Electricity Calculator
Estimate power consumption, kWh usage, and electricity costs for your home appliances.
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Understanding Electricity Usage
Electricity is measured in kilowatt-hours (kWh). This unit represents the energy consumed by a 1,000-watt appliance running for one hour. Understanding your kWh usage is the first step to lowering your electric bill.
How to Calculate kWh
The formula is straightforward: (Watts × Hours) ÷ 1,000 = kWh.
For example, if you have a 1,500-watt space heater running for 3 hours a day:
- 1,500 W × 3 hours = 4,500 Wh
- 4,500 Wh ÷ 1,000 = 4.5 kWh per day
- 4.5 kWh × 30 days = 135 kWh per month
Appliance Energy Usage
Different appliances consume vastly different amounts of power. HVAC systems and water heaters typically account for the largest portion of a home's energy use. Small changes, like switching to LED bulbs or unplugging "vampire" electronics, can add up to significant savings over time.
Solar Savings Potential
Solar panels can significantly offset your electricity costs. By generating your own power during peak sunlight hours, you reduce the amount of energy you need to buy from the grid. Our calculator allows you to simulate a solar offset percentage to see potential monthly savings.