Standby-power cost calculator

Reveal the annual cost of routers, televisions, consoles, chargers, smart devices, and other always-on loads.

Live calculation

Run your scenario.

Small loads become meaningful when they persist across nearly 8,760 hours each year. Add the wattage of devices that are genuinely always on.

Your reading

Planning estimate · based on your inputs

Estimated monthly cost$1.05

Likely planning range $0.94–$1.15

Per day$0.03

Per active hour$0.00

Per year$12.58

Energy / month5.8 kWh

FormulakW × runtime × tariff

Month52 weeks ÷ 12

Data qualitySelf-entered estimate

Transparent method

Annual standby kWh = watts ÷ 1,000 × 24 × 365

Small loads become meaningful when they persist across nearly 8,760 hours each year. Add the wattage of devices that are genuinely always on.

Sensitivity check

One deviceMeasure a single suspect appliance.

Media cabinetAdd television, console, receiver, and speakers.

Whole-home base loadUse an overnight meter reading with care.

Use the result well

Do not disconnect security, medical, network, or temperature-control equipment blindly.
Smart plugs also consume a small amount.
Some devices wake periodically and need multi-day measurement.