Ah to Wh Calculator - Calculator Hub

Table of contents:

Ah to Wh Formula
How to convert amp-hour to watt-hour?
Typical Ah to Wh Conversion Table
FAQs

Ah to Wh Formula

The formula to convert an energy value from ampere-hours to watt-hours is Wh = Ah x V.

\text{Energy in Wh} = \frac{\text{Energy in Ah} \times \text{Voltage}}{1,000}

{Wh} = \frac{{Ah} \times {V}}{1,000}

Where Ah is the energy value in amp-hours, V is the voltage of the energy source, and Wh is the equivalent energy value in watt-hours.

How to convert amp-hour to watt-hour?

To convert energy value from amp-hours to watt-hours or Ah to Wh, follow the simple steps below:

Write down the energy value in amp-hours (Ah).
Multiply it by the value of the energy source voltage (V).
The result from the equation is the value of an energy value in watt-hours (Wh).

Example: Find the maximum energy that can be produced by a 12V battery

What is the maximum energy can a 12V battery rated at 100Ah generates in Wh? Assuming it can use 100% of its capacity.

To find the maximum generated energy by the battery in watt-hours or Wh, use the following formula and follows by entering the given values.

$\text{Energy in Wh} = \text{Energy in Ah} \times \text{Voltage}$

$\text{Energy in Wh} = {100\ Ah} \times {12\ V}$

Therefore,

$\text{Energy in Wh} = {1,200\ Wh}$

So, the maximum energy generated by a 12V battery with a capacity rated at 100Ah is 1,200 Wh.

Typical Ah to Wh Conversion Table

Here is the conversion table from amp-hours (Ah) to watt-hours (Wh) for typical voltage sources. Use the table for a quick reference and remember it for everyday use.

1.2V NiMH rechargeable battery

Ampere-hour (Ah)	Voltage (V)	Watt-hour (Wh)
0.1 Ah	1.2 V	0.12 Wh
0.5 Ah	1.2 V	0.60 Wh
1 Ah	1.2 V	1.20 Wh
2 Ah	1.2 V	2.40 Wh
3 Ah	1.2 V	3.60 Wh
4 Ah	1.2 V	4.80 Wh
5 Ah	1.2 V	6.00 Wh
6 Ah	1.2 V	7.20 Wh
7 Ah	1.2 V	8.40 Wh
8 Ah	1.2 V	9.60 Wh
9 Ah	1.2 V	10.80 Wh
10 Ah	1.2 V	12.00 Wh

1.5V Alkaline battery

Ampere-hour (Ah)	Voltage (V)	Watt-hour (Wh)
0.1 Ah	1.5 V	0.15 Wh
0.5 Ah	1.5 V	0.75 Wh
1 Ah	1.5 V	1.50 Wh
2 Ah	1.5 V	3.00 Wh
3 Ah	1.5 V	4.50 Wh
4 Ah	1.5 V	6.00 Wh
5 Ah	1.5 V	7.50 Wh
6 Ah	1.5 V	9.00 Wh
7 Ah	1.5 V	10.50 Wh
8 Ah	1.5 V	12.00 Wh
9 Ah	1.5 V	13.50 Wh
10 Ah	1.5 V	15.00 Wh

3.6V 18650 rechargeable battery

Ampere-hour (Ah)	Voltage (V)	Watt-hour (Wh)
0.1 Ah	3.6 V	0.36 Wh
0.5 Ah	3.6 V	1.80 Wh
1 Ah	3.6 V	3.60 Wh
2 Ah	3.6 V	7.20 Wh
3 Ah	3.6 V	10.80 Wh
4 Ah	3.6 V	14.40 Wh
5 Ah	3.6 V	18.00 Wh
6 Ah	3.6 V	21.60 Wh
7 Ah	3.6 V	25.20 Wh
8 Ah	3.6 V	28.80 Wh
9 Ah	3.6 V	32.40 Wh
10 Ah	3.6 V	36.00 Wh