Being engaged in the design of electrical systems, it is necessary to competently operate with such quantities as Amps, Watts and Volts. In addition, you need to be able to correctly calculate their ratio during the load on a particular mechanism. Yes, of course, there are systems in which the voltage is fixed, for example, a home network. However, we must not forget that the power and power of the current are still different concepts, so you need to know exactly how many watts contains 1 Ampere.
Content
 1 Is there a difference between Volts and Watts?
 2 What is Ampere?
 3 How many volts contains 1 amp?
 4 What are VoltAmps and how can I convert them to Watts?
 5 How many watts in 1 ampere?
Is there a difference between Volts and Watts?
To begin, let's remember what these concepts mean. And also try to find out if there is a significant difference between them.
So, the electrical voltage that produces a current whose power is 1 Ampere is called a Volt. It should be noted that it “works” in a conductor with a resistance of 1 Ohm.
Volt can be divided:
 1,000,000 microvolts
 1,000 millivolts
At the same time, we can say that the watt is the constant power of the electric current. At a voltage of 1 Volt, its power is 1 Ampere.
Based on the foregoing, we can safely say that there is still a difference between these concepts. Therefore, when working with different electrical systems, it must be taken into account.
What is Ampere?
Next, let's try to deal with this concept. First of all, it is worth noting that Ampere (A) is the current strength considered to be constant. However, its distinguishing feature is that, after interacting with a solution of acidnitric silver, it deposits every second 0.00111800 g of silver.
There is a generally accepted division, according to which 1 A contains:
 1,000,000 microamps
 1,000 milliamps
How many volts contains 1 amp?
To answer this question is quite difficult. However, in order to make it easier for you to deal with this issue, we suggest that you familiarize yourself with the relationship tables:
For DC:

W: A = A x Ohmy = √ (W x Ohmy) 
Amps  (W: V) = √ (W: Ohms) = V: Ohms 
Omy  B: A = W: (A)^{2} = (B)^{2}W 
Watts  A x B = (A)^{2} x Ohms = (V)^{2}: Oms 
For AC:
Volts  W: (A x cos Ψ) = A x Ohmy x cos Ψ = √ (W x Ohmy) 
Amps  W: (W x cos Ψ) = 1 / cos Ψ x √ (W: Ohms) = B: (Ohms x cos) 
Omy  B: (A x cos Ψ) = W: (A)^{2} • cos^{2} Ψ = (B)^{2}W 
Watts  B x A x cos Ψ = (A)^{2} x Ohmy cos^{2} Ψ = (B)^{2}: Oms 
What are VoltAmps and how can I convert them to Watts?
Another unit of power measurement adopted in SI is the VoltAmpere (VA). It is equal to the product of such valid values as current and voltage.
Additionally, it is worth noting that, as a rule, VAs are used exclusively in order to estimate the power in ac connections. That is, in cases where the watt and voltampere different value.
Currently, there are many different online calculators that allow you to quickly and easily convert VA to watts. This procedure is so simple that we will not stop our attention on it.
But, especially for those people who do not have on hand an online calculator to convert VoltAmperes to Watts, we consider the translation process of these values in more detail:
 Energy is produced or consumed with a certain power. A Watt is one of the units of power measurement.
 To measure the magnitude of the electric current using A, which is equal to 1 Coulomb.
 Electromotive force or voltage is measured in Volts.
 In order to remember how these values relate to each other, you need to learn the following formula: Amps = Watts / Volts
With this formula we can find out the strength of the current. Of course, only if we already known voltage and power.
That is, it turns out that in order to convert Watts to Amps, we need to figure out the voltage in the system. For example, in the US, the voltage in the electrical network is 120V, and in Russia  220V.
It is worth noting that the batteries or batteries used in carsusually have a voltage equal to 12 V. And the voltage in small batteries used for various portable devices, as a rule, does not exceed 1.5 V.
Thus, we can say that knowing the voltage and power, we can easily find out also the strength of the current. For this we need only the right use the above formula.
Let's look at how this “works” on a specific example: if the voltage is 220V and the power is 220W, then the current will be 220/220 or 1 A.
How many watts in 1 ampere?
Now let's try to translate Watts to Amperes. And for this we need another formula:
I = p / u
In it, I is A, P is Watt, and U is Volt.
Making a simple calculation using this formula, we can find out how many watts are in one A.
As we said earlier, there is another way to calculate how many watts per 1 A. In order to use it you will need open online calculator and enter the power consumption, as well as voltage.
Next, you just need to click on the button labeled "calculate" and within a couple of seconds a special program will give you the correct value. Using this method, you will undoubtedly be able to save your time and effort, since you will not have to calculate all the indicators yourself using formulas.