Home Appliance Calculators AC Electricity Bill Calculator

How to Calculate Your AC Electricity Bill — Quick Answer

Three things decide your AC electricity bill: how big your AC is (tonnage), how efficient it is (BEE star rating), and how long you run it each day. A 1.5 ton 3-star inverter AC running 8 hours a day costs roughly ₹2,100–₹2,500 per month at ₹7/unit. Switch to a 5-star model and that drops to around ₹1,400–₹1,600/month — the same cooling for nearly 40% less money.

AC Monthly Bill = AC Power (kW) × Daily Hours × 30 days × ₹/unit
AC Power (kW) = Capacity (tons) × 1.167 × (1 / EER) × Load Factor

Example: 1.5 ton 3-star inverter AC running 8 hrs/day at ₹7/unit. Power = (1.5 × 3.517) ÷ 4.70 × 0.72 = 0.808 kW. Monthly bill = 0.808 × 8 × 30 × 7 = ₹1,362/month. Or just use the calculator above — it handles all of this instantly.

AC Electricity Bill Calculator

Enter your AC details below and get an instant bill estimate

If you run the AC more than 6 hours a day, an inverter model saves 20–40% on your bill compared to a non-inverter.
3-star: ISEER 3.50–3.99 · Good efficiency, popular mid-range choice
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1hrNight use ~8h24hr
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₹ / kWh
Check your last electricity bill for the per-unit rate. Most Indian homes pay between ₹6 and ₹8 per unit.
Quick State Rate Presets

Add all the ACs in your household to calculate your total monthly AC electricity bill.

₹ / kWh

Compare electricity cost of the same AC at different star ratings — see how much you save by upgrading.

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Your AC Bill Breakdown

Your full AC bill breakdown

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Fill in your AC details to see the cost
Select your AC's tonnage, star rating, and daily usage. Enter your electricity rate and hit Calculate — your full breakdown appears instantly.
💡 Did you know?
Most people are surprised to find their AC adds ₹2,000–₹4,000 to their monthly electricity bill. A 5-star 1.5 ton inverter AC costs up to ₹18,000 less per year to run than an old 1-star model — a saving that typically pays back the price premium within one cooling season.
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📊 Advanced AC Bill Analysis

Monthly Cost at Different Usage

Bill at 4, 6, 8, 10, 12, 16 hours/day

Cost by Star Rating

Compare 1★ to 5★ at your current usage

Annual Cost vs Upgrade Savings

Savings from upgrading to 4★ and 5★ over 10 years

💚 Savings by Upgrading Star Rating

These figures are estimates based on BEE 2026 ISEER norms. Your actual bill will vary depending on your thermostat setting, room insulation, how hot it is outside, and how well-maintained your AC is. For the official energy data on your specific AC model, check beestarlabel.com.

AC Electricity Bill per Month — All Capacities & Star Ratings (India 2026)

Use this table to quickly look up your expected monthly bill. All figures assume 8 hours of use per day, 30 days a month, at ₹7 per unit — the typical rate for most Indian households. Based on BEE 2026 ISEER norms.

Split Inverter AC — Monthly Electricity Bill

AC Capacity1 ★ (~₹)2 ★ (~₹)3 ★ (~₹)4 ★ (~₹)5 ★ (~₹)
0.75 Ton₹1,411₹1,270₹940
1.0 Ton₹1,882₹1,693₹1,254
1.5 Ton₹2,822₹2,540₹1,881
2.0 Ton₹3,763₹3,386₹2,509
2.5 Ton₹4,704₹4,233₹3,136
A 1.5 ton 5-star inverter AC costs about ₹940 less per month than a 1-star non-inverter model. That adds up to over ₹1.1 lakh in savings over 10 years — more than enough to cover the higher upfront price of a 5-star AC.

