How much does a 1.5 ton AC cost per month in India?

A 1.5 ton 3-star AC costs approximately ₹2,520–₹3,600 per month running 8 hours daily, depending on your state electricity rate. A 5-star inverter model costs ₹1,728–₹2,508 per month — saving ₹800–₹1,100 monthly.

How much electricity does a 1.5 ton AC use per month?

A 1.5 ton 5-star inverter AC uses approximately 252–300 units (kWh) per month when run for 8 hours daily. A 3-star model uses 360–400 units per month. At ₹7 per unit, this costs ₹1,764–₹2,800 monthly.

Does inverter AC really save electricity?

Yes. Inverter ACs save 30–50% electricity compared to non-inverter (fixed-speed) models. The variable-speed compressor adjusts output based on room temperature, avoiding the constant on/off cycling that wastes power in fixed-speed units.

What is the best temperature to set AC to save electricity in India?

The Bureau of Energy Efficiency (BEE) recommends 24°C as the default AC temperature. Each degree below 24°C increases electricity consumption by 6–8%. Setting 24°C instead of 18°C can save up to 36% on your monthly AC electricity bill.

Which state has the cheapest electricity rate for AC in India?

As of 2026, Goa, Himachal Pradesh and Uttarakhand have among the lowest residential electricity rates in India (₹3.80–₹5.00 per unit). Maharashtra and Andhra Pradesh have among the highest rates at ₹8.50–₹12.40 per unit for higher consumption slabs.

Is a 5-star AC worth the extra cost in India?

Yes, for most Indian households. A 5-star inverter AC saves ₹800–₹1,200 per month versus a 3-star model. At ₹10,000–₹15,000 higher upfront cost, the payback period is typically 12–18 months, after which you enjoy net savings for the remaining 8–10 year AC lifespan.

What tonnage AC do I need for my room?

For rooms up to 120 sq ft: 1 ton AC. For 120–180 sq ft: 1.5 ton AC. For 180–240 sq ft: 2 ton AC. Adjust upward if the room is on the top floor, faces west, has large windows, or has more than 2 occupants. Use our free AC Tonnage Calculator for a precise recommendation.

How accurate is the AC bill calculator?

Our calculator uses BEE 2026 ISEER data, real state-wise DISCOM tariff slabs, inverter duty-cycle modelling, and outdoor temperature correction factors. This gives approximately 90–97% real-world accuracy — significantly more accurate than basic watt × hours × flat rate calculators.

Which AC is best for Kolkata?

The best AC for Kolkata depends on its Tropical Wet & Dry climate. Top pick: Hitachi RSB518HBEA. Value pick: LG RS-Q18YNZE. Must-have features include: Powerful dry mode; PM2.5 filter; Auto-clean; Strong dehumidification.

What tonnage AC do I need in Kolkata?

Add 15% for humidity load For most 120–150 sq ft rooms in Kolkata, a 1.5-ton AC is the standard choice.

How much does it cost to run an AC in Kolkata?

Running a 1.5-ton 5-star inverter AC for 11 hours/day in Kolkata costs approximately ₹2,703/month. A 3-star model costs ₹3,861/month.

Kolkata · West Bengal · tropical climate

Best AC for Kolkata
2026 Climate Guide

Don't buy the wrong AC for Kolkata's Tropical Wet & Dry climate. Expert picks, must-have features, and real monthly cost estimates at ₹7.8/unit.

Kolkata Climate Guide

Expert Picks 2026

₹7.8/unit rate

38°C peak summer

See Top Picks Calculate Cost in Kolkata

₹7.8

Per Unit

West Bengal tariff

38°C

Peak Summer

Tropical Wet & Dry

11h

Avg Usage

Daily peak season

₹13,896

Yearly Savings

5★ vs 3★ 1.5T

Kolkata Climate Profile

Kolkata combines high heat with extreme humidity. Pre-monsoon (April–June) is the most demanding period. ACs with strong dehumidification and auto-clean features perform best.

Climate: Tropical Wet & DryPeak Season: April – JuneAvg Usage: 11 hrs/dayElectricity Rate: ₹7.8/unit

Must-Have Features for Kolkata

Powerful dry mode

PM2.5 filter

Auto-clean

Strong dehumidification

Avoid in Kolkata

Models without dry mode

Low dehumidification capacity

Top Pick

Hitachi RSB518HBEA

Best overall choice for Kolkata's climate. Designed specifically for Tropical Wet & Dry conditions.

Value Pick

LG RS-Q18YNZE

Best bang-for-buck option for Kolkata residents who want reliable cooling without overspending.

Monthly AC Cost in Kolkata: 3-Star vs 5-Star

Tonnage

3-Star Cost

5-Star Cost

1.0T₹2,574₹1,802Save ₹772

1.2T₹3,089₹2,162Save ₹927

1.5T₹3,861₹2,703Save ₹1,158

2.0T₹5,148₹3,604Save ₹1,544

Based on 11 hrs/day · ₹7.8/unit (Kolkata) · Split AC

Expert Tip for Kolkata

Kolkata's monsoon humidity (90%+) makes the AC work harder than the temperature suggests. Dry mode is your most-used feature — prioritize it.

Tropical / High Humidity Climate Zone

90%+ humidity — dehumidification is your priority

Other cities in this zone:

GuwahatiBhubaneswarThiruvananthapuramPort BlairAgartala

Kolkata Quick Facts

StateWest Bengal

ClimateTropical Wet & Dry

Peak Temp38°C

Peak SeasonApril – June

Avg AC Usage11 hrs/day

Electricity Rate₹7.8/unit

MaintenanceEvery 2 months

Top Saving Tip

Kolkata's humidity means your AC works harder. Clean filters every 2 weeks in summer — dirty filters increase consumption by up to 15%.

Tonnage Note

Add 15% for humidity load

Calculate Your Tonnage →

Kolkata Calculators

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Best AC for Kolkata2026 Climate Guide