1,500 W heater, 2 hours/day, $0.15/kWh
- Daily = 3 kWh
- Monthly ≈ 90 kWh
- Monthly cost ≈ $13.50
finance calculator
Appliance Electricity Cost Calculator
Estimate daily, monthly, and yearly energy use and cost for any appliance.
Results
- Daily energy
- 3.00 kWh
- Monthly energy
- 90.00 kWh
- Yearly energy
- 1095.00 kWh
- Daily cost
- $0 USD
- Monthly cost
- $14 USD
- Yearly cost
- $164 USD
How to use this calculator
- Enter appliance wattage, hours per day, days per month, and your electricity rate.
- See daily, monthly, and yearly kWh and cost.
Inputs explained
- Appliance wattage
- Rated power draw in watts.
- Hours per day
- Average daily runtime.
- Days per month
- How many days you use it monthly (use 30 for daily use).
- Electricity rate ($/kWh)
- Your utility’s rate per kilowatt-hour.
How it works
Daily kWh = (wattage × hours per day) ÷ 1000.
Multiply by days per month for monthly energy; by 365 for yearly.
Cost = kWh × electricity rate.
Formula
kWh/day = (W × hours) / 1000 Cost = kWh × rate
When to use it
- Estimating cost of an appliance over a month or year.
- Comparing devices or usage patterns on your electric bill.
- Budgeting for new appliances before purchase.
Tips & cautions
- Actual draw can differ from nameplate wattage—measure with a power meter for accuracy.
- Time-of-use plans can change costs by time of day; this uses a flat rate.
- Assumes constant wattage; variable-speed devices may use less on average.
- Does not include demand charges or tiered pricing.
Worked examples
300 W PC, 5 hours/day, $0.12/kWh
- Daily = 1.5 kWh
- Monthly ≈ 45 kWh
- Monthly cost ≈ $5.40
Deep dive
This appliance electricity cost calculator estimates daily, monthly, and yearly kWh and cost from wattage, usage hours, and your $/kWh rate. Enter your appliance info to see how it affects your bill.
Use it to compare devices, plan energy budgets, and decide if reducing run time or upgrading to more efficient models makes sense.
FAQs
- Does this include standby power?
- No. Add extra usage if your device draws power while idle.
Related calculators
Actual rates and usage vary. Check your utility bill for precise pricing.