Instantly calculate your AC's monthly electricity bill—simply enter your AC type, tonnage, star rating, and electricity rate to get an exact bill estimate. Plus, get smart tips to save money!
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Approx. average domestic tariff — check your DISCOM bill for exact rate
| State | Avg Rate (₹/unit) |
|---|---|
| Delhi | ₹3 – ₹8 |
| Maharashtra | ₹4 – ₹12 |
| Karnataka | ₹5 – ₹8 |
| Tamil Nadu | ₹4.5 – ₹7.5 |
| Uttar Pradesh | ₹5.5 – ₹7.5 |
| Rajasthan | ₹6 – ₹9 |
| Gujarat | ₹5 – ₹7 |
| Telangana | ₹5 – ₹9.5 |
| West Bengal | ₹5 – ₹8 |
| Punjab | ₹5 – ₹7 |
| Madhya Pradesh | ₹5.5 – ₹8 |
| Kerala | ₹4.5 – ₹7 |
| Haryana | ₹5 – ₹8 |
| Bihar | ₹6 – ₹8 |
Accurate calculations based on BEE-certified power ratings and real-world performance data.
We use BEE star-rating adjusted wattage for Window, Split, and Inverter ACs across 1, 1.5, and 2-ton capacities.
Monthly Bill = (Watts ÷ 1000) × Hours/day × Days × Electricity Rate (₹/kWh)
Results are compared against a baseline 1-star Window AC so you can see real savings from your current setup.
Each additional star reduces power consumption by 8–12%. A 5-star AC uses ~30% less electricity than a 1-star model.
Inverter ACs vary speed to maintain temperature, saving 30–50% more energy than fixed-speed non-inverter models.
Based on your bill amount, our engine suggests personalized energy-saving measures with estimated savings.
Estimated monthly units (kWh) for 8 hrs/day, 30 days usage
| AC Type | Capacity | Star Rating | Wattage (W) | Monthly Units | Bill @ ₹6/unit |
|---|---|---|---|---|---|
| Window | 1.5 Ton | 1 Star | 1700W | 408 kWh | ₹2,448 |
| Window | 1.5 Ton | 3 Star | 1400W | 336 kWh | ₹2,016 |
| Split | 1.5 Ton | 3 Star | 1280W | 307 kWh | ₹1,843 |
| Split | 1.5 Ton | 5 Star | 1020W | 245 kWh | ₹1,469 |
| Inverter | 1.5 Ton | 3 Star | 1050W | 252 kWh | ₹1,512 |
| Inverter | 1.5 Ton | 5 Star | 850W | 204 kWh | ₹1,224 |
| Inverter | 1 Ton | 5 Star | 580W | 139 kWh | ₹835 |
| Inverter | 2 Ton | 5 Star | 1120W | 269 kWh | ₹1,613 |
Curated picks for maximum efficiency and minimum bills. Prices updated regularly.
* Prices are approximate. We earn a small commission if you buy via our links — at no extra cost to you. Read disclaimer.
Summer has arrived, and running the AC has become a necessity—but seeing that monthly electricity bill gives you a headache, right? 🤯 You're not alone. In India, 40–60% of a household's electricity bill is driven solely by AC usage during the peak summer months (April–July). That is exactly why we built this free AC bill calculator —so you can know in advance how much your AC will cost you and make smart decisions accordingly.
First off, a direct answer: If you run a 1.5-ton, 5-star inverter AC for 8 hours daily, your monthly bill will come to approximately ₹1,200 – ₹1,500 (at a rate of ₹6 per unit). However, if you have an older 1.5-ton, 3-star window AC, that bill could climb to between ₹2,000 and ₹2,500. Do you see the difference? A good inverter AC can literally save you ₹800–₹1,000 every single month.
