How Much Does It Cost to Run Air Conditioning in Thailand?
Hourly, monthly and yearly cooling costs at Thailand's current electricity prices, by unit size and efficiency and city, in local currency and U.S. dollars.
By Mark Curant·Updated
Quick answer
At ฿4.62 per kWh (September–December 2026), a typical 1.5 hp (12,000 BTU, 3.5 kW) inverter air conditioner, which uses about 0.70 kWh of electricity an hour, costs about ฿3.24 an hour to run, or ฿777 for a month at 8 hours a day. Over a year it comes to about ฿7,767 in Bangkok (about $231), the hottest city we list, and ฿4,854 in Chiang Mai. In U.S. terms the price is about 13.77¢/kWh, 25% less than the U.S. average.
Per hour
฿3.24
1.5 hp (3.5 kW) inverter, uses 0.70 kWh
Per month
฿777
8 hrs/day × 30 days
Per year, Bangkok
฿7,767
2,400 cooling hours (our estimate)
Your numbers in Thailand
Your AC now (efficiency 3.0)
฿12,945/yr
฿5.39/hr
New unit (efficiency 5.0)
฿7,767/yr
฿3.24/hr
You would save
฿5,178/yr
฿62,134 over 12 years
Efficiency = kW of cooling per kW of electricity over a season (our assumption for a typical new inverter split is 5.0; an old non-inverter or window unit is closer to 3). Hours start at our estimate for Bangkok and the price at ฿4.62; change them for your home and your bill.
Yearly cost by city
This table is for one 1.5 hp (12,000 BTU, 3.5 kW) inverter split, which uses about 0.70 kWh of electricity for each hour it runs. Hours per year is our estimate of how long it runs at full power in each city's climate. Cost per year is those hours × 0.70 kWh × ฿4.62.
| City | Hours the AC runs per year | Cost per year, 1.5 hp inverter split | Same in U.S. dollars |
|---|---|---|---|
| Bangkok | 2,400 | ฿7,767 | $231 |
| Phuket | 2,300 | ฿7,443 | $222 |
| Khon Kaen | 2,000 | ฿6,472 | $193 |
| Chiang Mai | 1,500 | ฿4,854 | $145 |
Cooling hours are our estimate of full-load hours for each city's climate, for one unit. A home cooling several rooms uses more.
The price used here
What this table shows
- Price per kWh: the residential price per unit between 201 and 400 units a month (base rate ฿4.1584 plus the September–December 2026 Ft of ฿0.1623, plus 7% VAT); above 400 units it is about ฿4.84.
- Cost per hour: one 1.5 hp (12,000 BTU, 3.5 kW) inverter split running for an hour at full power (0.70 kWh × the price).
| Utility | Area covered | Price per kWh | Same in U.S. cents | Cost per hour of ACone 1.5 hp inverter split |
|---|---|---|---|---|
| MEA (Bangkok area) and PEA (provinces), same national tariff | the whole country | ฿4.62 | 13.77¢ | ฿3.24 |
Cost by unit size
In Thailand, air conditioners are sold by BTU: a 12,000 BTU unit is about 3.5 kW of cooling. The size is how much cooling the unit puts out, not the electricity it uses.
All at a seasonal efficiency of 5.0 (our assumption for a typical new inverter split) and ฿4.62 per kWh:
| Unit size (cooling output) | Typical use | Cost per hour of running | Cost per month (8 hours a day) | Cost per year in Bangkok (2,400 hours) |
|---|---|---|---|---|
| 1 hp · 2.5 kW (9,000 BTU) | bedroom | ฿2.31 | ฿555 | ฿5,548 |
| 1.5 hp · 3.5 kW (12,000 BTU) | large bedroom or living room | ฿3.24 | ฿777 | ฿7,767 |
| 2 hp · 5 kW (18,000 BTU) | large living room | ฿4.62 | ฿1,110 | ฿11,095 |
| 2.5 hp · 7 kW (24,000 BTU) | open-plan living area | ฿6.47 | ฿1,553 | ฿15,534 |
| Portable | one room, no installation | ฿4.62 | ฿1,110 | ฿11,095 |
What a more efficient unit saves
Seasonal efficiency is how much cooling a unit delivers for each kW of electricity over a whole season. The higher it is, the less electricity it needs for the same cooling. Yearly cost of one 1.5 hp (3.5 kW) unit in Bangkok (2,400 hours a year):
| Seasonal efficiency | What it's like | Electricity per hour | Cost per year | Saved per year vs an old 3.0 unit |
|---|---|---|---|---|
| 3.0 | old non-inverter or window unit | 1.17 kWh | ฿12,945 | — |
| 4.0 | older or basic inverter unit | 0.88 kWh | ฿9,709 | ฿3,236 |
| 5.0 | typical new inverter split | 0.70 kWh | ฿7,767 | ฿5,178 |
| 6.0 | efficient model | 0.58 kWh | ฿6,472 | ฿6,472 |
| 7.0 | top models | 0.50 kWh | ฿5,548 | ฿7,397 |
What to know about electricity prices in Thailand
Thai households pay more per unit as they use more. From September 2026 bills, the first 200 units a month cost about ฿3 each before Ft and VAT, units 201–400 cost ฿4.16, and units above 400 cost ฿4.36. Air conditioning usually pushes a home into the upper blocks, so the price used here is the 201–400 block.
