Amp-Hours to Watt-Hours Calculator
It is essential to convert Amp Hours (Ah) to Watt Hours (Wh) to understand how much energy a battery can deliver.
For comparing battery capacities, estimating device runtimes, and optimizing energy usage in applications like solar panels, RV setups, and power banks.
While Amp Hours measure the charge capacity, Watt Hours reflect the actual energy output by factoring in voltage.
Our Amp Hours to Watt Hours Calculator simplifies this process, providing quick, accurate results with just a few inputs.
What Are Amp Hours (Ah) and Watt Hours (Wh)?
Amp Hours show how much electricity a battery can hold for a certain amount of time.
Think of it as the size of a fuel tank — the higher the Ah, the longer the battery can provide power.
For example, a 10 Ah battery can deliver 10 amps of current for 1 hour or 5 amps for 2 hours.
This is often used for car batteries, solar setups, or even power banks.
Watt Hours represent the total amount of energy a battery can provide, considering capacity (Ah) and voltage.
It’s like knowing how big the fuel tank is and how far that fuel can take you.
Amp-Hours (Ah) to Watt Hours(Wh) Formula
For instance, a 12V battery with 10 Ah has:
Use the formula below to convert Amp-Hours (Ah) to Watt Hours (Wh):
Voltage (V): This is the “push” or pressure that drives the current through a circuit. A 12V battery delivers more energy per unit of charge than a 6V battery.
Example Calculation:
Watt Hours (Wh) = Ah × Voltage (V)
Substituting the values:
Watt Hours (Wh) = 10 Ah × 12 V = 120 Wh
This means the battery can deliver 120 watts of power for 1 hour.
FAQ
What is the difference between Ah and Wh?
Amp Hours (Ah) measure the battery’s capacity or how much charge it can hold. Watt Hours (Wh) measures the total energy provided, factoring in both capacity (Ah) and voltage (V). In simple terms, Wh = Ah × V.
Can you convert Ah to Wh without voltage?
No, it would help if you had the voltage (V) to convert Ah to Wh. The formula is Wh = Ah × V. Without knowing the voltage, the total energy output cannot be determined.
How does temperature affect battery capacity and energy?
Extreme temperatures (hot or cold) can reduce battery capacity and efficiency. Cold temperatures slow down chemical reactions, lowering capacity, while high temperatures can cause faster wear and energy loss. Continuously operate batteries within their recommended temperature range for optimal performance.
Why is voltage important in the Ah to Wh conversion?
Voltage is crucial because it determines how much energy is transferred per unit of charge. While Amp Hours (Ah) measure the battery’s capacity, the voltage adds the “push” that drives the current. Without voltage, you can’t calculate the total energy in Watt Hours (Wh).
For example:
– A 10 Ah battery at 12V delivers 120 Wh (10 × 12).
The same 10 Ah battery at 6V only delivers 60 Wh (10 × 6).
