Kilowatt hour to Amp hour (kWh to Ah) calculator Explained

By Last updated: June 09, 2023

kWh to Ah Calculator

kWh to Ah Formula

The formula to convert an energy value from kilowatt-hours to ampere-hours is Ah = (kWh x 1,000) / V.

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


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

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

How to convert kilowatt-hours to amp-hours?

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

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

Example: Find the energy capacity of a 12V battery

What is the energy capacity of a 12V battery that can produce 0.7 kWh of electric energy? Assuming it can use 100% of its capacity.

To find the energy capacity of the battery in amp-hours or Ah, use the following formula and follows by entering the given values.

$\text{Energy in Ah} = \frac{\text{Energy in kWh} \times {1,000}}{\text{Voltage}}$
$\text{Energy in Ah} = \frac{{0.7\ kWh} \times {1,000}}{12\ V}$


$\text{Energy in Ah} = \frac{700\ kWh}{12\ V}$
$\text{Energy in Ah} = {58.33 Ah}$

So the energy capacity of the 12V battery is 58.33 Ah.

Typical kWh to Ah Conversion Table

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

12V Battery

Kilowatt-hours (kWh)Voltage (V)Amp-hours (Ah)
0.1 kWh12V8.33 Ah
0.5 kWh12V41.67 Ah
1 kWh12V83.33 Ah
2 kWh12V166.67 Ah
3 kWh12V250.00 Ah
4 kWh12V333.33 Ah
5 kWh12V416.67 Ah
6 kWh12V500.00 Ah
7 kWh12V583.33 Ah
8 kWh12V666.67 Ah
9 kWh12V750.00 Ah
10 kWh12V833.33 Ah

24V Battery

Kilowatt-hours (kWh)Voltage (V)Amp-hours (Ah)
0.1 kWh24V4.17 Ah
0.5 kWh24V20.83 Ah
1 kWh24V41.67 Ah
2 kWh24V83.33 Ah
3 kWh24V125.00 Ah
4 kWh24V166.67 Ah
5 kWh24V208.33 Ah
6 kWh24V250.00 Ah
7 kWh24V291.67 Ah
8 kWh24V333.33 Ah
9 kWh24V375.00 Ah
10 kWh24V416.67 Ah

48V Battery

Kilowatt-hours (kWh)Voltage (V)Amp-hours (Ah)
0.1 kWh48V2.08 Ah
0.5 kWh48V10.42 Ah
1 kWh48V20.83 Ah
2 kWh48V41.67 Ah
3 kWh48V62.50 Ah
4 kWh48V83.33 Ah
5 kWh48V104.17 Ah
6 kWh48V125.00 Ah
7 kWh48V145.83 Ah
8 kWh48V166.67 Ah
9 kWh48V187.50 Ah
10 kWh48V208.33 Ah
kWh to Ah Calculator

kWh to Ah Calculator App

About this app

Quickly convert kilowatt-hours to amp-hours 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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