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EV & heating

Geyser Electricity Cost Calculator

Calculate from litres heated, temperature rise, heater efficiency and your electricity tariff.

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 monthly water-heating cost

₹271

Heating the entered water volume may use about 1.13 kWh per cycle.

Energy per cycle1.13 kWh
Monthly energy33.9 kWh
Annual estimate₹3,256

Keep in mind

Assumes 1 litre of water has approximately 1 kg of mass.

Standing losses, pipe losses and thermostat cycling are not separately modelled.

How this estimate works

A simple formula, visible assumptions

Thermal kWh = litres × temperature rise × 4.186 ÷ 3,600.

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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