๐ Household
Electricity Cost Calculator
Electricity cost is watts times hours divided by a thousand, multiplied by your tariff. The surprise is always standby power: devices left plugged in can account for a noticeable slice of a household bill without ever being switched on.
How it works
Power rating
Hours used per day
Days used per month
Electricity price
How many of these
Standby power when off
Energy per day
Cost per day
Cost per month
Cost per year
Energy per year
Standby cost per year
Cost per hour
Frequently asked questions
How do I use the Electricity Cost Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.