This free electricity bill calculator helps you estimate the cost of running any household appliance. Simply select your appliance, enter its power consumption, how many hours you use it per day, and your local electricity rate — and the tool will instantly show your daily, monthly, and yearly costs. It's fast, accurate, and completely free to use on CheckBillOnline.com.
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⚡ Estimated Electricity Cost
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Per Month
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Note: Assumes 30 days/month and 365 days/year. Results are estimates only.
How to Use This Electricity Bill Calculator
The CheckBillOnline.com Electricity Bill Calculator is the easiest way to find out how much any household appliance costs to run. It works for any country and any currency. Here is a step-by-step guide to using it correctly:
Step 1 – Select Your Country: Choose the country you live in from the dropdown at the top. This sets the currency context for your results so you can relate the numbers to your actual electricity bill.
Step 2 – Choose an Appliance: Select a common household appliance from the "Typical appliance" dropdown. The calculator will automatically fill in the average wattage for that appliance. If your appliance is not listed, choose "Custom appliance" and enter the wattage manually from the label on the device.
Step 3 – Enter Power Consumption: The power field will auto-fill when you select an appliance. You can change it if your model is different. Switch between Watts (W) and Kilowatts (kW) using the unit dropdown next to it.
Step 4 – Set Capacity %: Most appliances do not run at 100% power all the time. For example, a refrigerator cycles on and off. If your appliance runs continuously at full power, leave it at 100%. Otherwise, adjust accordingly (e.g., 50% for a cycling fridge).
Step 5 – Hours of Use Per Day: Enter how many hours you use this appliance daily. For always-on devices like a refrigerator or Wi-Fi router, enter 24. For a hair dryer you use 15 minutes a day, enter 0.25.
Step 6 – Enter Your kWh Rate: Look at your electricity bill and find the per-unit rate (cost per kilowatt-hour). Enter this number and select whether it is in Cents or in full currency units (Dollars, Rupees, etc.).
Step 7 – Click Calculate: Hit the green Calculate button. The tool instantly shows your estimated electricity cost per day, per month, and per year. Use the Reset button to start a new calculation.
kWh Cost Calculation
Energy Consumption Formula:
E (kWh/day) = Power (W) × Hours/day × Capacity% ÷ 1000
Electricity Cost Formula:
Cost (per day) = E (kWh/day) × Cost per kWh ÷ 100 (if entered in cents)
🧮 Example: Running a 1500W Air Conditioner for 8 hours/day at Rs. 50/kWh
✅ Power: 1500 W = 1.5 kW
✅ Hours per day: 8
✅ Capacity: 100%
✅ kWh rate: Rs. 50 (entered as 50 in "Full unit" mode)
Daily kWh: 1.5 × 8 × 1.0 = 12 kWh
Daily cost: 12 × 50 = Rs. 600
Monthly cost: 600 × 30 = Rs. 18,000
Yearly cost: 600 × 365 = Rs. 2,19,000
Amount of Energy Used by Common Appliances
Estimated wattage ranges based on reputable sources. Actual usage may vary by model and settings.
