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Electricity Bill Calculator

Monthly electricity cost from appliance load.

Estimate the monthly electricity cost of an appliance from its wattage, daily use, and your tariff.

Daniel Oh By Daniel Oh
Published Last reviewed 1 min read

Inputs

W
hr
$

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Monthly kWh = watts × hours × 30 / 1000. Cost = kWh × tariff.

In depth

Estimate the monthly electricity cost of an appliance from its wattage, daily use, and your tariff.