for a given energy requirement (in Wh) at a specific system voltage.
Size your backup power system.
Use these converted ratings to determine exactly what size generator or battery bank you need.