Electricity consumption calculator
Calculate electricity consumption and cost of appliances from power and running time.
Indicative prices as of 3. 8. 2026
Enter the power and operating time – the calculation happens instantly.
Compare supplier prices (10)
| Supplier | Cena | |
|---|---|---|
| MND | 3 950 CZK/MWh | |
| ČEZ | 3 990 CZK/MWh | |
| innogy | 4 090 CZK/MWh | |
| Pražská energetika | 4 150 CZK/MWh | |
| E.ON | 4 190 CZK/MWh | |
| Centropol | 4 250 CZK/MWh | |
| PRE | 4 290 CZK/MWh | |
| Yello | 4 350 CZK/MWh | |
| Bohemia Energy | 4 390 CZK/MWh | |
| Nano Energies | 4 450 CZK/MWh |
Indicative prices of power-only electricity, excluding distribution and fees.
How electricity consumption and cost are calculated
Electricity consumption is measured in kilowatt-hours (kWh). An appliance with a power rating of 1,000 W (1 kW) running for one hour consumes 1 kWh. You get the price by multiplying the consumption by the price per kWh – contracts often quote this per MWh (1 MWh = 1,000 kWh).
consumption (kWh) = power (kW) × time (h) • cost = consumption × price per kWh
Example: an appliance with a power rating of 2,000 W running 24 h a day consumes 48 kWh per day. At a price of 4 210 CZK/MWh (i.e. 4,21 CZK/kWh) that's roughly 202 CZK per day.
Why the price is quoted per MWh
Electricity suppliers commonly quote power-only electricity in CZK/MWh. The final price also includes distribution, taxes, and fees, so the real price per kWh tends to be higher than just the power component. For an exact calculation, enter the price from your bill.
Note: the calculation is approximate. The pre-filled price is the average market value; your actual price under your contract may differ.