My Unifi U6 APs draws 4.2W from the PoE switch as of writing this (light traffic, but 5-10 IoT devices connected). I'd guess add 10% PSU inefficiency and 10% margin for error, and you're looking at 5W.
A full router obviously draws more, but it depends on your internet connection: Our old DOCSIS3 router (AVM Fritzbox, full router mode+wifi) ran quite hot and is known to have thermal issues. The new place has some shitty DSL (32MBit/s effective speed), and the router I use (older Telekom Speedport in PPoE modem mode) barely gets warm. Didn't measure, but I suppose something like 15-20W vs 5W.
I can only echo the other recommendations: Get a kill-a-watt/powermeter/energiekostenmessgerät. BUT be careful, they are often not very accurate in the low ranges, and don't confuse apparent power and effective power (I know I usually do). You also want one that can show the total energy consumed over a given time frame, e.g. for your fridge or freezer or dryer.
You can also use smart sockets, since some of these have a powermeter as well (same caveats regarding low consumption apply; also these draw another 0.75W). Just make sure to configure fridge/freezer sockets to be always-on to avoid nasty surprises. That's what I'm doing. Since I'm not a fan of cloud-based solutions mine run Tasmota and feed the data into Home Assistant.
Oh, and: Especially if you have an older dryer (non-heat-pump), measure that or outright get a new one. Our heat-pump dryer payed for itself after 3-4 years (comparing advertised consumption pre-buying and the old dryers measured consumption; even if it takes 5-8 years imho it's still worth it). And it can be controlled via WiFi, so theoretically we can sync it with our (planned) photovoltaic installation.
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My Unifi U6 APs draws 4.2W from the PoE switch as of writing this (light traffic, but 5-10 IoT devices connected). I'd guess add 10% PSU inefficiency and 10% margin for error, and you're looking at 5W.
A full router obviously draws more, but it depends on your internet connection: Our old DOCSIS3 router (AVM Fritzbox, full router mode+wifi) ran quite hot and is known to have thermal issues. The new place has some shitty DSL (32MBit/s effective speed), and the router I use (older Telekom Speedport in PPoE modem mode) barely gets warm. Didn't measure, but I suppose something like 15-20W vs 5W.
I can only echo the other recommendations: Get a kill-a-watt/powermeter/energiekostenmessgerät. BUT be careful, they are often not very accurate in the low ranges, and don't confuse apparent power and effective power (I know I usually do). You also want one that can show the total energy consumed over a given time frame, e.g. for your fridge or freezer or dryer.
You can also use smart sockets, since some of these have a powermeter as well (same caveats regarding low consumption apply; also these draw another 0.75W). Just make sure to configure fridge/freezer sockets to be always-on to avoid nasty surprises. That's what I'm doing. Since I'm not a fan of cloud-based solutions mine run Tasmota and feed the data into Home Assistant.
Oh, and: Especially if you have an older dryer (non-heat-pump), measure that or outright get a new one. Our heat-pump dryer payed for itself after 3-4 years (comparing advertised consumption pre-buying and the old dryers measured consumption; even if it takes 5-8 years imho it's still worth it). And it can be controlled via WiFi, so theoretically we can sync it with our (planned) photovoltaic installation.