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Calculation Machine

Electricity Cost Calculator

What any appliance costs to run per day, month and year.

Reviewed by the Calculation Machine team · How we check our maths

Your values

ⓘ Live results

Results
Cost per day
$0.96
Cost per month
$29.22
Cost per year
$350.4
Energy per year
2190 kWh
Cost per hour of use
$0.24

Quick answer

Running cost is watts ÷ 1000 × hours × price per kWh.

The formula

Cost = (W ÷ 1000) × hours × rate

Worked example

Worked example

Using the values the calculator loads with.

Inputs

  • Appliance wattage1500 W
  • Hours used per day4 hrs
  • Electricity rate0.16 $/kWh

Result

  • Cost per day$0.96
  • Cost per month$29.22
  • Cost per year$350.4
  • Energy per year2190 kWh
  • Cost per hour of use$0.24

How to use the Electricity Cost Calculator

  1. 1Find the wattage on the appliance label.
  2. 2Estimate daily hours of use.
  3. 3Enter your electricity rate per kWh.

Frequently asked questions

What uses the most electricity at home?

Heating and cooling, then water heating, then the dryer and oven. Standby electronics are a small but constant drain.

How do I find my kWh rate?

It is printed on your utility bill — divide total charges by kWh used for the true all-in rate.

About this calculator