Electricity Cost Calculator
Daily, monthly and yearly running cost of any appliance from its wattage and hours of use.
Results
Energy
6.000
kWh
Cost
1.08
Cost
32.40
Cost
394.20
The dashed line marks the value you entered.
What this tool does
Multiply the power rating by the hours it runs and you have kilowatt-hours; multiply that by your tariff and you have the cost. It is the fastest way to find out whether an old fridge or an electric heater is quietly responsible for a large part of the bill.
Formula
kWh = P × h ÷ 1000 , cost = kWh × price
Variables
| Symbol | Meaning | Unit |
|---|---|---|
p | Power | W |
h | Hours per day | h |
c | Price per kWh | — |
kd | Energy | kWh |
cd | Cost | — |
cm | Cost | — |
cy | Cost | — |
Worked example
- Power2000 W
- Hours per day3 h
- Price per kWh0.18
- Energy6.000 kWh
- Cost1.08
- Cost32.40
- Cost394.20
Limitations
- The tool works with whatever currency you use for the inputs; it does not convert between currencies.
- The result is an estimate based only on the values you type. Real situations often include factors this calculator does not know about.