Electricity Bill Calculator
Find out exactly what is driving your electricity bill. Add any appliance by wattage and hours of use per day — see kWh used and cost at your rate.
| Appliance | Watts | Hrs/Day | Qty | kWh/day | kWh/month | Cost/month | Remove |
|---|---|---|---|---|---|---|---|
| 12.00 | 360.00 | $46.80 | |||||
| 3.60 | 108.00 | $14.04 | |||||
| 5.00 | 150.00 | $19.50 | |||||
| 0.50 | 15.00 | $1.95 | |||||
| 0.50 | 15.00 | $1.95 | |||||
| Total | — | 648.00 | $84.24 | ||||
Monthly Usage
648.00 kWh
Monthly Cost
$84.24
Annual Cost
$1,010.88
Cost by appliance per month (higher = more expensive)
- Air Conditioner$46.80
- Clothes Dryer$19.50
- Refrigerator$14.04
- LED TV$1.95
- Washing Machine$1.95
Estimates assume 30 days/month. Actual bills vary by utility, taxes, and demand charges.
How to use Electricity Bill Calculator
This electricity bill calculator estimates the running cost of any appliance or your whole home from power draw, hours of use and your electricity rate. See the cost per hour, day, month and year, and compare appliances to find what is driving your bill. It turns abstract kilowatt-hours into real money so you can target the biggest savings.
- Enter the appliance power in watts (or kilowatts).
- Set how many hours per day it runs.
- Enter your electricity rate (cost per kWh).
- Review the daily, monthly and yearly running cost.
- Compare appliances to find the biggest energy users.
Your data never leaves your device — 100% private processing.
How appliance running cost is calculated
Energy used (kWh) = power in kilowatts × hours of use. Cost = kWh × your rate per kWh. A 1,500 W heater running 5 hours uses 7.5 kWh per day; at $0.20/kWh that is $1.50 a day, or about $45 a month. Always-on devices and heating/cooling usually dominate a bill far more than small electronics.
| Appliance | Power | Use | Daily cost |
|---|---|---|---|
| LED bulb | 10 W | 5 h | $0.01 |
| Refrigerator | 150 W | 24 h | $0.72 |
| Space heater | 1,500 W | 5 h | $1.50 |
Cutting your electricity bill
Focus on the biggest, longest-running loads: heating, cooling, water heating and refrigeration. Reducing runtime, upgrading to efficient models, and shifting use to off-peak hours where time-of-use rates apply all lower the bill. Standby ("phantom") loads add up too — this calculator helps you quantify each before you act.
Worked examples
Space heater
Inputs: 1,500 W · 5 h/day · $0.20
Result: $1.50/day · ~$45/mo
Refrigerator
Inputs: 150 W · 24 h · $0.20
Result: $0.72/day · ~$22/mo
Glossary
- kWh
- Kilowatt-hour — one kilowatt of power used for one hour; the unit you are billed for.
- Watt
- A unit of power; 1,000 watts equal one kilowatt.
- Rate
- The price you pay per kilowatt-hour of electricity.
- Standby load
- Power drawn by devices left plugged in but not actively used.
Related reading
Frequently Asked Questions
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Why use Electricity Bill Calculator?
- Transparent formulas so you understand every calculation
- Supports multiple currencies and regional tax rules
- Saves you from spreadsheet errors with validated inputs
- Shareable results for discussions with advisors or partners
Common use cases
- Calculate how long to pay off a credit card balance
- Model different mortgage scenarios before house hunting
- Forecast investment growth with compound interest
- Break even analysis for a new product or service
- Compare net salary after tax across different countries
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