Non-Inverter (Fixed Speed) AC — Monthly Electricity Bill

AC Capacity1 ★ (~₹)2 ★ (~₹)3 ★ (~₹)4 ★ (~₹)5 ★ (~₹)
0.75 Ton₹1,750₹1,560₹1,176
1.0 Ton₹2,333₹2,080₹1,568
1.5 Ton₹3,499₹3,120₹2,352
2.0 Ton₹4,666₹4,160₹3,136

How Many Units Does Your AC Use Per Hour? (kWh Reference Table)

This table shows how many electricity units (kWh) your AC consumes every hour it runs. Multiply by your daily hours to get your per-day consumption, then by 30 for a monthly estimate.

AC Model1 ★2 ★3 ★4 ★5 ★
1 Ton Inverter Split0.897 kWh0.807 kWh0.732 kWh0.672 kWh0.598 kWh
1.5 Ton Inverter Split1.344 kWh1.210 kWh1.097 kWh1.008 kWh0.897 kWh
2 Ton Inverter Split1.792 kWh1.613 kWh1.463 kWh1.344 kWh1.196 kWh
1 Ton Non-Inverter1.111 kWh0.990 kWh0.896 kWh0.816 kWh0.747 kWh
1.5 Ton Non-Inverter1.667 kWh1.486 kWh1.344 kWh1.224 kWh1.120 kWh
2 Ton Non-Inverter2.222 kWh1.981 kWh1.793 kWh1.632 kWh1.493 kWh

Figures based on BEE 2026 ISEER mid-band values. Inverter ACs use a 0.72 average duty cycle factor, which reflects how they modulate compressor speed in real conditions — not peak-rated wattage.

Why This Calculator Gives You More Accurate Results

Most online AC calculators use outdated ISEER figures or assume full-load operation. Here's what makes this one different.

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Updated for BEE 2026

BEE revised its star rating thresholds in January 2026. We updated our entire dataset to match. If you're using an older calculator, it's likely still running on 2022 ISEER values — which means the numbers are off for any AC bought in the last year.

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Inverter ACs Are Modelled Correctly

Inverter ACs don't run at full power all the time — they speed down once the room is cool. Most calculators ignore this. Ours uses a real-world duty cycle factor, so the bill estimate reflects what you actually see on your meter.

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Works for the Whole House

Most homes have more than one AC. Switch to the Multi-AC tab to add all your units — bedroom, living room, office — and see your total household AC bill in one place.

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Should You Buy a 5-Star AC?

The Compare tab shows you exactly how much you save each month by moving to a higher star rating — and how long it takes for that saving to cover the price difference. Useful before buying a new AC.

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Carbon Footprint Included

Your results include the estimated CO₂ your AC is responsible for each month, based on India's grid emission factor of 0.82 kg per kWh. It's a small addition, but useful if you're thinking about energy consumption beyond just the bill.

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Visual Breakdown You Can Actually Read

After calculating, you get three charts: how your bill changes with usage hours, a side-by-side comparison of all star ratings at your current usage, and a 10-year savings projection if you upgrade. You can share your results directly from the page.

8 Practical Ways to Cut Your AC Electricity Bill

Small changes in how you use your AC can make a real difference to your bill. Here are eight that actually work.

Tip 01

Keep It at 24°C

This one change can reduce your AC bill by 15–24%. Every degree you drop below 24°C adds roughly 6% to your consumption. At 20°C you're spending a quarter more on electricity than you need to. BEE officially recommends 24°C for comfortable cooling.

Tip 02

Buy an Inverter AC

If you're still running a fixed-speed AC, switching to an inverter model can cut your AC electricity cost by 20–40%. The compressor slows down instead of switching off completely, which means smoother temperatures and much lower consumption. Most people recover the price difference in 1–2 summers.

Tip 03

Run a Fan Alongside the AC

A ceiling fan on medium speed circulates the cool air so the room feels 2–3°C colder than it actually is. That means you can raise your thermostat to 26–27°C and still feel comfortable — saving around 12–20% on your AC bill without any reduction in comfort.

