Electricity cost calculator

Estimate what an appliance costs to run from watts, hours, and your rate.

Enter the rate in your own currency — 1 kWh is 1,000 W used for one hour.

Calculated in this browser. Nothing is sent anywhere.

Treats the watt figure as a constant draw — cycling appliances (fridges, air conditioners) differ from nameplate watts. Tiered rates, taxes, and fixed charges are not modeled.

How to use

  1. Enter the appliance wattage and daily hours.
  2. Enter days and your rate per kWh.
  3. Read the energy used and the estimated cost.

What it supports

Treats watts as a constant draw — cycling appliances differ from nameplate values. Tiered rates, taxes, and fixed charges are not modeled.

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