Estimate total energy of connected devices.
A connected household's electricity use is a count problem, not a wattage problem. Each device draws its active power for some hours and its standby power for the remaining ones, and multiplying by the number of devices is what turns individually negligible figures into a visible line on a bill. The standby share is the finding that usually surprises people: because standby runs for eighteen or more hours a day, a device drawing 1.4 W idle can account for a fifth of its own annual consumption while doing nothing at all.
Total energy of connected devices
kWh/day = ((active W x active h) + (standby W x (24 - active h))) x devices / 1000; annual cost = kWh/day x 365 x rate
Typically twelve to twenty-five in a family household once phones, tablets, laptops, televisions, streaming boxes, speakers, routers, printers and smart plugs are counted. Counting them is usually the step that makes the total believable.
The share figure answers it for your own numbers. Modern regulations cap most standby draw at around 0.5 W, so the meaningful offenders are older equipment, set-top boxes and anything with a display or always-on network radio.
It is on continuously, so enter it as active for 24 hours in its own calculation rather than folding it into the average. Averaging an always-on device with intermittently used ones understates the total.