1.5 Ton Dedicated Energy Model • Inverter & Split Presets

1.5 Ton AC Power Consumption & Bill

Accurately calculate electricity consumption in units (kWh) and electric bills for 1.5 Ton split & inverter air conditioners for 1 hour, 8 hours, and monthly runtimes.

AC Tonnage / Capacity *For ~130–180 sq ft room

AC Type & Energy Efficiency

Thermostat Setpoint / LoadRecommended: 24°C (75°F)

Daily Runtime8 hrs/day

Days Active per Month

Currency

Electricity Rate per kWh / Unit

$/kWh

Estimated Bill & Power

100% Client-Side

Cost for 1 Hour AC

—

Daily Cost (8 hrs)

—

Monthly AC Bill—

Estimated Energy Cost—

4-Month Summer Season

—

Efficiency Insight: Running at 24°C instead of 18°C saves up to — on your monthly bill without sacrificing comfort.

⚡Quick Answer • 1.5 Ton AC Power Consumption

How much power does a 1.5 Ton AC use per hour?

A standard 1.5 Ton inverter split AC consumes between 0.8 and 1.2 units (kWh) per hour under normal conditions at 24°C. Older or non-inverter models draw around 1.5 to 1.8 units per hour. At an average electricity rate of $0.16/kWh, running a 1.5 Ton AC costs approximately $0.13 to $0.19 per hour.

1 Hour Runtime (24°C):0.8 – 1.2 Units (kWh)

8 Hours / Day (US $0.16):$1.02 – $1.54 / day

Monthly Bill (8 hrs/day):$30.60 – $46.20 / mo

Looking for other AC capacities?Compare all tonnage ratings:

1 Ton AC Guide →|All Tonnages Calculator →

Efficiency Benchmark

1.5 Ton AC Power Consumption: 3-Star vs. 5-Star Inverter

Because 1.5 Ton (18,000 BTU/hr) is the most widely installed air conditioner capacity for living rooms (130–180 sq ft), selecting between a 3-Star and a 5-Star inverter unit has a direct impact on your summer electricity bill.

AC Technology & Star Rating	Average Steady Draw	Units in 1 Hour	Units in 8 Hours	Monthly Bill (US $0.16)	Monthly Bill (India ₹7.5)
5-Star Inverter Split AC	~800W – 950W	0.80 – 0.95 kWh	6.4 – 7.6 kWh	$30.70 – $36.50	₹1,440 – ₹1,710
3-Star Inverter Split AC	~1,050W – 1,200W	1.05 – 1.20 kWh	8.4 – 9.6 kWh	$40.30 – $46.10	₹1,890 – ₹2,160
Standard Non-Inverter (Fixed Speed)	~1,450W – 1,600W	1.45 – 1.60 kWh	11.6 – 12.8 kWh	$55.70 – $61.40	₹2,610 – ₹2,880
1.5 Ton Window AC	~1,550W – 1,750W	1.55 – 1.75 kWh	12.4 – 14.0 kWh	$59.50 – $67.20	₹2,790 – ₹3,150

1.5 Ton AC Electricity Consumption by Operating Hours

Estimated electricity consumption and billing cost for a 1.5 Ton 5-Star inverter AC running at a setpoint temperature of 24°C (0.85 kWh/hr average effective draw):

1 Hour / Day0.85 Units$4.08 / mo

4 Hours / Day3.40 Units$16.32 / mo

8 Hours / Day6.80 Units$32.64 / mo

12 Hours / Day10.20 Units$48.96 / mo

16 Hours / Day13.60 Units$65.28 / mo

24/7 Running20.40 Units$97.92 / mo

FAQ

Frequently Asked Questions: 1.5 Ton AC Power Consumption

How many units does a 1.5 Ton AC consume in 1 hour?

Under standard operating conditions at 24°C (75°F), a 1.5 Ton 5-Star Inverter AC consumes between 0.8 and 1.1 units (kWh) per hour once the room stabilizes. A 3-Star inverter AC consumes roughly 1.0 to 1.3 units per hour, while an older fixed-speed non-inverter model draws 1.4 to 1.8 units per hour.

How many units does a 1.5 Ton AC consume in 8 hours?

Operating a 1.5 Ton inverter AC for 8 hours daily consumes approximately 6.5 to 9.0 units (kWh) of electricity. At an average rate of $0.16 per unit in the US, 8 hours costs roughly $1.04 to $1.44. In India at ₹7.50 per unit, 8 hours costs approximately ₹49 to ₹68.

What is the monthly electricity bill for a 1.5 Ton AC?

For 8 hours of daily use over 30 days (240 hours total), a 1.5 Ton inverter AC consumes 195 to 270 units per month, resulting in an estimated monthly electric bill of $31 to $43 (or ₹1,460 to ₹2,025). Running 16 hours daily consumes 390 to 540 units monthly ($62 to $86 / ₹2,925 to ₹4,050).

How much power does a 5-Star 1.5 Ton AC save compared to a 3-Star AC?

A 5-Star inverter AC (ISEER 5.0+) consumes approximately 20% to 25% less electricity than a 3-Star inverter AC (ISEER 3.8–4.0). Over an entire summer season (8 hours daily for 120 days), a 5-Star model saves roughly 200 to 280 units (kWh), saving $32 to $45 or ₹1,500 to ₹2,100 annually.

Need to Calculate for Other Air Conditioners?

Explore our comprehensive collection of electrical calculation tools:

AC Electricity Cost CalculatorCompare 1 Ton to 2.5 Ton ACs 1 Ton AC Power ConsumptionBedroom cooling consumption General kWh CalculatorConvert Watts & Hours to kWh