What does it cost to run?
Enter an appliance's power rating, how long you use it and your electricity price. You'll see the cost per hour, day, week, month and year. Free, no sign-up, and nothing you type leaves your device.
Want to see every bill in one place?
The Monthly Budget Planner spreadsheet tracks every bill and expense each month, shows where your money goes and what's left. Excel and Google Sheets. No app, no sign-up, no subscription.
How it works
The sum
Watts divided by 1,000 gives kilowatts. Kilowatts times hours gives the energy used in kilowatt-hours (kWh), and kWh times your price per kWh gives the cost. A year is worked out as 365 days, so a week is 7/365 of it, and a month is a year divided by 12. Amounts are rounded to the cent.
Example
A 2,400 W heater used 4 hours a day is 2.4 kW x 4 = 9.6 kWh a day. At 30 cents per kWh that's $2.88 a day, or about $1,051 a year if you use it every day.
Why your real cost may differ
Many appliances don't run at full power all the time. Heaters and air conditioners with a thermostat switch on and off, and fridges cycle through the day. Your bill also has a daily supply charge that this doesn't include, and some plans charge different rates at different times of day. Use the rate for when you actually run the appliance.
This is a planning tool, not financial advice.