kWh Cost Calculator
Calculate the electricity cost of running an appliance for a given time.
Calculate
Enter your values below.
Result
Energy used
0
Cost
0
Formula used
Cost = (Watts × Hours ÷ 1000) × Rate per kWh
Example: 1,500 W appliance for 3 hours at $0.15/kWh → 4.5 kWh, cost = $0.675.
How to use this calculator
- Enter Appliance power (watts), Hours used, Electricity rate (per kWh).
- Press Calculate to see your result instantly.
FAQ
Frequently asked questions
Where do I find an appliance's wattage?
Usually printed on a label on the device itself, or in its manual/specifications.
Where do I find my electricity rate?
Check your utility bill for the per-kWh rate you're charged.
Does this include fixed charges on my bill?
No, this covers only the usage-based cost of running this specific appliance.
How can I use this to compare appliances?
Run the calculation for each appliance's typical wattage and usage hours to compare their running costs directly.