The fuel adjustment charge (Ft) is reset every four months by the Energy Regulatory Commission. For September to December 2026 it is 16.23 satang a unit, and the average household price is about ฿3.86 before VAT.
The same tariff applies in Bangkok (Metropolitan Electricity Authority) and the provinces (Provincial Electricity Authority). Condos and rented rooms sometimes charge their own, higher rate per unit, so check your lease.
Cutting the cost
- Set 25–26°C rather than 20–22°C, and run a ceiling or stand fan with it.
- Close curtains on sunny windows, and keep doors closed so you only cool the room you're in.
- Clean the indoor unit's filters every two to four weeks; humid, dusty air clogs them fast.
- Have the unit serviced (coil and drain cleaning) about once a year.
- When you replace a unit, choose an inverter model with a high energy label rating.
How Thailand compares
Japan
¥38.87/kWh
≈ 24.62¢ US
Singapore
S$0.3116/kWh
≈ 24.40¢ US
Philippines
₱15.06/kWh
≈ 23.79¢ US
Hong Kong
HK$1.699/kWh
≈ 21.65¢ US
South Korea
₩257.6/kWh
≈ 19.43¢ US
Cambodia
៛730/kWh
≈ 17.93¢ US
Vietnam
₫3,618/kWh
≈ 14.11¢ US
Malaysia
RM0.4893/kWh
≈ 11.99¢ US
Taiwan
NT$3.80/kWh
≈ 11.73¢ US
China
CN¥0.6670/kWh
≈ 9.99¢ US
Indonesia
Rp1,444.70/kWh
≈ 8.01¢ US
Brunei
B$0.08/kWh
≈ 6.26¢ US
Thailand: ≈ 13.77¢ US/kWh. U.S. average: 18.31¢/kWh (July 2026). See costs in every U.S. state or Australia.
Frequently asked questions
How much does it cost to run an air conditioner per hour in Thailand?
About ฿3.24 an hour in Bangkok for a typical 1.5 hp (12,000 BTU, 3.5 kW) inverter split, which uses about 0.70 kWh of electricity an hour, at ฿4.62 per kWh. A 1 hp (9,000 BTU) bedroom unit costs about ฿2.31 an hour, an old non-inverter 1.5 hp unit about ฿5.39, and a portable unit about ฿4.62.
How much does air conditioning add to a monthly bill in Thailand?
Running a 1.5 hp inverter split 8 hours a day for 30 days uses about 168 kWh, or about ฿777. Over a year in Bangkok, at our estimate of 2,400 cooling hours, one unit costs about ฿7,767 (about $231).
Is an inverter air conditioner worth it?
Where the AC runs as many hours as it does in Bangkok, usually yes. Replacing an old non-inverter 1.5 hp unit (efficiency about 3) with a typical inverter split (about 5.0) saves about ฿5,178 a year at 2,400 hours.
How we calculated this
Electricity used (kWh) = cooling capacity (kW) ÷ seasonal efficiency × hours. Cost = kWh × price. Price: Energy Regulatory Commission, residential progressive tariff from September 2026 bills (฿4.1584 a unit for 201–400 units, ฿4.3583 above 400) and Ft of 16.23 satang for September–December 2026, plus 7% VAT. U.S. figures use 1 THB = $0.0298 (October 21, 2026, European Central Bank). Cooling hours are our estimate for each city. To check your own price, divide the energy part of your bill by the kWh used.