How Much will the bill be if a 1.5 ton AC runs for 8 hours a day?
The monthly electricity bill for running a 1.5 ton AC for 8 hours a day depends on several factors:
Type of AC — Inverter vs non-inverter (inverter models save 30–50% power once room cools)
Star rating — 5-star is most efficient (lowest consumption), 3-star is average, older 1–2 star are higher Room size, insulation, outside temperature, set temperature (e.g., 24–26°C is efficient) Electricity tariff in your area
Realistic Power Consumption (India 2025–2026 data)
Non-inverter / fixed-speed 1.5 ton AC → ≈1.5–1.8 units (kWh) per hour
3-star inverter 1.5 ton AC → ≈1.2–1.5 units per hour (average)
5-star inverter 1.5 ton AC → ≈0.9–1.3 units per hour (average, can drop to 0.6–0.8 after cooling)
For 8 hours daily (typical summer night + evening usage):
Daily consumption (30 days/month assumed):
5-star inverter → 7–10 units/day → 210–300 units/month
3-star inverter → 9–12 units/day → 270–360 units/month
Non-inverter / older model → 12–14 units/day → 360–420 units/month
Monthly Bill Estimate
Approximate monthly bill (just for the AC, excluding other household usage):
AC TypeUnits/month (8 hrs/day)Bill at ₹8/unit (approx.)Realistic range (2026 India )5-star inverter210–300₹1,680 – ₹2,400₹1,600 – ₹2,7003-star inverter270–360₹2,160 – ₹2,880₹2,000 – ₹3,200Non-inverter / 2-star360–420₹2,880 – ₹3,360₹2,700 – ₹3,800