Aircon Energy Cost Calculator
Estimate your monthly TNB electricity cost for running your aircon — and see how much you'd save with an inverter upgrade.
Energy Cost Estimator
Estimate your monthly TNB aircon bill
Want to Reduce Your Energy Bills?
Our energy-efficient AC solutions can help you save up to 30% on cooling costs.
Or message us on WhatsAppTNB Domestic Tariff (2024)
| Monthly Usage | Rate/kWh |
|---|---|
| First 200 kWh | RM 0.218 |
| 201–300 kWh | RM 0.334 |
| 301–600 kWh | RM 0.516 |
| 601–900 kWh | RM 0.546 |
| Above 900 kWh | RM 0.571 |
Tiered tariff — the more you use, the higher the rate on each additional unit.
Does a dirty aircon cost more to run?
Yes — significantly. A clogged evaporator coil forces the compressor to work harder to achieve the same cooling. Studies show a dirty aircon can use 20–30% more electricity. A chemical wash restores up to 95% efficiency, which often pays for itself in 3–6 months of lower TNB bills.
Related tools
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→ BTU Calculator
Find the right aircon HP for your room size.
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→ Aircon Service Finder
Find out whether you need a wash, repair, or new unit.
Common questions about aircon energy costs
How accurate is this estimate?
The estimate uses TNB's current domestic tiered tariff applied to your total monthly usage. Your actual bill also includes household usage from other appliances, so this calculator shows the aircon contribution specifically. Actual results vary ±10–15%.
Is an inverter aircon worth it in Penang?
Almost always yes for heavy users (8h/day+). Inverter units cost 15–25% more upfront but use 30–50% less electricity. In Penang's climate where aircon runs most of the year, most households break even within 2–3 years.
Why does a higher kWh band matter?
TNB charges progressively higher rates as you use more. If your aircon pushes your household into the 301–600 kWh band, not just the aircon units but all of your usage above that threshold gets billed at the higher rate. This makes energy-efficient units especially valuable.
High TNB bills? Let us check your aircon.
A chemical wash restores efficiency and often cuts electricity costs within the first month. WhatsApp us to book.