5V 2.5A Power Supply Wattage Calculation Formula and Example

Hello, I have such a problem because I have a 5v to 2.5A power supply, what is its power, means how much current it consumes and what is the formula so that you can easily count such things in advance, thank you

Hello, It's very simple = UxI, and you don't know the rest, this is a pattern of power.

Hello !


P = U x I = 5 x 2.5 = 12.5 W.

I have a problem because I don't know if you went to school and they usually say something about Ohm's law ...
Power is the product of voltage and current, so 5V times 2.5A is 12.5W (watts).
If it is a power supply that takes electricity from the lighting network (230V), the current consumption is 12.5W divided by 230V, which gives 54 mA (milliamperes). Since the efficiency (efficiency, i.e. the ratio of the given power to the power consumed) for such a power supply is approx. 50%, it means that the current consumption will in fact be twice as high (approx. 100mA).

I walked but I had to forget thanks