A 1.5 ton AC is the most popular size for rooms between 120–180 sq. ft. in Indian homes. A 1.5 ton AC wattage ranges between 1.2 kW and 1.8 kW per hour (roughly 1.2 to 1.8 units per hour), depending on BEE star rating, inverter type, and room conditions. This guide covers exact watt and unit figures by star rating, 3-star vs 5-star comparison, monthly bill calculation, ampere consumption, and brand-wise data. And what is the role of a star rating? In this detailed article, we will walk you through the power consumption of a 1.5 ton air conditioner per hour, the difference between 3-star and 5-star air conditioners, and also introduce you to inverters and assist you in accurately calculating the cost of consuming this unit.
1.5 Ton AC Power Consumption – Quick Info
| AC Type |
Watts (approx.) |
Units/Hour |
Monthly Units (8 hrs/day) |
Monthly Bill (₹8/unit) |
| 5-Star Inverter |
900–1,350 W |
0.9–1.35 |
216–324 units |
₹1,728–₹2,592 |
| 5-Star Non-Inverter |
1,200–1,350 W |
1.2–1.35 |
288–324 units |
₹2,304–₹2,592 |
| 3-Star Inverter |
1,100–1,500 W |
1.1–1.5 |
264–360 units |
₹2,112–₹2,880 |
| 3-Star Non-Inverter |
1,500–1,700 W |
1.5–1.7 |
360–408 units |
₹2,880–₹3,264 |
| 2-Star Non-Inverter |
1,700–1,900 W |
1.7–1.9 |
408–456 units |
₹3,264–₹3,648 |
How Many Units Does a 1.5 Ton AC Use Per Hour?
On average, a 1.5-ton AC’s power consumption per hour ranges from 1.2 to 1.8 units (kWh) of electricity. A 5-star AC uses approximately 1.2–1.35 units per hour. A 3-star AC uses approximately 1.5–1.7 units per hour. A 2-star AC uses approximately 1.7–1.9 units per hour. ‘1.5 ton’ refers to cooling capacity (18,000 BTU/hr) and does not equal 1,500 watts — actual wattage depends on ISEER rating.
Star rating (3-star or 5-star)
Room Insulation
Outdoor Temperature
Usage Duration
On average, a 1.5-ton AC consumes between 1.2 kW and 1.8 kW of power per hour.
1.5 Ton AC Power Consumption of different BEE Ratings
| Star Rating |
Power Consumption |
Units Per Hour |
Annual Energy Consumption |
Electricity Bill |
Upfront Cost |
Long term Saving |
| 5 Star |
Lowest |
1.2- 1.35 units |
750- 850 units |
Least |
Highest |
Very High |
| 4 Star |
Low |
1.35- 1.5 units |
850- 950 units |
Lower |
Slightly High |
High |
| 3 Star |
Moderate |
1.5- 1.7 units |
950- 1050 units |
Higher |
Moderate |
Moderate |
| 2 Star |
Highest |
1.7- 1.9 units |
1050- 1200 units |
Highest |
Lowest |
Low |
If the daily usage is more than 6-8 hours, a 1.5 Ton 5 Star AC power consumption will result in noticeable savings.
3-Star vs 5-Star AC Power Consumption
| Parameter |
3-Star AC |
5-Star AC |
Saving |
| Power per hour |
1.5–1.7 kW |
1.2–1.35 kW |
~20–25% less |
| Units per 8 hours |
12–13.6 units |
9.6–10.8 units |
~2–3 units/day |
| Monthly (8 hrs/day) |
360–408 units |
288–324 units |
~70–80 units/month |
| Annual saving (₹8/unit) |
— |
— |
₹6,720–₹7,680/year |
1.5 Ton Inverter AC Power Consumption Per Hour
Inverter technology greatly changes the game because instead of switching on and off, the compressor operates at varying capacities according to the rate of cooling required.
1.5 ton inverter AC power consumption per hour ranges between:
- 0.8 units (after temperature stabilises)
- 1.2–1.4 units during active cooling.
A 3-star inverter AC, with a power consumption of 1.5 ton works in comparison to a 5-star non-inverter air conditioner as its functions are steady.
In short, the power consumption of a 1.5 Ton inverter AC is efficient in practical usage.
1.5 Ton AC Current Consumption
If you are dealing with wiring or capacity issues, you might be curious about the power consumption of a 1.5-ton AC.
Typically,
Power rating: 1500 watts (approx.)
Voltage in India: 230V
Current = Power / Voltage
= 1500 / 230 ≈ 6.5–7
This may differ slightly depending on the model and star rating of your AC.
1.5 Ton AC Energy Consumption
Mostly in Indian households split AC is used. 1.5 Ton split AC energy consumption mainly depends on:
- Installation quality
- Gas pressure
- Clean filters
- Thermostat settings
Poor maintenance of the split AC can increase the 1.5 Ton AC electricity consumption per hour by almost 10-20%.