However, these numbers depend on several factors:
Calculating your AC bill is easy. Energy experts use this formula:
Monthly Bill (₹) = (AC Wattage ÷ 1000) × Hours/day × Days × ₹ per unit
Real Example: Suppose you have a 1.5-ton, 5-star inverter AC (850 Watts) that you run for 8 hours daily over 30 days, and the electricity rate is ₹6 per unit:
(850 ÷ 1000) × 8 × 30 × 6 = ₹1,224/month 💡
Don't want to do the math yourself? No problem—use our AC bill calculator above to get the exact answer in just 10 seconds!
Many people think that Inverter ACs are just a marketing gimmick—but that isn't true. In an Inverter AC, the compressor operates at a variable speed; this means that once the room cools down, it automatically slows down and consumes less electricity. In a Non-Inverter AC, the compressor constantly switches on and off, which results in greater energy wastage.
Real savings comparison (1.5 ton, 8 hrs/day, 30 days, ₹6/unit):
Over the course of a year, this amounts to a saving of ₹9,500+. The extra cost of an Inverter AC is recovered within 2–3 years; after that, you are in pure profit! 💰
The Bureau of Energy Efficiency (BEE) assigns a star rating of 1 to 5 to every AC unit, based on its ISEER (Indian Seasonal Energy Efficiency Ratio). Simple rule: The more stars, the lower the bill.
Practical example: If the monthly bill for a 1-star AC is ₹2,448, the bill for a 5-star inverter of the same capacity would be just ₹1,224. A direct saving of ₹1,224 every month!
Electricity rates in India vary from state to state because each state has its own DISCOM (Distribution Company). Rates are slab-based — meaning the more electricity you consume, the higher the per-unit rate charged. Approximate domestic rates for 2026:
💡 Pro Tip: Check your latest electricity bill to find out your exact rate — the per-unit charges are clearly mentioned on it.
Follow these tips and reduce your AC bill by 30–40%:
The brand also makes a difference, as every brand utilizes a different compressor technology. Here are some of the most efficient Ac brands in India for 2026:
Looking for something within budget? Voltas, Lloyd (Havells), And Godrej are good value-for-money options that offer decent efficiency.
To know your AC brand's exact power consumption, use our calculator — it has 25+ Indian brands available.
Most Frequently Asked Questions About Electricity Consumption, Bill Calculation, and Energy Saving in India.
The monthly power consumption of a 1.5-ton AC depends on its type and star rating. A 3-star split AC running 8 hours a day consumes approximately 307 kWh per month, costing ₹1,843 at ₹6 per unit. A 5-star inverter AC consumes only 204 kWh, costing just ₹1,224. To determine your exact figures, please use our calculator above.
If a 1.5-ton 5-star inverter AC is operated for 8 hours daily, it consumes approximately 6.8 units (kWh) per day. At ₹6 per unit, this amounts to ₹41 per day. For a non-inverter 3-star split AC, this figure would be 10.2 units = ₹61/day. A window AC consumes even more—approximately ₹67–80/day.
Formula: Monthly Bill = (AC Wattage ÷ 1000) × Daily Hours × Days × Electricity Rate (₹/unit). Example: 1.5 ton 5-star inverter (850W) × 8 hrs × 30 days × ₹6/unit = ₹1,224/month. Our AC bill calculator does this calculation automatically with BEE-certified wattage data for 25+ AC brands.
An Inverter AC is 30–50% more energy-efficient than a non-inverter model. The inverter compressor operates at a variable speed—slowing down once the room has cooled sufficiently. A non-inverter unit, on the other hand, constantly switches on and off, which consumes more electricity. A 1.5-ton, 5-star inverter AC can save ₹6,000–₹15,000 annually compared to a non-inverter model. While the initial cost is higher, it is recovered within 1–2 years.
The cost of running an AC all night (approximately 8–10 hours): For a 1.5-ton, 5-star inverter AC, it is ₹41–₹51 per night (at a rate of ₹6 per unit). If you have a non-inverter, 3-star split AC, the cost is ₹61–₹77 per night. Pro tip: Use Sleep Mode or the timer function—the AC will auto-shut off after 2–3 hours, resulting in a 20–30% saving during the night.
