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Electricity Calculator
Estimate appliance energy consumption and cost
Free, no signup. Calculation data stays in your browser.
Your inputs
Results
Energy used120 kWh
Estimated energy cost480 THB
Uses constant power and your average unit rate. THB 4 is an example, not an official tariff. Does not calculate tiered utility bills or service charges.
Formula and method
Energy in kWh = watts × appliance count × hours per day × days ÷ 1,000. Cost = kWh × unit rate.
Worked example
A 1,000 W appliance running 4 hours daily for 30 days uses 120 kWh. At an assumed THB 4/kWh, the estimated cost is THB 480.
Frequently asked question
Why does the result differ from a utility bill?
The tool uses constant power and your average rate. Actual bills may include tiered tariffs, Ft adjustments, service charges, taxes and other appliances.
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