Electricity Cost Calculator for Any Appliance
The electricity cost calculator estimates how much your appliances cost to run, based on their wattage, daily usage hours, and your local electricity rate. Enter those three numbers and you instantly see the cost broken down by day, month, and year.
Whether you want to trim your power bill, compare a new appliance against an old one, or build a realistic home budget, this tool turns watts and hours into clear running-cost figures. Add as many appliances as you like and watch the totals update as you go.
How to Calculate Electricity Cost
Set your electricity rate
Type the price you pay per kilowatt-hour (kWh) in the Electricity Rate field — you will find it on your electricity bill. Pick your currency from the dropdown; the tool auto-detects one from your locale and lets you search the full list.
Add an appliance
Tap a Quick Add preset to fill the form with a typical wattage and usage, or enter your own under Appliance, Wattage, Hours/Day, and Qty. Press Add or hit Enter.
Review your costs
Each appliance shows its own monthly cost and daily kWh, while the Total Electricity Cost summary gives you the daily, monthly, and yearly totals plus the energy used in kWh.
Adjust and compare
Tweak any value, remove a single item with its trash button, or use Clear All to start over. Your list is saved automatically and restored the next time you return.
Features
Daily, Monthly & Yearly Costs
See running costs split across three time periods, with the monthly figure highlighted to match most billing cycles.
15 Appliance Presets
Quick Add buttons cover common devices like air conditioner, refrigerator, washing machine, TV, and more, each with a typical wattage.
Custom Appliance Entry
Add any device by name with its own wattage, daily hours, and quantity to match exactly what you run at home.
Per-Appliance Breakdown
Every item lists its monthly cost and daily kWh so you can spot the most power-hungry appliances at a glance.
Energy Usage in kWh
Beyond cost, the totals show daily, monthly, and yearly energy consumption in kilowatt-hours.
40+ Currencies
Pick from a searchable currency dropdown that auto-detects your local currency from your browser locale.
Adjustable kWh Rate
Enter the exact rate from your bill so estimates reflect what you actually pay per kilowatt-hour.
Saved Automatically
Your appliance list, rate, and currency are stored in your browser and restored on your next visit.
Frequently Asked Questions
How do I calculate the cost to run an appliance?
Multiply the appliance's wattage by the hours you use it each day and by the quantity, then divide by 1,000 to get daily kWh. Multiply that by your electricity rate for the daily cost — the calculator does this for you and also shows the monthly and yearly totals.
How do I convert watts to kWh?
Kilowatt-hours measure energy over time: watts multiplied by hours of use, divided by 1,000. For example, a 1,500 W air conditioner running 8 hours uses 1,500 × 8 ÷ 1,000 = 12 kWh per day.
Where do I find my electricity rate?
Your rate is printed on your utility bill, usually as a price per kWh. In the US the average residential rate is around $0.12–$0.16 per kWh; in Europe it often falls between €0.20 and €0.35 per kWh. Check your most recent bill for the exact figure.
What does the wattage number mean?
Wattage (W) is how much power an appliance draws while it runs. You will usually find it on a label on the appliance, in the manual, or on the manufacturer's website. Higher wattage means more electricity used per hour.
How accurate are the estimates?
They are a solid approximation based on steady usage. Real bills can differ because utilities use tiered pricing, seasonal rates, demand charges, and taxes. The figures are most useful for comparing appliances against each other. Monthly totals use 30 days and yearly totals use 365 days for consistency.
Can I add the same appliance more than once?
Yes. Use the Qty field for several identical units, or add separate entries with different hours to model varied usage — for example, an air conditioner run 12 hours in summer and 4 hours in spring.
Is my data saved and is it private?
Your appliance list, electricity rate, and currency are stored in your browser's local storage, so they persist across sessions on the same device and browser. Nothing is sent to a server, and clearing your browser data resets the calculator.
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