Measure over time
Standby draw can fluctuate. A plug meter left in place for several days is more useful than a single instant reading.
Prioritize clusters
Entertainment centers, home offices, and older network equipment can contain several always-on devices. Measure the group before buying controls.
Do not switch critical devices
Routers, medical equipment, security systems, sump controls, and devices needing updates or safe shutdowns may need continuous power.
Use the numbers
Apply this guide with one of WattMeasure’s free calculators. Results are planning estimates and should be verified for consequential decisions.
Last reviewed August 6, 2026