Humidifier: what does it cost to run?
Calculate the cost, compare common appliances, and get one practical saving idea — instantly.
Estimated monthly cost
$1.30A small change based on your numbers
Your energy coach
This appliance is already inexpensive to run. Focus on comfort and useful life, not tiny savings.
Use it one hour less each day
$1.97Possible saving per yearTry a common appliance
One tap. Real numbers.
Whole-home energy check
Where does your home's electricity go?
Build a quick appliance list. WattWorth 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
Useful services
Optional tools beyond WattWorth
A small, clearly marked selection. Open only what is useful to you.
Partner links: the project may receive a reward if you use them. Your price does not increase.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. WattWorth 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.
electricity calculations completed