Ampere hour to kilowatt hour (Ah to kWh) calculator Explained

By Last updated: June 11, 2023

Ah to kWh Calculator

Ah to kWh Formula

The formula to convert an energy value from ampere-hours to kilowatt-hours is kWh = (Ah x V) / 1000.

$$\text{Energy in kWh} = \frac{\text{Energy in Ah} \times \text{Voltage}}{1,000}$$


$${kWh} = \frac{{Ah} \times {V}}{1,000}$$

Where Ah is the energy value in amp-hours, V is the voltage of the energy source, and kWh is the equivalent energy value in kilowatt-hours.

How to convert amp-hours to kilowatt-hours?

To convert energy value from amp-hours to kilowatt-hours, follow the simple steps below:

  1. Write down the energy value in amp-hours (Ah).
  2. Multiply it by the value of the energy source voltage (V).
  3. Divide the result by 1000.
  4. The result from the equation is the value of an energy value in kilowatt-hours (kWh).

Example: Find the maximum energy that can be produced by a 12V battery

What is the maximum energy can a 12V battery rated at 100Ah generates in kWh? Assuming it can use 100% of its capacity.

To find the maximum generated energy by the battery in kilowatt-hours or kWh, use the following formula and follows by entering the given values.

$\text{Energy in kWh} = \frac{\text{Energy in Ah} \times \text{Voltage}}{1,000}$
$\text{Energy in kWh} = \frac{{100\ Ah} \times {12\ V}}{1,000}$


$\text{Energy in kWh} = \frac{1,200}{1,000}\ {kWh}$
$\text{Energy in kWh} = 1.2\ {kWh}$

So, the maximum energy generated by a 12V battery with a capacity rated at 100Ah is 1.2 kWh.

Typical Ah to kWh Conversion Table

Here is the conversion table from amp-hours (Ah) to kilowatt-hours (kWh) for typical voltage sources. Use the table for a quick reference and remember it for everyday use.

12V Battery

Amp-hours (Ah)Voltage (V)Kilowatt-hours (kWh)
1 Ah12V0.012 kWh
2 Ah12V0.024 kWh
3 Ah12V0.036 kWh
4 Ah12V0.048 kWh
5 Ah12V0.060 kWh
6 Ah12V0.072 kWh
7 Ah12V0.084 kWh
8 Ah12V0.096 kWh
9 Ah12V0.108 kWh
10 Ah12V0.120 kWh
20 Ah12V0.240 kWh
30 Ah12V0.360 kWh
40 Ah12V0.480 kWh
50 Ah12V0.600 kWh
100 Ah12V1.200 kWh

24V Battery

Amp-hours (Ah)Voltage (V)Kilowatt-hours (kWh)
1 Ah24V0.024 kWh
2 Ah24V0.048 kWh
3 Ah24V0.072 kWh
4 Ah24V0.096 kWh
5 Ah24V0.120 kWh
6 Ah24V0.144 kWh
7 Ah24V0.168 kWh
8 Ah24V0.192 kWh
9 Ah24V0.216 kWh
10 Ah24V0.240 kWh
20 Ah24V0.480 kWh
30 Ah24V0.720 kWh
40 Ah24V0.960 kWh
50 Ah24V1.200 kWh
100 Ah24V2.400 kWh

48V Battery

Amp-hours (Ah)Voltage (V)Kilowatt-hours (kWh)
1 Ah48V0.048 kWh
2 Ah48V0.096 kWh
3 Ah48V0.144 kWh
4 Ah48V0.192 kWh
5 Ah48V0.240 kWh
6 Ah48V0.288 kWh
7 Ah48V0.336 kWh
8 Ah48V0.384 kWh
9 Ah48V0.432 kWh
10 Ah48V0.480 kWh
20 Ah48V0.960 kWh
30 Ah48V1.440 kWh
40 Ah48V1.920 kWh
50 Ah48V2.400 kWh
100 Ah48V4.800 kWh
Ah to kWh Calculator

Ah to kWh Calculator App

About this app

Quickly convert amp-hours (Ah) to kilowatt-hours (kWh) with our calculator app. We will also show you the conversion formula and examples.

App availability

You can use the calculator for free as a PWA web app online or install it locally on any modern operating system, including Android, iOS, Windows 11/10, and macOS.

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