Convert Kilowatt Hours to Amp Hours (kWh to Ah)

Use our interactive calculator to easily convert kilowatt hours to amp hours (kWh to Ah).

Kilowatt Hours to Amp Hours Conversion Calculator

Error: Enter a valid number of kilowatt hours (kWh).
Error: Enter a valid voltage (V).
amp hours (Ah)
Conversion formula: Ah = kWh ÷ V × 1000

Or would you instead like to convert amp hours to kilowatt hours?

Kilowatt Hours to Amp Hours Conversion Chart

Here is a conversion chart converting common kilowatt hour values to amp hours at 12V and 24V.

Kilowatt HoursAmp Hours @ 12VAmp Hours @ 24V
1 kWh83.33 Ah41.67 Ah
2 kWh166.67 Ah83.33 Ah
3 kWh250 Ah125 Ah
4 kWh333.33 Ah166.67 Ah
5 kWh416.67 Ah208.33 Ah
6 kWh500 Ah250 Ah
7 kWh583.33 Ah291.67 Ah
8 kWh666.67 Ah333.33 Ah
9 kWh750 Ah375 Ah
10 kWh833.33 Ah416.67 Ah

Note: Don't see the values you're looking for in this chart? Use our kilowatt hours to amp hours conversion calculator at the top of this page to calculate them for your specific scenario.

How to Convert Kilowatt Hours to Amp Hours (kWh to Ah)

To convert kilowatt hours to amp hours, divide kilowatt hours by volts, then multiply by 1,000.

Conversion formula: amp hours = kilowatt hours ÷ volts × 1000

Abbreviated: Ah = kWh ÷ V × 1000

Example: How to Calculate Amp Hours of a Battery

Let's say you own a solar generator with a battery capacity of 2.16 kilowatt hours. You look through the product manual and find that the battery voltage is 43.2 volts.

Knowing these two numbers, you can now calculate your generator's battery capacity in amp hours. Here's how to do it:

2.16 kWh ÷ 43.2 V × 1000 = 50 Ah

So, in this example, your generator's battery has a capacity of 50 amp hours.

Pretty easy!

Why Convert Kilowatt Hours to Amp Hours?

Battery charge and discharge rates are based on their capacity in amp hours. For example, the rates in amps for most lead acid batteries are 30% of amp hour capacity. So this 33Ah lead acid battery I own has recommended "initial current" of less than 9.90 amps. 9.90 is 30% of 33.

Batteries have recommended max charge and discharge rates based on their capacity in amp hours. For instance, most lithium iron phosphate batteries have recommended max charge rates in amps equal to 50% of their capacity in amp hours.

So a 100Ah LiFePO4 battery will likely have a recommended max charge rate of 50 amps. Knowing this, we can design a solar power or electrical system so that we don't exceed this limit.

Another scenario in which converting kilowatt hours to amp hours is useful is when sizing a battery bank for off-grid solar power systems.

Home energy consumption is reported in kilowatt hours, so -- when considering going off-grid -- you can look at how many kilowatt hours you use on average each day and week. These figures can be used as a starting point in figuring out how big your battery bank needs to be.

How to Convert Amp Hours to Kilowatt Hours (Ah to kWh)

Need to convert the other way?

To convert amp hours to kilowatt hours, multiply amp hours times volts, then divide by 1,000.

Conversion formula: kilowatt hours = amp hours × volts ÷ 1000

Abbreviated: kWh = Ah × V ÷ 1000

Example: Calculating Kilowatt Hours of a Battery

Most batteries don't list their capacity in kilowatt hours. Rather, they list them in amp hours, and you have to calculate their capacity in kilowatt hours yourself.

For example, let's say you have a 24V 200Ah LiFePO4 battery. Here's how to calculate its kilowatt hours:

200 Ah × 24 V ÷ 1000 = 4.8 kWh

So, in this example, your battery has a capacity of 4.8 kilowatt hours.

How to Convert Kilowatt Hours to Watts (kWh to W)

To convert kilowatt hours to watts, divide kilowatts hours by hours, then multiply by 1,000.

Conversion formula: watts = kilowatt hours ÷ hours × 1000

Abbreviated: W = kWh ÷ hrs × 1000

Example

Let's say you look at your power bill and see that your house used on average 36 kilowatt hours per day during the previous month.

You can use this information to estimate how many watts, on average, your house was using.

Here's how to do it:

36 kWh ÷ 24 hrs × 1000 = 1500 W

So, in this example, during the previous month your house was consuming on average 1500 watts.

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Alex Beale
Alex Beale
Hi, I'm Alex. I started Footprint Hero to help people reduce their environmental impact. My current obsession is DIY solar power projects, which I've been building since 2020.
Alex Beale

Alex Beale

Hi, I'm Alex. I started Footprint Hero to help people reduce their environmental impact. My current obsession is DIY solar power projects, which I've been building since 2020.

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