Standby Power Cost Calculator – Nature Observer

Standby power (watts)

Typical: 1–10 W per device (varies a lot).

Hours per day in standby

If it’s always plugged in, use 24 hours.

Number of devices

Example: TV + console + speakers + router, etc.

Electricity price (per kWh)

Enter your tariff price per kWh (e.g., 0.30).

Currency symbol

Only affects display.

Grid emissions (kg CO₂ per kWh)

Optional: adds an estimated CO₂ impact.

Precision

Rounding for costs and kWh.

Output style

Detailed shows the full kWh math.