Ah to kWh Calculator
Convert amp-hours (Ah) to kilowatt-hours (kWh) for battery capacity calculations. Essential for solar, RV, and EV battery system design.
Ah
V
ENERGY
1.2 kWh
IN Wh
1,200 Wh
FORMULA
kWh = Ah Γ V / 1000
Ah to kWh β Battery Table
| Ah | 12V | 24V | 36V | 48V |
|---|---|---|---|---|
| 10 Ah | 0.12 kWh | 0.24 kWh | 0.36 kWh | 0.48 kWh |
| 20 Ah | 0.24 kWh | 0.48 kWh | 0.72 kWh | 0.96 kWh |
| 50 Ah | 0.6 kWh | 1.2 kWh | 1.8 kWh | 2.4 kWh |
| 100 Ah | 1.2 kWh | 2.4 kWh | 3.6 kWh | 4.8 kWh |
| 150 Ah | 1.8 kWh | 3.6 kWh | 5.4 kWh | 7.2 kWh |
| 200 Ah | 2.4 kWh | 4.8 kWh | 7.2 kWh | 9.6 kWh |
| 300 Ah | 3.6 kWh | 7.2 kWh | 10.8 kWh | 14.4 kWh |
| 400 Ah | 4.8 kWh | 9.6 kWh | 14.4 kWh | 19.2 kWh |
| 500 Ah | 6 kWh | 12 kWh | 18 kWh | 24 kWh |
π‘ How to Convert Ah to kWh
Amp-hours (Ah) measure how much current a battery can deliver over time. To find the energy stored, multiply by voltage.
Formula
kWh = (Ah Γ V) / 1,000
Example: 100 Ah battery at 12V β kWh = (100 Γ 12) / 1,000 = 1.2 kWh
Example: 100 Ah battery at 12V β kWh = (100 Γ 12) / 1,000 = 1.2 kWh
Common Battery Systems
| System | Voltage | Typical Ah | kWh |
|---|---|---|---|
| Car battery | 12V | 60 Ah | 0.72 kWh |
| RV battery bank | 12V | 200 Ah | 2.4 kWh |
| Tesla Powerwall | 48V | 280 Ah | 13.5 kWh |
| EV battery (typical) | 400V | 150 Ah | 60 kWh |
100 Ah Γ 12V = 1.2 kWh. A Tesla Powerwall at ~280 Ah Γ 48V = 13.5 kWh.