Electricity cost calculator
The math runs in this tab. Nothing is uploaded.
Cost
Prices are in whatever currency you type. Fridges and air conditioners cycle on and off, so their real use is usually lower than the label.
How to use this tool
Work out what an appliance costs to run. Nothing is uploaded.
Open Electricity cost calculator
A 1000 W air conditioner for 8 hours a day, 30 days, at 0.15 per kWh is filled. The cost sits on the right.
Pick an appliance or type watts
Choose a preset or type the watts from the label. Set the hours a day, the days and how many of them run.
Enter your price
Type the price per kWh from your bill. The cost for the period, per day and per year update. Copy puts them on the clipboard.
FAQ
How is electricity cost calculated?
Watts × hours a day ÷ 1000 gives kWh a day; kWh × your price per kWh gives the cost. A 1000 W air conditioner for 8 hours uses 8 kWh; at 0.15 a kWh that is 1.20 a day.
Is anything uploaded?
No. The math runs in this tab.
Where do I find the watts?
On the label or plug of the appliance, or in its manual. Devices that cycle on and off, like fridges and air conditioners, draw full power only part of the time, so their real use is usually lower than the label.
Where do I find my price per kWh?
On your electricity bill: total energy charge divided by kWh used. Tiered or time-of-use tariffs have several prices; use the one for the hours the appliance runs.
What does standby use cost?
Enter the standby watts (often 0.5–5 W) with 24 hours a day. 5 W all year is about 44 kWh.