Electricity Cost Calculator
Estimate daily kWh and monthly/yearly cost from appliance watts, daily hours, and your electricity price.
Enter values above, then press Calculate.
Tip: For best accuracy, measure real watts/kWh using a plug-in meter (see our guide below).
How it works
kWh per day = (Watts × Hours) ÷ 1000
Monthly cost ≈ kWh/day × 30 × price
Yearly cost ≈ kWh/day × 365 × price
What to measure first
Space heaters, dehumidifiers, old fridges, aquarium heaters, gaming PCs, and dryers are common energy hogs.
Next step
Use the calculator to estimate cost, then follow our DIY Home Energy Audit to find the biggest bill drivers.