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.

Does a mobile charger consume electricity if left plugged in?

Yes, but very little — about 0.5W when plugged in without a phone. Over a year, this adds about 4 units (₹29). However, a laptop charger left plugged in draws 4W, costing ₹252/year. The bigger phantom loads are set-top boxes (15W) and WiFi routers (8W).

How much does a geyser cost to run per month?

A 2kW storage geyser running 1 hour/day consumes 60 units/month. At ₹8/unit, that's ₹480/month. In winter when usage increases to 2 hours/day, the cost doubles to ₹960/month. A heat pump water heater uses 75% less electricity — just 15 units/month for the same hot water output.

Which appliance uses the most electricity in an Indian home?

The air conditioner is by far the biggest electricity consumer — a 1.5-ton 3-star fixed-speed AC running 8 hours/day consumes 432 units/month. A 5-star inverter AC reduces this to 216–288 units/month. The refrigerator is second (running 24/7), followed by the geyser in winter months.

Can adding a geyser push me into a higher electricity slab?

Yes. If your baseline consumption is 250 units/month and you add a 2kW geyser running 1 hour/day (60 units), your total becomes 310 units. In Maharashtra, this moves you from the ₹8.20/unit slab to the ₹10.60/unit slab — increasing the rate on ALL 310 units, not just the extra 60.

Home Energy Audit · 202613 Appliances · Slab-Aware Math

Appliance Electricity Cost Calculator:
Complete Home Energy Audit.

Toggle your appliances, set daily usage hours, and see a real-time cost breakdown. Slab-aware math shows when adding a geyser or heater pushes you into a more expensive electricity tier.

13 AppliancesState-wise Slab RatesAC vs Rest TogglePhantom Load DetectorAnnual Projection

60–70%

AC share of home bill

432 units

3-star AC (8hr/day)

₹1,200+

Annual phantom load cost

50% less

5-star vs 3-star AC

Reviewed by Sulaiman Sekh — HVAC ExpertS.R EnterpriseHitachi Authorized

8+ years practical experience in AC / Plant Installation, Maintenance and Repair. HVAC Expert at S.R Enterprise under the authorized dealership of Hitachi. All data is verified against 2026 BEE Tariff Orders and manufacturer specifications.

Meet the full DU Tech Team →·Updated April 2026

Affiliate Disclosure: This page contains affiliate links. As an Amazon Associate, The DU Tech Team earns from qualifying purchases. Read our full disclosure →

Configure Your Appliances

Toggle appliances on/off · Drag sliders to set daily hours

Electricity rate:

Air Conditioner

King of Consumption

₹2,074

288 units/mo

8 hrs/day

Refrigerator

₹778

108 units/mo

24 hrs/dayAlways on

Water Geyser / Heater

Off

Washing Machine

Off

Microwave / OTG

Off

Ceiling Fan

₹194

27 units/mo

12 hrs/day

Television

₹86

12 units/mo

5 hrs/day

Water Purifier (RO)

Off

Laptop / Computer

Off

LED Lights (5 bulbs)

₹78

11 units/mo

8 hrs/day

Clothes Iron

Off

Mixer / Grinder

Off

Monthly Cost Breakdown

₹0

Total/month

Units/month

AC share

Enable appliances to see the chart

Cost Stack — Highest to Lowest

Annual Projection

₹0

Total annual cost

₹0

AC annual cost

How Much Does it Cost to Run a Geyser vs. an AC?

The comparison that surprises most Indian households

1.5T 5-Star Inverter AC

8 hrs/day

216 units/mo₹1,555/mo

Variable speed — actual consumption varies 900–1,400W

2kW Storage Geyser

1 hr/day

60 units/mo₹432/mo

Doubles in winter. Heat pump alternative uses 75% less.

Inverter Refrigerator

24 hrs/day

108 units/mo₹778/mo

Runs 24/7 but inverter compressor cycles efficiently.

Hidden Power Hogs: Phantom Loads

Appliances on standby silently drain electricity 24/7

"Phantom load" or "vampire power" is electricity consumed by devices when they're switched off but still plugged in. The average Indian household wastes ₹1,200–₹2,000/year on phantom loads alone.

Set-top Box

15W

standby draw

131 units/yr₹940/yr

WiFi Router

standby draw

70 units/yr₹504/yr

Microwave (standby)

standby draw

26 units/yr₹187/yr

TV (standby)

standby draw

9 units/yr₹65/yr

Mobile Charger (plugged in)

0.5W

standby draw

4 units/yr₹29/yr

Laptop Charger (plugged in)

standby draw

35 units/yr₹252/yr

Washing Machine (standby)

standby draw

18 units/yr₹130/yr

Fix: Use a smart power strip

A smart power strip with individual switches eliminates phantom loads from your entertainment setup. Estimated annual saving: ₹2,107 — enough to run your AC for an extra 2 weeks.

Understanding Wattage vs. Actual Consumption (kWh)

Wattage is the rate of consumption. kWh (units) = Watts × Hours ÷ 1000. A 2,000W geyser running 1 hour = 2 units.

Appliance

Wattage

Appliance Electricity Cost Calculator:Complete Home Energy Audit.

Configure Your Appliances

How Much Does it Cost to Run a Geyser vs. an AC?

Hidden Power Hogs: Phantom Loads

Understanding Wattage vs. Actual Consumption (kWh)

Appliance Electricity Cost Calculator:
Complete Home Energy Audit.