Milliamp Hours to Amps (mAh to A) Conversion Calculator

Use our calculator to easily convert milliamp hours to amps (mAh to A).

Milliamp Hours to Amps Conversion Calculator

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amps
Conversion formula: A = mAh ÷ hrs ÷ 1000

Or would you rather convert amps to milliamp hours?

Milliamp Hours to Amps Conversion Table

Here is a conversion table converting common values of milliamp hours to amps, over a duration of 1 hour and 1 day.

Milliamp Hours (mAh)Amps (A) @ 1 hourAmps (A) @ 1 day
1000 mAh1 A0.042 A
2000 mAh2 A0.083 A
3000 mAh3 A0.125 A
4000 mAh4 A0.167 A
5000 mAh5 A0.208 A
6000 mAh6 A0.25 A
7000 mAh7 A0.292 A
8000 mAh8 A0.333 A
9000 mAh9 A0.375 A
10,000 mAh10 A0.417 A
11,000 mAh11 A0.458 A
12,000 mAh12 A0.5 A
13,000 mAh13 A0.542 A
14,000 mAh14 A0.583 A
15,000 mAh15 A0.625 A
16,000 mAh16 A0.667 A
17,000 mAh17 A0.708 A
18,000 mAh18 A0.75 A
19,000 mAh19 A0.792 A
20,000 mAh20 A0.833 A

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

How to Convert Milliamp Hours to Amps (mAh to A)

To convert milliamp hours to amps, divide the milliamp hours by the number of hours, and then divide by 1000 to convert from milliamps to amps.

Conversion formula: amps = milliamp hours ÷ hours ÷ 1000

Abbreviated formula: A = mAh ÷ hrs ÷ 1000

Example

Let's say you have a 2000 mAh battery and it gets depleted in 8 hours.

To convert milliamp hours to amps, you would do the following:

2000 mAh ÷ 8 hrs ÷ 1000 = 0.25 A

So, your battery is discharging at a rate of 0.25 amps.

Why Convert Milliamp Hours to Amps?

Converting milliamp hours to amps is useful in a couple of different scenarios. It's particularly important when it comes to estimating a small battery's charging and discharging current.

For example, let's say you have a 5000 mAh power bank that you want to charge in 2 hours. How much current does your charger need to output to charge it at that rate?

5000 mAh ÷ 2 hrs ÷ 1000 = 2.5 A

It turns out you'd need to buy a charger capable of outputting 2.5 amps in order to charge your power bank that quickly.

A power bank's charging speed is also limited by its charging ports, so you'd want to confirm that its charging ports can handle that much current before investing the money in a fast charger. If your power bank has both USB-A and USB-C charging ports, then you'd probably end up using the USB-C port since USB-C can charge faster than basic USB.

Converting mAh to amps can also be helpful when you're trying to determine how many amps a device uses. Let's say you have a light that you can run for 8 hours on a 1000 mAh lithium-ion battery. How many amps does the light use?

1000 mAh ÷ 8 hrs ÷ 1000 = 0.125 A

Your light uses around 0.125 amps on average. That's helpful to know if you want to resize your battery or use it to power more devices later on.

Note: These are simplified examples. Batteries lose capacity as they age (and may not even output their rated capacity to begin with). Also, depending on what type of battery you have, it may not have 100% usable capacity.

How to Convert Amps to Milliamp Hours (A to mAh)

Need to convert the other way?

To calculate milliamp hours from amps and hours, you multiply the number of amps by the number of hours and then multiply the result by 1000.

Conversion formula: milliamp hours = amps × hours × 1000

Abbreviated formula: mAh = A × hrs × 1000

Example

Let's say you have a device that draws 2 amps and you run it for 3 hours.

Here's how you'd calculate the milliamp hours consumed during that period.

2 A × 3 hrs × 1000 = 6000 mAh

So, your device used 6000 milliamp hours of energy.

How to Convert Milliamp Hours to Milliamps (mAh to mA)

To convert milliamp hours to milliamps, divide milliamp hours by the number of hours. (You don't need to multiply or divide by 1000 here.)

Conversion formula: milliamps = milliamp hours ÷ hours

Abbreviated formula: mA = mAh ÷ hrs

Example

Let's say you have a 10,000 mAh battery pack and it powers your portable speaker for 10 hours before needing to be recharged. Here's how to calculate how much current your speaker is using, on average:

10,000 mAh ÷ 10 hrs = 1000 mA

On average, your portable speaker is using 1000 milliamps of current. So if you wanted to run it for 20 hours, you could upgrade to a 20,000 mAh battery pack.

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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.