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Mihsaba›Engineering›Appliance Energy Use Calculator

Appliance Energy Use Calculator

Calculate appliance energy use in kWh from power, operating hours and days.

Starting values are an editable worked example.

Choose an example to fill the fields and calculate. Check the measurement units and reporting period.

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How to use

  1. Enter Appliance power W.
  2. Enter Hours per day.
  3. Enter Days.
  4. Calculate, then review power, price and period before comparing.

How it is calculated

kWh = watts ÷ 1000 × hours/day × days

Example

A 1,500 W appliance running 4 hours a day uses 6 kWh daily and 180 kWh over 30 days.

Important notes

Nameplate power can be a maximum rather than average draw. Thermostatic or variable-speed appliances need a realistic average.

Worked examples and interpreting results

Worked examples and interpreting results
CaseCalculationResult
Daily1500 ÷ 1000 × 46
30 days6 × 30180

Frequently asked questions

Are watts the same as kWh?

No. Watts measure power; kWh measures energy from power multiplied by time.

Is the result an actual utility bill?

No. It is a calculation from your usage, price and inputs; real tariffs, taxes and fixed fees may add other items.

How can I improve accuracy?

Use measured or device-specific power and usage plus the actual electricity price for the same period.