Milliamp Hours to Milliwatt Hours (mAh to mWh) Conversion Calculator

Use our calculator to easily convert milliamp hours to milliwatt hours (mAh to mWh).

Milliamp Hours to Milliwatt Hours Conversion Calculator

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milliwatt hours
Conversion formula: mWh = mAh × V

Or would you rather convert milliwatt hours to milliamp hours?

Milliamp Hours to Milliwatt Hours Conversion Table

Here is a conversion table converting common values of milliamp hours to milliwatt hours at 3.7V and 5V.

Milliamp Hours (mAh)Milliwatt Hours (mWh) @ 3.7VMilliwatt Hours (mWh) @ 5V
1000 mAh3700 mWh5000 mWh
2000 mAh7400 mWh10000 mWh
3000 mAh11100 mWh15000 mWh
4000 mAh14800 mWh20000 mWh
5000 mAh18500 mWh25000 mWh
6000 mAh22200 mWh30000 mWh
7000 mAh25900 mWh35000 mWh
8000 mAh29600 mWh40000 mWh
9000 mAh33300 mWh45000 mWh
10000 mAh37000 mWh50000 mWh
20000 mAh74000 mWh100000 mWh
30000 mAh111000 mWh150000 mWh
40000 mAh148000 mWh200000 mWh
50000 mAh185000 mWh250000 mWh

Note: Don't see the values you're looking for in this table? Use our mAh to mWh calculator at the top of this page to calculate them for your specific scenario.

How to Convert Milliamp Hours to Milliwatt Hours (mAh to mWh)

To convert milliamp hours to milliwatt hours, multiply milliamp hours by volts.

Conversion formula: milliwatt hours = milliamp hours × volts

Abbreviated formula: mWh = mAh × V

Example

Imagine your wireless earbuds have a battery capacity of 200mAh and a voltage of 3.7V.

To calculate the earbuds' battery capacity in milliwatt hours, you would multiply its milliamp hours by its voltage:

200 mAh × 3.7 V = 740 mWh

So, your wireless earbuds have a battery capacity of 740 milliwatt hours.

Why Convert Milliamp Hours to Milliwatt Hours?

Converting milliamp hours to milliwatt hours can help you accurately compare the energy storage capacity of batteries with different voltages. This is because the energy a battery can deliver depends on both its milliamp hours and voltage.

For example, let's take two batteries:

  1. Battery 1: 1,000mAh at 3.7V
  2. Battery 2: 1,000mAh at 7.4V

At first glance, if you just consider milliamp hours, you might think these two batteries can supply the same amount of energy. However, once you convert their milliamp hours to milliwatt hours, you'll find that Battery 2 can supply twice as much energy as Battery 1.

Battery 1: 1000mAh × 3.7V = 3700mWh

Battery 2: 1000mAh × 7.4V = 7400mWh

Another reason to convert milliamp hours to milliwatt hours is when you want to know how long a battery will last when powering a certain device. Let's say you have a device that uses 500 milliwatts of power and you want to power it with Battery 1. You can calculate how long Battery 1 will last by dividing its milliwatt hours by the device's power consumption in milliwatts.

3,700mWh ÷ 500mW = 7.4 hours

So you can expect Battery 1 to power your device for about 7.4 hours before needing a recharge. This calculation wouldn't have been possible without converting milliamp hours to milliwatt hours.

How to Convert Milliwatt Hours to Milliamp Hours (mWh to mAh)

To convert milliwatt hours to milliamp hours, divide milliwatt hours by volts.

Conversion formula: milliamp hours = milliwatt hours ÷ volts

Abbreviated formula: mAh = mWh ÷ V

Example

Let's say you have a 3.2V battery with a 500 mWh capacity.

To calculate your battery's milliamp hours, you would divide its milliwatt hours by its voltage:

500 mWh ÷ 3.2 V = 156.25 mAh

In this example, your battery has a capacity of 156.25 milliamp hours.

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Alex Beale
Alex Beale is the founder and owner of Footprint Hero. As a self-taught DIY solar enthusiast, Alex has spent 4 years producing educational solar content across YouTube, TikTok, Instagram, and the Footprint Hero blog. During that time, he's built Footprint Hero to over 7 million blog visits and 18 million YouTube views. He lives in Tennessee.