Common Appliance
Estimated Wattage (W)
Air conditioner (central)
3500 – 5000
Air conditioner (window)
500 – 1440
Blender
300 – 1000
Clothes dryer (electric)
3000 – 6000
Coffee maker
800 – 1400
Computer (desktop)
60 – 300
Dishwasher
1200 – 2400
Electric kettle
1500 – 1800
Electric oven (single)
2000 – 5000
Electric range
2000 – 5000
Electric water heater
3000 – 4500
Fan (ceiling)
50 – 75
Fan (portable)
50 – 100
Freezer (chest)
100 – 200
Freezer (upright)
150 – 250
Hair dryer
1200 – 1875
Iron
1000 – 1800
Laptop
50 – 100
Microwave oven
600 – 1500
Refrigerator (frost-free)
725 – 1100
Refrigerator (top-freezer)
350 – 600
Refrigerator (bottom-freezer)
450 – 800
Space heater (electric)
750 – 1500
Television (CRT)
120 – 180
Television (LCD)
150 – 400
Television (LED)
50 – 150
Toaster
800 – 1500
Toaster oven
1200 – 1800
Vacuum cleaner (upright)
600 – 1200
Vacuum cleaner (canister)
1000 – 2000
Washing machine (top-load)
350 – 500
Washing machine (front-load)
200 – 500
Water pump
250 – 1000
Water heater (gas)
3000 – 4000
Water heater (electric)
3000 – 5500
Wi-Fi router
2.5 – 12
Window fan
40 – 100
Xbox One
110 – 245
PlayStation 5
90 – 150
Frequently Asked Questions (FAQ)
How accurate is this electricity bill calculator? ▾
This calculator is highly accurate as long as you enter correct values. The appliance wattages listed are industry averages. For the most precise result, find the wattage label on your actual appliance and enter it manually. Your utility bill's kWh rate should also be entered exactly as shown on your bill.
Where can I find my kWh electricity rate? ▾
Your kWh rate (cost per unit) is printed on every electricity bill. Look for a line that says "Energy charge", "Per unit cost", or "Rate per kWh". In Pakistan it is shown in Rupees per unit (kWh). In Australia and the US it is usually shown in cents per kWh. Enter it exactly as shown and select the correct unit (Cents or full currency unit).
What does the "% capacity" field mean? ▾
Many appliances do not run at full power the whole time they are switched on. A refrigerator, for example, compresses for only part of the time — it might run at about 40–50% effective capacity over 24 hours. A hair dryer used for 10 minutes runs at close to 100% while on. Setting 100% means you assume the full wattage is being drawn for the entire duration you enter in "Hours of use per day".
Can I use this calculator for solar or off-grid setups? ▾
Yes. The kWh consumption figures are valid regardless of your energy source. The daily, monthly, and yearly kWh values shown in the results help you size your solar panels or battery bank. Simply enter a kWh cost of 0 if you want to see only the energy consumption without a cost estimate.
Why does my actual bill differ from the estimate? ▾
Your actual bill can differ due to: (1) tiered pricing where your rate changes after a certain usage threshold, (2) taxes, surcharges, and fixed monthly fees that this calculator does not include, (3) actual usage habits that may differ from your estimates, and (4) appliance efficiency variations between models. This tool gives a solid baseline estimate — always cross-check with your actual bill.
How do I calculate cost for multiple appliances? ▾
Calculate each appliance one at a time, note down the daily cost for each, and then add them all together. A future version of this tool on CheckBillOnline.com will include a multi-appliance mode. For now, this is the most accurate method.
Does the calculator work for Pakistan electricity tariffs? ▾
Absolutely. Select "Pakistan" as your country, enter your current per-unit rate in Rupees (shown on your WAPDA/LESCO/K-Electric bill), and choose "Dollars / Full unit" (since the rate is in Rupees, not paisa). The results will show your cost in your local currency. Pakistan's electricity rate varies by slab — use the rate applicable to your consumption bracket for the best estimate.
Is this tool free to use? ▾
Yes. The Electricity Bill Calculator on CheckBillOnline.com is completely free to use, with no registration required. You can use it as many times as you like for any appliance or country.
About the Author
CB
CheckBillOnline Editorial Team
Energy & Utility Experts · CheckBillOnline.com
The CheckBillOnline.com team specialises in building free, accurate, and easy-to-use financial and utility calculators for everyday users. With a focus on electricity, gas, water, and telecom bills across multiple countries, the team is dedicated to helping households and businesses better understand and manage their utility costs. All calculators on CheckBillOnline.com are built using verified formulas, regularly updated rate data, and real-world appliance benchmarks from reputable sources. Our mission is simple: empower every bill-payer with the tools to make smarter energy decisions.
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