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Electricity

Appliance Standby Power Cost Calculator

Add the measured or labelled standby wattage of always-connected devices, then enter your tariff and time period.

Formula shown Browser-only inputs Offline ready
Your inputs

Enter your household details

Your numbers stay in this browser. Nothing is uploaded.
Your estimate

Estimated standby power cost

₹144

25 W left on standby may use about 18 kWh over 30 days.

Energy for period18 kWh
Average daily cost₹4.80
Annualised cost₹1,752

Keep in mind

The entered total standby wattage is assumed constant for 24 hours per day.

Use measured standby power where possible; devices that fully switch off should not be included.

How this estimate works

A simple formula, visible assumptions

Energy (kWh) = total standby watts × 24 hours × days ÷ 1,000; cost = energy × tariff.

The result updates in your browser as you change an input. It is a planning estimate, so compare it with real bills, product specifications and a qualified professional's assessment.

Read the full methodology
A better input gives a better result

Before you calculate

  • Use a recent electricity bill or equipment nameplate.
  • Enter prices and tariffs that apply to your household.
  • Keep notes from installers or manufacturers nearby.
  • Recalculate when your usage pattern changes.
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