How Much Does It Cost to Run an Air Conditioner?
AC electricity cost = wattage (W) ÷ 1000 × hours used × electricity rate. A 1200W air conditioner running 8 hours a day for 30 days uses 288 kWh per month. At $0.13/kWh, that's about $37.44 per month. Your actual bill depends on your local rate and whether tiered pricing applies.
How to Find Your AC's Wattage
The wattage is printed on the energy label on the side or back of the unit. Inverter AC units automatically adjust their power output, so the label shows the maximum (rated) wattage. The actual average power draw for inverter units is typically 60–70% of the rated value when running at steady state.
Tips to Reduce Your AC Electricity Bill
Setting the thermostat 1°C higher saves about 7% in electricity. Using a ceiling fan alongside your AC lets you raise the thermostat 2–4°C while feeling equally cool. Cleaning the air filter every 2–4 weeks improves efficiency by 5–15%. Closing blinds and curtains during the hottest part of the day reduces heat gain and lets your AC run less.
Inverter vs. Non-Inverter AC
Inverter AC units adjust compressor speed to match the cooling demand, saving 30–50% compared to older non-inverter (on/off) models. If you run your AC more than 4 hours per day during summer, upgrading to an inverter model typically pays back the cost difference within 2–3 seasons.
Frequently Asked Questions
A 1000W AC uses 1 kWh/hour. At $0.13/kWh, that's $0.13/hour. Check your unit's energy label for the exact wattage.
Raise the thermostat 1°C (saves ~7%), use a fan alongside, clean filters regularly, and close blinds during peak sun hours.