Electricity Cost Calculator (Watts to kWh to Cost)
Enter device power, usage and price per kWh to see consumption and cost.
Total cost$810.00
Energy (kWh)270
How it is calculated
kWh = watts ÷ 1000 × hours × days; cost = kWh × price.
Worked example
| Total cost | $810.00 |
| Energy (kWh) | 270 |
FAQ
Where is the power rating?
On the device label or in the manual.
Are the results exact?
Results are estimates for information only; check official sources for binding figures.