See power consumption on the laptop?

Is there a tool / program where I can see how high my power consumption is and also says how much I cost

So on the power supply is the maximum tdp on it and the price should be a maximum of 10ct / hour. You do not have to worry about that.

I'm not concerned that it costs me something I'm just interested in just such a thing

A current normal laptop has an estimated power consumption of 20-30 euro per year under normal use (4-6 hours / day). Can you google?

So, if it's not a gaming laptop, do not panic

Also on the Internet afterwards or shoot a meter. Good is synonymous Hhomework monitor. He shows you everything.

So it's about the power consumption of an entire apartment / house? And not about the power consumption of the laptop?

The main hurdle should then be to "tap" the meter in a suitable manner. Depending on the meter type, different interface modules are possible. Have also seen where unnerved colleagues had built their own counter in addition, because the installed by the network operator, official counter his consumption could not elicit via an electronic interface.

Look at z. B. Times at ELV.de at

https://www.elv.de/homematic-zaehlersensor-led-es-led.html
(click here to get an image from the sensor for LED pulses)

In the end, it is then "only" about the signal of the respective interface module or sub-counter z. B. Via radio and display on the PC. You should also find something in ELV. Otherwise, the PV installers also offer such systems. Have to google for "energy managers".