Amp Hours to Amps (Ah to A) Conversion Calculator

Use our calculator to easily convert amp hours to amps (Ah to A).

Amp Hours to Amps Conversion Calculator

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amps
Conversion formula: A = Ah ÷ hrs

Or would you rather convert amps to amp hours?

Amp Hours to Amps Conversion Table

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

Amp Hours (Ah)Amps (A) @ 1 hourAmps (A) @ 1 day
1 Ah1 A0.042 A
2 Ah2 A0.083 A
3 Ah3 A0.125 A
4 Ah4 A0.167 A
5 Ah5 A0.208 A
6 Ah6 A0.25 A
7 Ah7 A0.292 A
8 Ah8 A0.333 A
9 Ah9 A0.375 A
10 Ah10 A0.417 A
20 Ah20 A0.833 A
30 Ah30 A1.25 A
40 Ah40 A1.667 A
50 Ah50 A2.083 A
60 Ah60 A2.5 A
70 Ah70 A2.917 A
80 Ah80 A3.333 A
90 Ah90 A3.75 A
100 Ah100 A4.167 A
110 Ah110 A4.583 A
120 Ah120 A5 A

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

How to Convert Amp Hours to Amps (Ah to A)

To convert amp hours to amps, divide amp hours by hours. (If your time is in minutes or days, you'll need to first convert it to hours.)

Conversion formula: amps = amp hours ÷ hours

Abbreviated formula: A = Ah ÷ hrs

Example

Let's say you have a 50Ah battery and you want to know how many amps it can provide over a 10 hour period.

You would calculate the amps by dividing the amp hours by the hours:

50 Ah ÷ 10 hrs = 5 A

So, your battery can provide 5 amps of current for 10 hours.

Why Convert Amp Hours to Amps?

If I want my 100Ah battery to run a device, such as this inverter, for around 5 hours, then the inverter should draw around 20 amps from the battery on average.

If you know how long you want a device to run and how many amp hours a battery has, you can calculate the maximum current draw in amps that the device should have.

Let's say you have a 100Ah LiFePO4 battery, and you want it to be able to power a device for 5 hours. To calculate the maximum current draw, you divide the battery's amp hours by the desired runtime in hours.

100 Ah ÷ 5 hrs = 20 A

So, if you want the battery to last for 5 hours, the device should draw around 20 amps on average.

Charging a 12V LiFePO4 battery with a lithium battery charger

Alternatively, you can convert amp hours to amps to estimate how much current you need to charge a battery at your desired rate.

For instance, let's say you have a 12V 50Ah LiFePO4 battery and you want to buy a 12V battery charger that can charge it in as little as 2 hours. How many amps should the charger be able to output?

50 Ah ÷ 2 hrs = 25 A

You need to buy a 12V battery charger capable of outputting up to 25 amps in order to meet your desired charge time.

Note: In reality, a battery's charge time depends on a number of factors such as battery type, depth of discharge, and the charger's charging algorithm. You can use our battery charge time calculator to get a more accurate estimate. Also, when using a battery, always try not to exceed the battery's max charging and discharging rates.

How to Convert Amps to Amp Hours (A to Ah)

Need to convert the other way?

Amp hours are calculated by multiplying the number of amps by the number of hours.

Conversion formula: amp hours = amps × hours

Abbreviated formula: Ah = A × hrs

Example

Let's say you have a small portable AC that draws 10 amps of current, and you use it for 3 hours per day. Here's how to calculate how many amp hours it consumes each day:

10 A × 3 hrs = 30 Ah

It uses 30 amp hours of electricity per day.

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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.