# How many watt hours is a amp hour?

Answered by Jarrod Smith

The conversion between watt-hours and amp-hours can be a bit tricky, but I will do my best to explain it in a detailed manner.

To understand the relationship between these two units, it is important to first understand what watt-hours and amp-hours represent. Watt-hours (Wh) measure the amount of energy consumed or generated over a period of time, while amp-hours (Ah) measure the capacity of a battery or the amount of charge that can be delivered by an electrical system.

Let’s start with watt-hours. As I mentioned earlier, 1 watt-hour is equivalent to 1 watt of power expended for 1 hour. This means that if you have a device that consumes 1 watt of power and you use it for 1 hour, you would have consumed 1 watt-hour of energy.

Now, let’s move on to amp-hours. 1 amp-hour is defined as 1 amp of current expended for 1 hour. This means that if you have a battery with a capacity of 1 amp-hour, it can deliver 1 amp of current for 1 hour.

To convert between watt-hours and amp-hours, we need to consider the voltage of the system or device in question. This is because power (watt) is equal to voltage (volts) multiplied by current (amps). So, if we know the voltage, we can use this equation to convert between the two units.

For example, let’s say we have a battery with a capacity of 10 amp-hours and a voltage of 12 volts. To convert this to watt-hours, we would multiply the capacity (10 Ah) by the voltage (12 V). In this case, the battery would have a total energy capacity of 120 watt-hours (10 Ah * 12 V = 120 Wh).

On the other hand, if we have a device that consumes 50 watts of power and is powered by a 5-volt power source, we can calculate the runtime in amp-hours. To do this, we divide the watt-hours (50 Wh) by the voltage (5 V). In this case, the device would be able to run for 10 amp-hours (50 Wh / 5 V = 10 Ah).

It is important to note that these conversions are based on ideal conditions and do not take into account factors such as inefficiencies or losses in the system. In real-world scenarios, the actual energy or charge delivered may be slightly different.

To summarize, the conversion between watt-hours and amp-hours depends on the voltage of the system or device. By multiplying the amp-hour capacity by the voltage, we can obtain the energy capacity in watt-hours. Conversely, by dividing the watt-hours by the voltage, we can calculate the runtime in amp-hours.