A computer in sleep mode typically uses very little power, often only a fraction of what it uses when running normally.
While the exact power consumption will vary depending on the specific computer model and its components, most computers in sleep mode use less than 5 watts, compared to 65-250 watts when actively running. This means that a computer in sleep mode can save a significant amount of energy and reduce your electricity bill.
It's important to note that some components, like certain hard drives and network cards, may still draw a small amount of power even in sleep mode. However, the overall power consumption is significantly lower than when the computer is running.
If you're concerned about saving energy, putting your computer to sleep when you're not using it is a great way to reduce your electricity consumption.