The BEE recommends 24°C as the ideal temperature for both comfort and efficiency. Every 1°C increase results in approximately 6% electricity savings. If you operate the unit at 26°C instead of 18°C, you can achieve savings of up to 48%! If you run a ceiling fan alongside it, even 26°C feels comfortable.
It is absolutely worth it! The upfront cost of a 5-star inverter AC is ₹5,000–₹10,000 higher, but it saves ₹6,000–₹15,000 annually on electricity bills compared to a 3-star non-inverter model. The ROI is typically realized within 1–2 years. If you run your AC for 6+ hours daily, a 5-star inverter is the best long-term investment.
The most efficient AC brands in 2026 are: Mitsubishi (10% less than average), O General (9% less), Daikin (8% less), Panasonic (7% less), and LG & Hitachi (6% less). In the budget segment, Midea and Whirlpool offer good efficiency. Our calculator contains precise data for over 25 brands—select your brand to check.
The wattage of a 1.5-ton AC depends on its type and star rating: Window AC: 1150W (5-star) to 1700W (1-star). Split AC: 1020W (5-star) to 1600W (1-star). Inverter AC: 850W (5-star) to 1300W (1-star). This means a 5-star inverter AC consumes almost half the electricity compared to a 1-star window AC!
1 ton 5-star inverter AC uses about 580W versus 850W for 1.5 ton — a 32% difference. 8 hrs/day usage at ₹6/unit par: 1 ton = ₹835/month vs 1.5 ton = ₹1,224/month. Choose according to room size: 1 ton for rooms under 120 sqft; 1.5 ton for 120–180 sqft rooms. Galat tonnage AC consumes more electricity hey!
Monthly consumption of a 2-ton AC (8 hrs/day, 30 days): 5-star Inverter: 269 kWh = ₹1,613/month. 3-star Split: 403 kWh = ₹2,419/month. 1-star Window: 528 kWh = ₹3,168/month. A 2-ton AC is recommended only for rooms larger than 180 sq. ft. — installing it in a smaller room will result in wasted money.
It makes a huge difference! At 18°C, the AC has to work much harder, and the compressor runs at almost full speed. At 26°C, the compressor slows down (especially in inverter ACs). The difference: approximately 48% less electricity consumption at 26°C compared to 18°C. If the electricity bill comes to ₹2,000 at 18°C, it will be only ~₹1,040 at 26°C. If you run a fan alongside it, 26°C is also quite comfortable.
Yes, easily by 30–40%! Follow these steps:
Smart ACs do not save electricity directly—savings are achieved through their efficiency star ratings and inverter technology. However, smart features do help: you can switch the AC on or off using your phone (handy if you forgot to turn it off with the remote), usage tracking lets you monitor exactly how much energy is being consumed, and scheduling allows you to set automatic on/off timers. Overall, smart usage can lead to an additional 5–10% in savings.
In India, running a 1.5-ton AC for 8 hours a day results in a monthly bill increase of ₹1,200–₹2,500, depending on the AC type, star rating, and local tariff. During the summer months (April–June), bills can jump to between ₹2,000 and ₹4,000 if there are multiple ACs in the home. Use our calculator to get an estimate in advance.
Correct tonnage is very important—an incorrectly sized AC runs inefficiently and consumes more electricity. Here's a guideline: 0.8 Ton: Up to 80 sqft (small bedroom). 1 Ton: 80–120 sqft (standard bedroom). 1.5 Ton: 120–180 sqft (master bedroom/living room). 2 Ton: 180–240 sqft (large hall). For top-floor rooms or those with direct sunlight, it is recommended to choose one size larger tonnage.
Expert guides to help you reduce your electricity bill this summer.
Practical, tested tips that actually work — from temperature settings to maintenance schedules.
Read More →We compare energy consumption, features, and value across 15 top-rated 5-star ACs in 2026.
Read More →A detailed cost analysis showing 5-year total cost of ownership for both AC types.
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