Phantom Load Calculator

Enter the number of always-plugged-in devices and their average standby wattage to see the hidden annual cost.

⏱ ~10 sec🔌 Standby power🔒 No signup

Result

$35.75/yr
Annual phantom load cost
Total standby draw24 W
% of typical home's bill~2-3%

TVs, game consoles, cable boxes, chargers, and microwaves with clock displays are the most common phantom load culprits, typically 1-10W each even when 'off'.

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How much phantom load really adds up

Annual cost = (Total standby watts ÷ 1000) × 8,760 hours × Rate

Standby power runs 24/7/365, unlike active appliance use, so even small wattages compound into meaningful annual cost since the device is drawing power every single hour of the year. Studies commonly estimate phantom load makes up 5-10% of a typical home's electricity bill — smart power strips or unplugging rarely-used electronics are the standard fix.

Frequently asked questions

Which devices draw the most phantom power?

Game consoles left in 'instant on' mode, cable/satellite boxes, and older TVs and desktop computers are typically the biggest offenders, sometimes drawing 10-30W even when appearing off.

Do smart power strips actually help?

Yes — they cut power to peripheral devices when a main device (like a TV) is off, effectively eliminating standby draw for the whole group without manually unplugging anything.

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