Electricity Bill Calculator — Calculate Energy Costs
Calculate the cost of running your appliances and devices.
Check device label or manual
Check your utility bill
About Electricity Bill Calculator
The Electricity Bill Calculator helps you estimate the cost of running electrical appliances and devices. Input the wattage, usage hours, and your electricity rate to calculate daily, monthly, and annual costs.
This calculator is perfect for understanding which appliances contribute most to your electricity bill and estimating the cost savings of upgrading to more efficient devices. It uses the standard formula: (Wattage × Hours) ÷ 1000 × Rate = Cost.
How to Use Electricity Bill Calculator
- Enter the appliance wattage (usually on the label).
- Input daily usage hours for the appliance.
- Enter your electricity rate per kWh (from your bill).
- Review daily, monthly, and annual electricity costs.
- Compare costs across multiple appliances to optimize savings.
Key Features
Calculate electricity costs accurately
Daily, monthly, and yearly estimates
Custom electricity rates
kWh consumption display
Multiple time period calculations
Compare appliance costs
Instant results
100% client-side processing
Frequently Asked Questions
How do I calculate my electricity bill?
Multiply the appliance wattage by hours used, divide by 1000 to get kWh, then multiply by your electricity rate. For example: 1000W appliance × 5 hours = 5 kWh × $0.12/kWh = $0.60 per day.
What is a kWh?
A kilowatt-hour (kWh) is a unit of energy equal to using 1000 watts for one hour. It's the standard billing unit for electricity. For example, a 100W bulb running for 10 hours uses 1 kWh.
How can I reduce my electricity bill?
Use energy-efficient LED bulbs, unplug devices when not in use, use programmable thermostats, run appliances during off-peak hours if you have time-of-use rates, and maintain HVAC systems regularly.
Where can I find my electricity rate?
Your electricity rate (per kWh) is listed on your utility bill, typically in cents per kWh. Rates vary by location and provider, ranging from $0.08 to $0.30+ per kWh in the US.
Do appliances use electricity when turned off?
Yes, many devices draw 'phantom power' or 'standby power' even when off but still plugged in. TVs, chargers, microwaves with clocks, and cable boxes can use 5-10W continuously, adding to your bill over time.