A 1.5 ton inverter air conditioner is commonly used in medium-sized rooms such as living rooms and master bedrooms. Inverter ACs are more energy-efficient than traditional fixed-speed ACs because their compressor runs continuously at variable speeds to maintain the desired temperature — reducing power spikes and energy waste.
However, the actual electricity cost of running a 1.5 ton inverter AC depends on:
- The power consumption of the AC (in units per hour),
- How many hours it runs each day,
- Your electricity tariff (₹ per unit),
- Room size, insulation, and usage pattern.
How Much Power Does a 1.5 Ton Inverter AC Use?
Unlike non-inverter ACs that operate at full power until they switch off, inverter ACs adjust their power based on cooling needs.
Typical input power for a 1.5 ton inverter AC:
- At peak load: 1.2–1.5 kW (units per hour)
- During stable cooling: 0.8–1.1 kW
On average, a 1.5 ton inverter AC consumes around 0.9–1.1 units per hour (kWh) under normal conditions.
Note: 1 unit of electricity = 1 kilowatt-hour (kWh)
How to Calculate Daily and Monthly Electricity Cost
Step-by-Step Method
Let’s assume:
- AC power draw = 1.0 units/hour
- Daily usage = 8 hours
- Electricity tariff = ₹8 per unit
Daily Consumption
1.0 units/hour × 8 hours = 8 units/day
Daily Cost
8 units × ₹8 = ₹64 per day
Monthly Cost (30 days)
₹64 × 30 = ₹1,920 per month
So, if you run the AC for around 8 hours every day, the approximate electricity cost would be ₹1,800 — ₹2,200 per month, depending on your real usage and local tariff.
Electricity Cost at Different Usage Patterns
Daily AC UsageApprox. Daily Units (kWh)Approx. Monthly Cost (₹8/unit)4 hours/day4 units₹3206 hours/day6 units₹4808 hours/day8 units₹64010 hours/day10 units₹800
This shows that longer usage increases the bill proportionately.
Inverter AC vs Non-Inverter AC Cost Comparison
AC TypeMonthly Cost (8 hrs/day)1.5 ton Inverter AC₹1,800 — ₹2,2001.5 ton Non-Inverter AC₹2,400 — ₹3,000+
Inverter ACs are typically 20–30% more energy efficient than non-inverter models — especially with longer daily use.
Factors That Affect Electricity Cost
Star Rating
Higher BEE star ratings (4★ vs. 5★) mean better efficiency and lower consumption.
Thermostat Setting
Keeping temperatures around 24–26 °C saves energy. Every 1 °C drop can increase consumption by ~6–8%.
Room Insulation
Better insulation (curtains, sealed gaps) means less cooling load and lower costs.
Outdoor Temperature
Hotter climates increase compressor workload and electricity use.
Usage Duration
Longer AC run time results in higher bills — though inverter ACs are more efficient for extended use.
Smart Tips to Reduce AC Electricity Cost
✔ Use “Sleep” or “Eco” mode during night
✔ Seal doors and windows to prevent cold air loss
✔ Keep filters clean for efficient airflow
✔ Combine with ceiling fans for better circulation
✔ Avoid extreme temperature settings
Implementing simple habits can cut your AC electricity cost noticeably without compromising comfort.
Final Verdict
The electricity cost of running a 1.5 ton inverter AC in India typically ranges from about:
₹1,500 to ₹2,500 per month
(with 6–10 hours of daily use at ~₹8 per unit)
This can vary slightly based on your tariff, usage habits, insulation, room size, and AC star rating.
If you want a precise estimate for your exact location and usage pattern, let me know your tariff (₹/unit) and daily hours — and I can calculate it for you!
