Electricity Cost Calculator
Calculate how much electricity appliances use and estimate your monthly electric bill.
US average: $0.12/kWh. Check your bill for exact rate.
1500W Appliance Cost
Cost Breakdown
Common Appliances Comparison
Electricity Cost Calculator Guide
This calculator estimates how much an appliance or monthly electricity use may cost based on kilowatt-hours and your electricity rate. It is helpful for comparing devices, checking whether a bill looks reasonable, and finding where efficiency improvements could save money.
How to Use It
- Choose whether you want to estimate from appliance wattage or from total monthly kWh.
- Enter the device wattage, daily hours, and local rate, or enter the billed kWh directly.
- Review daily, monthly, and yearly cost estimates.
- Compare the result with your utility bill because taxes, fees, and tiered rates can add extra cost.
Cost Formula
Most appliance-level electricity estimates use a simple power and time formula.
Electricity Cost
Where:
- Watts= Appliance power draw
- Hours= Usage time
- Rate per kWh= Local electricity price
Why Your Bill Can Be Higher
A simple kWh estimate often misses delivery charges, taxes, time-of-use pricing, demand charges, and standby power. Refrigerators, routers, cable boxes, and chargers may also use power when you are not actively thinking about them.
Worked Examples
Space Heater Example
Problem:
A 1,500 W heater runs 4 hours per day at $0.15 per kWh.
Solution Steps:
- 1Daily kWh = 1,500 x 4 / 1000 = 6
- 2Daily cost = 6 x $0.15 = $0.90
- 3Monthly cost at 30 days is about $27
Result:
High-watt appliances can add up quickly even with moderate use.
Monthly Bill Check
Problem:
A household used 900 kWh in a month at $0.17 per kWh.
Solution Steps:
- 1Base energy charge = 900 x $0.17
- 2Estimated energy portion is $153 before fees and taxes
Result:
The bill total may be higher once delivery and utility charges are added.
Tips & Best Practices
- ✓Use the rate from a recent utility bill instead of a national average when possible.
- ✓Check devices with standby power, not only large appliances.
- ✓Compare daily habits before making expensive equipment changes.
- ✓Track both cost and kWh so the estimate stays useful when rates change.
Frequently Asked Questions
Sources & References
Last updated: 2026-05-20
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
Formula Source: Standard Mathematical References
by Various