living · free calculator
Appliance electricity cost calculator
Estimate one appliance’s energy use from its wattage, hours used per day and number of days. Multiply that energy by the baht-per-kilowatt-hour rate on your own bill. This is a constant-power model, not a Thai utility tariff calculator. Cycling appliances, fixed charges, tax and tiered rates can change the actual bill.
Complete the main fields. Optional details start at zero. Example inputs are fictional, not local quotes.
Your calculation
Result from your inputs
Complete the main fields to see a result. Inputs stay in this page.
See the calculation.
Energy kWh = watts ÷ 1,000 × daily hours × days. Modeled energy charge = kWh × entered THB per kWh.
A worked example
1,000 W × 4 hours/day × 30 days ÷ 1,000 = 120 kWh; multiply by your own rate.
What the result leaves out
Read the rate from your contract or bill. No PEA rate or landlord markup is assumed. Rated power may differ from average power, particularly for air conditioning.
For help choosing inputs, read the worked guide for this calculation.
Primary reference: NIST: SI energy units
Checked 23 October 2026 · Source date: SI reference.
Appliance energy estimate only