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Electricity cost per kWh calculator

Calculate electricity costs based on kWh usage and price per kilowatt-hour.

Energy
Inputs

Calculate now

Enter electricity usage and price per kWh to estimate costs.

W
You can often find the rated power on the label or data sheet.
hrs
Enter how many hours the device runs on a typical usage day.
Use 7 for daily use or often 5 for workday-based usage.
€/kWh
Use your current variable tariff price per kWh.
€
Optional fixed tariff component per month.
Guidance

Electricity cost per kWh calculator:

Use the result as a scenario comparison, not only as a single number. For energy calculators, runtime, price assumptions, efficiency and seasonal effects usually drive the biggest differences.

How to use the result better

  • Calculate one realistic and one efficient scenario.
  • Compare monthly and annual values so small daily amounts are not underestimated.
  • Check inputs against real tariff, consumption or device data.

Common mistake

The most common mistake is an overly optimistic usage profile: runtimes too short, prices too low or missing base costs.

How exact is the result?

It is a solid estimate when inputs are realistic. Bills may differ because of tariff details, weather, usage and supplier factors.

Why calculate several scenarios?

Scenarios show which input has the strongest impact, and that is usually where optimization should start.

Continue calculating

More useful electricity costs calculators

Go back to the main calculator or continue with a related variant.

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Next steps

Useful calculators to continue

After the result, related calculators help you understand costs, alternatives and next steps more clearly.

Understand costs

Put consumption, prices and running costs into context.

Find savings potential

Compare alternatives and identify useful next steps.

More clarity

Use related energy calculators instead of isolated single values.

Related calculators

Appliance electricity cost calculatorCalculate electricity cost per hour, day, month and year. Useful for appliances, heaters, refrigerators, home office, power-hungry devices and tariff checks.Open calculator →Electricity Cost CalculatorCalculate electricity cost per hour, day, month and year. Useful for appliances, heaters, refrigerators, home office, power-hungry devices and tariff checks.Open calculator →Photovoltaic CalculatorCalculate annual solar yield, self-consumption, feed-in, annual savings and rough payback period for your PV system online.Open calculator →Heat Pump CalculatorCalculate heat pump electricity consumption, annual heating cost, monthly cost, fixed cost share and effective heat cost per kWh online.Open calculator →

How to use the result well

  • Compare several scenarios: Change the key values and check how much the result changes.

  • Use related calculators: Decisions often become clearer when you also calculate costs, timeframes or alternatives.

More Energy calculators

Find additional tools that fit this calculation topic.

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Formula

How the result is calculated

Daily electricity consumption in kWh = (power in watts ÷ 1000) × usage hours per day
Weekly electricity consumption = daily consumption × usage days per week
Yearly electricity consumption = weekly consumption × 52
Monthly electricity consumption = yearly consumption ÷ 12
Variable electricity cost = electricity consumption × electricity price
Total monthly cost = variable monthly electricity cost + monthly base fee
Total yearly cost = variable yearly cost + monthly base fee × 12

Example

Worked example

Example: A device with 1,500 watts runs 2 hours per day on 7 days per week. This results in daily consumption of 3 kWh, weekly consumption of 21 kWh and annual consumption of about 1,092 kWh. At an electricity price of €0.32 per kWh, variable electricity cost is about €349.44 per year. With an additional monthly base fee of €12, total annual cost is about €493.44.

When is this calculator useful?

Use it to compare tariffs, consumption scenarios or specific time periods.

FAQ

Frequently asked questions

What does electricity cost per kWh mean?

It is the price of one kilowatt-hour of electricity.