How much electricity does a 1.5 ton AC consume per hour?

A 1.5 ton split AC consumes about 1.5 units (kWh) per hour for a 3-star non-inverter, around 1.3 units for a 5-star, and roughly 1.1 units per hour for a 5-star inverter model averaged over a cooling cycle. At ₹8 per unit, that is about ₹12, ₹10.4 and ₹8.8 per hour respectively. Actual consumption depends on room size, set temperature and outside heat.

How much does it cost to run a 1.5 ton AC for 8 hours a day?

A 1.5 ton 3-star AC running 8 hours a day uses about 12 units, costing roughly ₹96/day or ₹2,880/month at ₹8 per unit. A 5-star inverter model uses about 8.8 units, costing about ₹70/day or ₹2,112/month — saving around ₹770/month versus the 3-star.

Does an inverter AC really save electricity?

Yes. An inverter AC varies compressor speed instead of switching fully on and off, so once the room is cool it runs at low power. Over a season this cuts consumption by roughly 20–30% compared with a non-inverter AC of the same tonnage, which is why a 5-star inverter typically pays back its higher price in 2–3 summers of regular use.

How much electricity does a 1 ton AC use per month?

A 1 ton 3-star AC running 8 hours a day uses about 8 units/day, or roughly 240 units/month, costing about ₹1,920/month at ₹8 per unit. A 1 ton inverter AC uses about 6 units/day (180 units/month), costing around ₹1,440/month.

What is the difference between a 3-star and 5-star AC running cost?

A 5-star AC has a higher ISEER rating, so it delivers the same cooling using 10–20% less electricity than a 3-star of the same tonnage. For a 1.5 ton unit run 8 hours a day, that difference is roughly ₹400–800 per month. Over a 4-month summer the 5-star can save ₹1,500–3,000, and more if the AC runs longer.

How can I reduce my AC electricity bill?

Set the temperature to 24–26°C (every 1°C lower adds about 6% to consumption), clean filters monthly, use a fan to spread cool air, service the AC before summer, shade the outdoor unit, seal door and window gaps, and prefer a 5-star inverter model for any AC that runs more than a few hours a day.

❄️ Quick: pick your AC size

then set your hours & tariff below ↓

❄️ Cooling Cost

AC Electricity Cost Calculator

See exactly how many units your AC consumes and what it costs — per hour, per day and per month — for your tonnage, star rating and usage.

❄️ AC is usually the biggest jump in your summer bill. A single 1.5 ton AC run 8 hours a day can add ₹2,000–3,000 a month. Pick the right star rating and set temperature and you keep a big chunk of that.

AC Tonnage

1.5 ton suits most 120–160 sq ft rooms

Star Rating / Type

Inverter ACs run at variable speed and use less over a cooling cycle

Running Hours / Day

Days Used / Month

Electricity Tariff (₹ per unit)

Home tariff in India: ₹6–10/unit

Average Power (kW)

Auto-set from selection — edit from your AC's label if known

How This Calculator Works

It uses the average power your AC draws over a cooling cycle — not just the peak rating — so the figure matches your real bill more closely.

Tonnage sets the cooling capacity, and star rating / inverter sets how efficiently it delivers that cooling. A 5-star inverter does the same job using fewer units.

Know your exact wattage? Read the average power from the AC's energy label and type it into the Average Power box to override our estimate.

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How AC Electricity Consumption Is Calculated

An air conditioner's bill comes down to one thing: how many units (kWh) it draws while running, multiplied by your tariff. The trick is that an AC does not draw its peak power continuously — the compressor cycles off once the room is cool, and an inverter AC slows down instead of stopping. This calculator uses a realistic average power so the result is close to your actual bill.

Units per Hour (kWh) = Average Power (kW) Units per Day = Average Power × Running Hours Cost per Day (₹) = Units per Day × Tariff (₹/unit) Cost per Month (₹) = Cost per Day × Days Used

Worked Example — 1.5 Ton, 8 hrs/day

1.5 ton 3-star | Average power ≈ 1.5 kW | Hours: 8/day | Days: 30 | Tariff: ₹8/unit

Units per Day = 1.5 × 8 = 12 units
Cost per Day = 12 × ₹8 = ₹96/day
Cost per Month = ₹96 × 30 = ₹2,880/month
A 5-star inverter (≈1.1 kW) would cost about ₹2,112/month — saving ₹768/month.

How to Reduce Your AC Bill

Set temperature to 24–26°C — every 1°C lower adds roughly 6% to consumption
Clean filters monthly and service the AC before summer
Run a ceiling fan with the AC to spread cool air, so you can set a higher temperature
Seal gaps around doors and windows; close curtains during the day
Shade the outdoor unit and keep its airflow clear
For any AC running more than 3–4 hours a day, a 5-star inverter pays back its premium in 2–3 summers

AC Power Consumption & Monthly Cost Reference

Approximate monthly cost at 8 hours/day, 30 days, ₹8/unit. Average power shown in kW.

AC Size	3-Star	5-Star	Inverter (5★)
1 Ton	1.0 kW · ₹1,920	0.85 kW · ₹1,632	0.75 kW · ₹1,440
1.5 Ton	1.5 kW · ₹2,880	1.3 kW · ₹2,496	1.1 kW · ₹2,112
2 Ton	1.9 kW · ₹3,648	1.6 kW · ₹3,072	1.5 kW · ₹2,880

* Average running power including compressor cycling. Use the calculator above for your exact hours and tariff.

Frequently Asked Questions

About 1.5 units/hour for a 3-star non-inverter, ~1.3 units for a 5-star, and ~1.1 units/hour for a 5-star inverter averaged over a cooling cycle. At ₹8/unit that is roughly ₹12, ₹10.4 and ₹8.8 per hour. Real consumption varies with room size, set temperature and outside heat.

A 1.5 ton 3-star AC uses about 12 units, costing ₹96/day or ₹2,880/month at ₹8/unit. A 5-star inverter uses about 8.8 units, costing ₹70/day or ₹2,112/month — saving around ₹770/month.

Yes. An inverter AC varies compressor speed instead of switching fully on and off, so it runs at low power once the room is cool. Over a season this cuts consumption by roughly 20–30% versus a non-inverter of the same tonnage, so a 5-star inverter usually pays back its higher price in 2–3 summers of regular use.

A 1 ton 3-star AC running 8 hours/day uses about 8 units/day, roughly 240 units/month, costing ₹1,920/month at ₹8/unit. A 1 ton inverter AC uses about 6 units/day (180 units/month), costing around ₹1,440/month.

A 5-star AC uses 10–20% less electricity than a 3-star of the same tonnage. For a 1.5 ton unit run 8 hours/day that is about ₹400–800/month. Over a 4-month summer the 5-star saves ₹1,500–3,000, more if the AC runs longer.

Set temperature to 24–26°C (every 1°C lower adds ~6%), clean filters monthly, run a fan with the AC, service it before summer, shade the outdoor unit, seal door/window gaps, and choose a 5-star inverter for any AC running more than a few hours a day.

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