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Electricity • Costs • Consumption

Oblicz koszty energii

Oblicz electricity consumption and costs from power, runtime and unit price.

Wartości obliczeń

Uwaga: Ten kalkulator podaje jedynie techniczne oszacowanie. W instalacjach elektrycznych należy dodatkowo sprawdzić normy, środki ochrony, sposób ułożenia, temperaturę otoczenia, grupowanie, zabezpieczenia i dane producenta.

Zastosowany wzór

kWh = (Watts ÷ 1000) × Hours × Days

Costs = kWh × Price per kWh

The calculator converts watts to kilowatts and uses that to calculate the energy consumption in kWh.

Najczęściej zadawane pytania

Are base fees included?

No. The calculator only considers the unit price per kWh, not monthly base fees.

What does kWh mean?

kWh stands for kilowatt-hour and describes energy consumption over a given time.

How accurate is the calculator?

The calculation is mathematically precise, provided power, runtime and electricity price are entered correctly.

Practical guidance

Oszacuj energy cost from a realistic usage profile

Rated power, operating time and energy price produce a transparent estimate only if the device actually draws that power for the stated time.

Input values explained

Moc w watach
Use the electrical active power drawn by the load. A nameplate, data sheet or power meter is more reliable than an estimate.
Operating time
Enter the actual operating time in the period considered. Thermostatically controlled or cycling devices rarely run continuously at rated power.
Number of days
This value extrapolates an identical daily usage pattern. Seasonal and weekday differences are not included automatically.
Energy price
Use your tariff's energy charge in cents per kWh. Standing charges, metering fees and future price changes are excluded.

Example: 1,000 W for five hours a day

A device runs for five hours on 30 days at a constant 1,000 W, with energy priced at €0.35/kWh.

1 kW × 5 h × 30 = 150 kWh; 150 × €0.35 = €52.50

Oszacujd energy cost is €52.50. The tariff's standing charge is not caused by this single appliance.

Why actual cost can differ

Heating, refrigeration and machinery often cycle. A meter reading over a representative period is better than rated power times time.

Calculation limits

  • Standing charges, tariff tiers and future price changes are excluded.
  • Standby, partial load and seasonal operating hours must be reflected in the inputs.