Work out what an appliance costs to run from its power draw, daily usage and your price per kWh.
How to use the Electricity Cost
Enter the appliance power in watts (check its label or manual).
Set how many hours per day you use it and your electricity price per kWh.
Read the cost per day, month and year, plus the yearly energy use.
This calculator turns an appliance's power draw and daily use into the cost per day, month and year, along with its annual energy consumption in kilowatt-hours.
It is useful for spotting the expensive devices in your home, comparing an old appliance against a more efficient new one, or estimating what a heater, fridge, PC, air conditioner or pool pump adds to your bill.
The maths is simple: energy per day is the power in kilowatts times the hours used, and multiplying by your price per kilowatt-hour gives the daily cost, which then scales to the month and year.
An appliance's wattage is usually printed on its type label, the plug or in the manual, in watts. For devices that cycle on and off, like a fridge or a thermostat-controlled heater, use the average power rather than the peak.
Standby and phantom loads add up too: devices left in standby draw a few watts around the clock, which over a year can cost real money across many gadgets, so it is worth checking always-on devices.
Electricity prices vary by country, tariff and year, so enter the rate from your own contract for an accurate result. Everything is calculated in your browser.
Frequently asked questions
Energy per day is the power in kilowatts times the hours used. Multiplying by your price per kWh gives the daily cost, which scales to the month and year.
It is usually printed on the type label, the plug or in the manual, given in watts (W). For devices that switch on and off, use the average power.
In Germany household electricity is often around 0.30 to 0.40 EUR per kWh, but it varies by tariff and year, so enter the rate from your own contract.
Anything that heats or cools: electric heaters, ovens, kettles, tumble dryers, air conditioners and water heaters. Always-on devices like fridges add up through constant use.
Yes. Devices in standby draw a few watts continuously. Across a household of gadgets that can add up to a noticeable amount over a year, which switching them off avoids.
Embed this tool
Add this tool to your own website. Copy the snippet below; it stays up to date automatically.
<iframe src="https://monu.tools/embed/en/stromkosten-rechner" width="100%" height="640" style="border:1px solid #e5e5e5;border-radius:12px;max-width:680px" loading="lazy" title="Monu Tools"></iframe>Related tools
Calculate your Italian degree grade (voto di laurea) from exam grades in trentesimi. Enter each exam grade and CFU, add thesis points and bonus, and get the 110-scale grade plus ECTS and approximate US GPA.
A simple tap counter. Count up or down with one tap, great for reps, people, stitches or inventory.
Generate strong, random passwords with full control over length and character types. Everything happens in your browser.
Create a QR code from any text or URL. Choose the error correction, colors and quiet zone, then download it as PNG or SVG. Everything runs in your browser.