How to Calculate a Monthly Electricity Bill
Let’s assume:
- 1.5 ton AC unit consumption per hour = 1.3 units
- Usage = 8 Hours Daily
- Electricity rate = ₹8 / unit
Daily Consumption:
1.3 x 8 = 10.4
Monthly Consumption:
10.4 x 30 = 312 units
Monthly cost:
₹312 × ₹8 = ₹2,496
This is how you can estimate how your 1.5 ton AC electricity consumption per hour affects your bill. You can calculate your electricity bills according to your AC brand, capacity, type, electricity rate, and BEE star rating by using NoBroker AC Electric Consumption Calculator before buying to make a well-informed decision.
Tips to Reduce 1.5 Ton AC Power Consumption
To manage 1.5 ton AC Power Consumption, follow these steps:
- Set the temperature to around 24-26°C.
- You should use a ceiling fan with AC.
- Clean filters every 2-3 weeks without a miss.
- Ensure proper room insulation.
- Service AC annually without fail.
- Close doors and windows tightly so the cooling doesn’t get out.
Even small habits can have a large impact in cutting down on electric consumption.
Conclusion
Understanding the power consumption of a 1.5 ton AC helps you make better decisions when choosing the right air conditioner. It may be 1.5 ton 3-star AC power consumption, 1.5 ton 5-star AC power consumption, 1.5 ton inverter AC power consumption, or 1.5 ton inverter AC power consumption per hour, depending on your requirements and your budget. If you use your AC daily for long hours, then you should invest in a 5-star inverter-type AC, as it will actually result in savings in the long run. For occasional use, a 3-star AC would do. Always compare and check the ISEER rating and annual energy consumption stated on the BEE label while purchasing an air conditioner. By making an informed choice today, you will save thousands on your electricity bills tomorrow.
Other AC Power Consumption Guides
NoBroker provides in-depth guides on AC power usage across types, tonnage, and star ratings. Learn how to choose energy-efficient ACs and manage your electricity bills effectively. Explore our other popular guides to stay informed.
Our Brand-Wise AC Power Consumption Guide
Compare how much electricity different AC brands use in simple terms. Understand efficiency and cooling performance to choose the right AC for your home while keeping your monthly electricity bills lower.
1.5 Ton AC Power Consumption: FAQ’s
1. How much is 1.5 Ton AV power consumption per hour?
Ans- It normally consumes 1-1.8 units of electricity per hour, depending onthe AC’s star rating.
2. What is 1.5 ton AC electricity usage per hour in India?
Ans- typically, the average power consumption of an AC that runs at 1.5 tons, on average, will use 1.2-1.5 watts of electricity.
3. What is 1.5 ton 5 star AC power consumption?
Ans- A 5-star AC with a capacity of 1.5 tons has a power consumption of around 1.2 to 1.4 units per hour, which makes it more efficient.
4. What is the power consumption of a 1.5-ton 3-star AC?
Ans- A 3-star AC with a capacity of 1.5 tons has a power consumption range of around 1.5 to 1.8 units per hour.
5. How much is 1.5 ton 5 star AC power consumption compared to 3-star?
Ans- 1.5 ton AC with 5-star rating can save up to 10-20% more electricity as compared to 3 star AC.
6. How much power consumption per hour is used by an inverter AC of 1.5 tons?
Ans- A power consumption of 1.5 ton inverter AC per hour can decrease to 0.8- 1.3 units, once the room temperature stabilises.
7. Is a 3 Star inverter AC with 1.5 Ton Power consumption per hour efficient?
Ans- Yes. A 3 Star rating inverter AC with 1.5 ton power consumption per hour will be efficient compared to a non-inverter AC of the same rating.
8. How much will an AC unit using 1.5 tons consume per hour?
Ans- 1.5 ton air conditioner unit consumption ranging per hour normally lies between 1 and 1.5 units.
9. What is the current consumption of a 1.5-ton AC?
Ans- The required AC current will be in the range of 6 to 8 amps, assuming the voltage supply rating is standard, i.e., 230
10. How much is 1.5 ton split AC energy consumption per month?
Ans- As the daily usage of 8 hours results, the energy consumption of 1.5 ton split AC units can go up to 280-320 units per month, depending on their efficiency.
11. How much does a 1.5 ton AC consume in 1 hour?
Ans: 1.2–1.8 units/hr depending on star rating
12. What is the wattage of a 1.5 ton AC?
Ans: 1,200–1,800 watts (1.2–1.8 kW)
13. How much current does a 1.5 ton AC consume?
Ans: 5 – 8 amps at 230V depending on model.
14. 3-star vs 5-star: power consumption difference?
Ans: 3-star: 1.5–1.7 units/hr; 5-star: 1.2–1.35 units/hr
15. How many units does a 1.5 ton AC use in 8 hours?
Ans: 5-star: 9.6–10.8 units; 3-star: 12–13.6 units
16. Monthly electricity bill for 1.5 ton AC?
Ans: Monthly electricity bill for 1.5 ton AC? ₹1,500–₹3,600 depending on usage and star rating
17. Inverter vs non-inverter: which consumes less?
Ans: Inverter: 0.8–1.3 units/hr; Non-inverter: 1.5–1.8 units/hr
