Try It Yourself: Amp to Watt-Hour Calculator:
Just enter your amp hours and voltage, and instantly get your watt hours.
Amp Hours to Watt Hours Calculator
Enter your battery’s Amp hours and voltage to instantly calculate its energy in Watt hours (Wh).
If you’ve ever looked at a battery label and wondered how Amp Hours (Ah) relate to Watt Hours (Wh), you’re not alone. This simple conversion is critical for solar panel users, RV owners, and anyone working with off-grid battery systems.
What Are Amp Hours and Watt Hours?
- Amp Hours (Ah): This measures the battery’s capacity — how much current it can supply over time.
- Volts (V): The electrical pressure that pushes current through a circuit.
- Watt Hours (Wh): The actual energy stored or consumed, calculated by multiplying volts by amp hours.
Why the Conversion Matters
Understanding this conversion helps you:
- Size your battery storage correctly
- Match solar panels with inverters and batteries
- Estimate how long appliances can run
For example, if you have a 12V battery rated at 100Ah × 12V = 1200Wh
This means the battery can deliver 1200 watt-hours, or 1.2 kilowatt-hours (kWh) of energy.
FAQs
Q: Is this conversion valid for AC appliances too?
Only if you’re working with battery-backed inverters that convert DC to AC. Always match voltage and type.
Q: Do all 12V batteries deliver the same watt-hours?
No. Watt-hours depend on amp-hour rating, not just voltage. A 12V 200Ah battery has twice the energy of a 12V 100Ah battery.
