Milliamp Hours to Amp Hours (mAh to Ah) Conversion Calculator

Use our calculator to easily convert milliamp hours to amp hours (mAh to Ah).

Milliamp Hours to Amp Hours Conversion Calculator

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amp hours (Ah)
Conversion formula: Ah = mAh ÷ 1000

Or would you rather convert amp hours to milliamp hours?

Milliamp Hours to Amp Hours Conversion Chart

Here is a conversion chart converting common values of milliamp hours to amp hours.

Milliamp Hours (mAh)Amp Hours (Ah)
1 mAh0.001 Ah
2 mAh0.002 Ah
3 mAh0.003 Ah
4 mAh0.004 Ah
5 mAh0.005 Ah
10 mAh0.01 Ah
20 mAh0.02 Ah
30 mAh0.03 Ah
40 mAh0.04 Ah
50 mAh0.05 Ah
100 mAh0.1 Ah
250 mAh0.25 Ah
500 mAh0.5 Ah
750 mAh0.75 Ah
1000 mAh1 Ah
1500 mAh1.5 Ah
2000 mAh2 Ah
2500 mAh2.5 Ah
3000 mAh3 Ah
3500 mAh3.5 Ah
4000 mAh4 Ah
4500 mAh4.5 Ah
5000 mAh5 Ah
6000 mAh6 Ah
7000 mAh7 Ah
8000 mAh8 Ah
9000 mAh9 Ah
10000 mAh10 Ah
15000 mAh15 Ah
20000 mAh20 Ah

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

How to Convert Milliamp Hours to Amp Hours (mAh to Ah)

To convert milliamp hours (mAh) to amp hours (Ah), you simply divide the number of milliamp hours by 1000.

Conversion formula: amp hours = milliamp hours ÷ 1000

Abbreviated formula: Ah = mAh ÷ 1000

Example

Suppose I have a rechargeable 18650 lithium-ion battery for one of my projects and it has a capacity of 2000 milliamp hours.

Here's how to convert this number to amp hours:

2000 mAh ÷ 1000 = 2 Ah

So, in this example, the battery capacity can also be expressed as 2 amp hours.

That's it!

How to Convert Amp Hours to Milliamp Hours (Ah to mAh)

Need to convert the other way?

To convert amp hours to milliamp hours, you multiply the number of amp hours by 1000.

Conversion formula: milliamp hours = amp hours × 1000

Abbreviated formula: mAh = Ah × 1000

Example

For instance, let's say you have a 10Ah portable power bank. What is its capacity in milliamp hours?

10 Ah × 1000 = 10000 mAh

So, in this example, your power bank has a capacity of 10,000 milliamp hours. (10,000 mAh is currently one of the most common power bank sizes on the market.)

What Is a Milliamp Hour?

A milliampere hour -- often shortened to milliamp hour -- is a unit of electric charge. It represents the amount of electric charge that can be transferred by a current of one milliampere in one hour.

Milliampere hour is abbreviated mAh. So, 1000 milliampere hours can be written as 1000 mAh.

Milliamp hours are a common way to express battery capacity for batteries found in portable electronics, such as phones, tablets, headphones, and battery packs.

What Is an Amp Hour?

An ampere hour -- often shortened to amp hour -- is a unit of electric charge, equal to the charge transferred by a steady current of one ampere flowing for one hour.

Ampere hour is abbreviated Ah. So, 1 ampere hour can be written as 1 Ah.

Amp hours are a common way to express battery capacity for larger batteries, such as 12V batteries.

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Alex Beale
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.