Use our battery amp-hour (Ah) to watts calculator to find out the battery capacity in watt-hours.
battery Ah to watts calculator
How to use this calculator?
- Enter the capacity of your battery in amp-hours (Ah).
- Enter the voltage of your battery (12,24,48v).
- Click on the "CALCULATE" button to get the result.
Video - Explained Volts, Amps, & Watts
How to calculate watts in a battery?
Watts is the unit that represents the total number of power. So to calculate watts from Ah use this formula.
Watts = Amps*volts Multiplying the value of amps with volts will give you the number of watts.
For Example
Let's suppose you have a 12v 300Ah battery.
12v * 300Ah = 3600 watts 12v 300Ah battery is equal to 3600 watts or 3.6kW.
How many watts is a 12-volt battery - Chart
Here's a chart with the conversion of different size 12v batteries in watts.
| 12V Battery Size (Ah) | Equal to Watts (W) |
|---|---|
| 7Ah | 84 watts |
| 12Ah | 144 watts |
| 33Ah | 396 watts |
| 50Ah | 600 watts |
| 60Ah | 720 watts |
| 70Ah | 840 watts |
| 100Ah | 1200 watts |
| 110Ah | 1320 watts |
| 120Ah | 1440 watts |
| 150Ah | 1800 watts |
| 160Ah | 1920 watts |
| 170Ah | 2040 watts |
| 200Ah | 2400 watts |
| 220Ah | 2640 watts |
| 250Ah | 3000 watts |
| 300Ah | 3600 watts |
| 400Ah | 4800 watts |
Summary
- 12v 7Ah battery is equal to 84 watts.
- 12v 12Ah battery is equal to 144 watts.
- 12v 100Ah battery is equal to 1200 watts or 1.2kW.
- 12v 200Ah battery is equal to 2400 watts or 2.4kW.
Why calculate watts in a 12v battery?
Battery capacities are rated as Amp-hours (Ah). But most of our appliances are rated as watts.
So calculating Ah to watts will give you an idea of the total capacity of your battery in watts so you can determine how long will your battery last on running any appliances.
And also what appliances running your battery will fall in the safe zone because of battery c-ratings (Charge and discharge rate of battery).
To better understand this, read the article Maximum Charging Current & Voltage For 12v Battery.
And also converting your 12v battery in watts will give you an idea of how many watts it can store so you can pick the right size solar panel in order to recharge your battery.
Related post: How Long To Charge 12v Battery With Solar panel
How many watts is a 12V car battery
Usually, 12v car batteries have a capacity of 60Ah so let's assume that you have a 12v 60Ah car battery. 12 × 60 = 720 watts. So a 12v car battery is equal to 720 watts.
You can calculate the value by yourself with the formula which I have mentioned above or by using a calculator.
How many watt-hours in a car battery 12v 100Ah car battery has 1200 watt-hours (Wh).
How many watts are in 12 volts
To calculate how many watts are 12 volts, you would need the value of amps, and multiplying the amps by 12 will give you watts (Watts = Amps × 12).
For example 12v 33Ah how many watts? 12 × 33 = 396 watts.
How many watts are in a 12-volt deep cycle battery
12V 150Ah deep cycle battery has 1800 watts or 1.8kW (watts = Amps × volts).
