Electricity calculator: what does it cost to run?
Calculate the cost, compare common appliances, and get one practical saving idea — instantly.
Estimated monthly cost
$32.40A small change based on your numbers
Your energy coach
High-power appliances respond best to shorter use, timers, and efficient temperature settings.
Use it one hour less each day
$98.55Possible saving per yearTry a common appliance
One tap. Real numbers.
Life in Numbers · Quick answers
10 popular calculators
Ready-made examples for home, cars, energy and housing. Open a question and the first estimate is already there.
Whole-home energy check
Where does your home's electricity go?
Build a quick appliance list. Life in Numbers totals the bill and shows the biggest energy users.
Compare before you plug in
Compare before you plug in
Two appliances can do a similar job at very different monthly costs.
Space heater costs less
Optional partner services
Useful services — only if you need them
No pop-ups and no promises of easy money. Life in Numbers's calculators remain free.
Partner links: Life in Numbers may receive a reward if you use them. Your price does not increase.Everyday tools
Crypto services · 18+
Crypto can lose value. Check availability and rules in your country. This is advertising, not financial advice.
Creator network
Soundtracks for focus, rest & imagination
Explore our independent YouTube channels. Listening and subscribing is a free way to support the project.
Find the wattage
Check the label, manual, or power adapter.
Add your usage
Estimate the hours used on a typical day.
Use your tariff
Enter the price per kWh from your bill.
Popular appliance guides
48 guides foundHow appliance electricity cost is calculated
Power in kilowatts × hours used × electricity price gives the running cost. Life in Numbers performs the formula and projects it across a month and year.
What is a kilowatt-hour?
A kWh is the energy used by a 1,000-watt appliance running for one hour.
Is standby power included?
Add standby wattage separately if a device stays plugged in.
Why can my bill differ?
Taxes, fixed charges, variable tariffs, and real usage patterns can change the final bill.