How much electricity does a three-star AC consume when run continuously for 3 hours? Understand the full calculations.
- bySherya
- 21 Apr, 2026
3-Star AC Power Consumption: 3-star ACs are slightly cheaper and also save energy. Therefore, it's important to know how much your 3-hour usage bill will be.

3 Star AC Power Consumption: How much power will a 3 Star AC consume in 3 hours?
3 Star AC Power Consumption: The biggest concern of people while using AC is the electricity bill. If the AC has 5 star energy rating then it consumes the least power, whereas an AC with 1 star rating consumes more power. Most of the people in India buy 3 star rated AC. It is balanced in terms of price and performance. It consumes more power than 5 star, but less power than 1-2 star-rated AC. In such a situation, many people may have a question in their mind about how much power does a 3 star AC consumes in one hour of use. Today let us know the answer to this question.
How much will it cost to use a 3 star AC for 3 hours?
The power consumption of any AC depends on its capacity, how long it is used, the insulation of the room, and whether it is an inverter or non-inverter. All these factors can accurately determine the AC's power consumption. However, if we estimate, a 1-ton 3-star AC consumes 1-1.2 units of power per hour. Similarly, a 1.5-ton 3-star AC consumes 1.4-1.6 units, and a 2-ton 3-star AC consumes 1.9-2.2 units. If we use a 1-ton 3-star AC continuously for 3 hours, it will consume 3-3.6 units of electricity. If you are currently paying Rs. 8 per unit, then using this AC for 3 hours could cost you Rs. 24-28.
When should one buy a 3 star AC?
If you don't want to pay a lot upfront and use your AC for less than 6 hours per day, a 3-star AC may be the right choice. Furthermore, if your per-unit electricity costs are low and you only need to use your AC for a short period of time, a 3-star AC is also a good option.
What to do to save electricity?
- Close the room properly while running the AC.
- Keep the AC temperature set at 24.
- Keep getting your AC serviced on time.
- Do not keep any heat source in an AC room.
- To protect the room from getting heated by the sun, use thick curtains on doors and windows.