Tip 04

Clean the Filters Every Month

A dirty filter blocks airflow and forces the compressor to run harder. In peak summer, check your AC filters every 3–4 weeks. It takes 5 minutes to rinse them under running water, and it keeps your AC running 10–15% more efficiently.

Tip 05

Use Sleep Mode at Night

Most ACs have a sleep mode that gradually raises the temperature by half a degree every hour after you fall asleep — you won't notice the difference, but it cuts overnight power consumption by 15–20%. If you run the AC through the night, this is one of the easiest savings available.

Tip 06

Block Out Heat Before It Enters

The gap under your door, a west-facing window, or poor wall insulation can add 20–30% to your AC's workload. Close the room properly before switching on the AC, draw the curtains on the sunny side, and consider a door-bottom seal (costs ₹200–₹400). Simple fixes, real savings.

Tip 07

Service It Before Summer Starts

An AC that hasn't been serviced in a year often has low refrigerant levels, dirty coils, or a partially blocked drain — all of which make it work harder. A basic annual service (₹500–₹1,500) typically brings consumption down by 10–15% and extends the unit's life.

Tip 08

Make Sure the Tonnage Fits Your Room

An AC that's too large for the room will cool it quickly and then keep switching on and off — short cycling wastes energy and reduces dehumidification. An undersized AC runs continuously at full load. The Room Size tab in the calculator above helps you find the right tonnage for your specific room.

Common Questions About AC Electricity Bills in India

Answers to the questions we get asked most often about running costs, star ratings, and getting the best out of your AC.

It depends on the star rating. A 5-star inverter 1.5 ton AC uses around 0.90 kWh per hour, a 3-star inverter uses about 1.10 kWh/hr, and a 1-star non-inverter model uses roughly 1.67 kWh/hr. At ₹7 per unit and 8 hours a day, that works out to ₹50/day for a 5-star AC and nearly ₹94/day for a 1-star — the difference over a month is over ₹1,300.
At ₹7 per unit and 8 hours of daily use, a 1.5 ton 3-star inverter AC will add roughly ₹1,850–₹2,300 to your monthly bill. A 3-star non-inverter of the same capacity runs closer to ₹2,300–₹2,900. These figures shift with your state's electricity rate — Maharashtra pays less than Karnataka, for instance. Use the calculator above to enter your exact rate for a more accurate number.
For most Indian households that use the AC for 5–6 months a year, yes — it pays for itself fairly quickly. A 5-star 1.5 ton inverter AC typically saves ₹10,000–₹15,000 a year on electricity compared to a 1-star model. The price difference between the two is usually ₹8,000–₹15,000, which means you break even within one or two cooling seasons. Over 10 years, the total saving can cross ₹1 lakh.
Yes, generally. A window AC at the same tonnage and star rating usually consumes 10–15% more electricity than a split AC, partly because window units use older compressor designs. That said, a new 5-star window AC will still outperform an old 2-star split AC. If you're buying new, a split inverter AC will give you the best efficiency — but a 5-star window AC is a perfectly reasonable choice for smaller rooms or tight budgets.
For 8 hours of operation: a 5-star 1.5 ton inverter AC uses roughly 7–7.5 units, a 3-star inverter uses about 8.5–9 units, and a 1-star non-inverter can use 13–14 units. At ₹7 per unit, that's the difference between ₹50 and ₹95 a day. The Room Size tab in the calculator also adjusts for how hard your AC has to work based on your room's insulation and orientation.
ISEER stands for Indian Seasonal Energy Efficiency Ratio. It measures how much cooling your AC delivers for every unit of electricity it consumes — across India's full range of seasonal temperatures, not just at one fixed test point. A higher ISEER means lower running costs. Under BEE 2026 norms, a 5-star inverter AC needs an ISEER of at least 5.60. For non-inverter ACs, the older EER (Energy Efficiency Ratio) rating is used instead.

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