Electricity Bill Calculator
Estimate your monthly electricity costs and find savings
Electricity Cost Formulas
Understanding Your Electricity Bill
Electricity is measured in kilowatt-hours (kWh). A kilowatt-hour is using 1,000 watts for one hour. For example, a 100-watt light bulb running for 10 hours uses 1 kWh. Your bill shows total kWh used and the rate charged per kWh.
Electricity rates vary significantly by location, from $0.08/kWh in some states to $0.30+/kWh in others. Time-of-use rates may charge more during peak hours. Check your bill for your actual rate.
This calculator helps you understand costs for individual appliances or estimate your total bill. Identifying energy hogs is the first step to reducing your electricity expenses.
Common Appliance Power Usage
Refrigerator
150-400 watts. Runs constantly but cycles on/off. ~$5-15/month.
AC/Heating
1000-5000 watts. Largest energy user in most homes. $50-200+/month.
Water Heater
3000-4500 watts (electric). Second largest user. $20-50/month.
Dryer
2000-5000 watts. 1 hour/load. $0.30-1.00 per load.
Appliance Wattage Reference
| Appliance | Watts | Daily Use | Monthly Cost* |
|---|---|---|---|
| LED Light Bulb | 10W | 5 hrs | $0.45 |
| Laptop | 50W | 8 hrs | $3.60 |
| Desktop Computer | 200W | 8 hrs | $14.40 |
| TV (55") | 100W | 4 hrs | $3.60 |
| Microwave | 1200W | 0.25 hrs | $2.70 |
| Space Heater | 1500W | 8 hrs | $108.00 |
Tips to Lower Your Electricity Bill
Switch to LED Bulbs
LEDs use 75% less energy than incandescent. A $3 LED saves $50+ over its lifetime.
Optimize Thermostat
Every degree of AC/heating adjustment saves 3% on bills. Use programmable thermostats.
Eliminate Phantom Loads
Devices on standby still draw power. Use power strips to truly disconnect electronics.
Use Time-of-Use Rates
Run dishwashers, laundry at off-peak times. Can save 20-30% on applicable usage.
Frequently Asked Questions
How do I find my electricity rate?
Check your electricity bill for 'price per kWh' or 'rate.' US average is about $0.12-0.15/kWh, but ranges from $0.08 (Louisiana) to $0.30+ (Hawaii, California). Include delivery charges for true cost.
Why is my bill higher than the calculator estimate?
Bills include fixed charges, delivery fees, taxes, and surcharges beyond usage. Also, you may be underestimating usage hours or missing high-draw appliances like HVAC.
What uses the most electricity in a home?
Typically: HVAC (40-50%), water heater (15-20%), appliances (15%), lighting (10%), electronics (10%). HVAC is the biggest opportunity for savings.
Are smart devices worth it for energy savings?
Smart thermostats typically save 10-15% on heating/cooling. Smart power strips eliminate standby draw. Payback period is usually 1-2 years.
Pro Tips
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