To calculate power consumption for a Air Conditioner (AC): Monthly Units (kWh) = (Wattage × Hours Used Per Day × 30 Days) ÷ 1,000. At an average Indian domestic rate of ₹7.00/unit, a standard 1500W Air Conditioner (AC) running 8 hours/day uses approximately 360.0 units/month costing ~₹2,520/month.
Calculate AC electricity bill in India. Free power consumption calculator for 1 Ton, 1.5 Ton, 2 Ton 3-Star & 5-Star inverter AC 1 hour, 8 hour & monthly cost.
| Usage Duration | Units Consumed (kWh) | Daily Cost (₹) | Est. Monthly Bill (₹) |
|---|---|---|---|
| 1 Hour | 1.2 kWh | ₹8.40 | ₹252 |
| 4 Hours | 4.8 kWh | ₹33.60 | ₹1,008 |
| 8 Hours (Overnight) | 9.6 kWh | ₹67.20 | ₹2,016 |
| 12 Hours | 14.4 kWh | ₹100.80 | ₹3,024 |
| 24 Hours (All Day) | 28.8 kWh | ₹201.60 | ₹6,048 |
Understanding how much power your air conditioner (ac) consumes is essential for controlling monthly household utility bills. In India, power rates vary between ₹3.00 and ₹11.00 per kWh unit depending on your state tariff slab tier.
Operating a air conditioner (ac) with high energy efficiency ratings (5-Star or Inverter technology) significantly lowers your overall unit consumption, keeping your meter within lower pricing slabs.
Example: 1500 Watts × 8 Hours × 30 Days ÷ 1000 = 360 kWh units per month.
Check the specification sticker on your air conditioner (ac) for rated wattage (e.g. 1500W).
Multiply wattage by operating hours per day and 30 days to get monthly Watt-hours, then divide by 1,000 for kWh units.
Multiply net monthly kWh units by your state electricity tariff slab rate (e.g. ₹7.00/unit) to find total monthly cost.
| Air Conditioner (AC) Specification / Variant | Wattage (W) | Daily Usage (Hrs) | Monthly Units (kWh) | Est. Monthly Bill (₹) |
|---|---|---|---|---|
| 1 Ton 5-Star Inverter AC | 850 W | 8 hrs/day | 204 kWh | ₹1428 |
| 1.5 Ton 5-Star Inverter AC | 1200 W | 8 hrs/day | 288 kWh | ₹2016 |
| 1.5 Ton 3-Star Non-Inverter AC | 1600 W | 8 hrs/day | 384 kWh | ₹2688 |
| 2 Ton 5-Star Inverter AC | 1700 W | 8 hrs/day | 408 kWh | ₹2856 |
| Appliance Energy Technology | Annual Units (kWh) | Est. Annual Electricity Bill (₹) | Energy Rating |
|---|---|---|---|
| 1.5 Ton 3-Star Non-Inverter | 1450 kWh/yr | ₹10,150 | Standard |
| 1.5 Ton 3-Star Inverter AC | 1180 kWh/yr | ₹8,260 | Good |
| 1.5 Ton 5-Star Inverter AC | 920 kWh/yr | ₹6,440 | Best (Saves ₹3,710/yr) |
A 1.5 Ton 5-Star Inverter AC consumes ~1.2 units (kWh) per hour. At an average Indian electricity tariff rate of ₹7/unit, running a 1.5 Ton AC for 1 hour costs approximately ₹8.40. A 3-Star non-inverter AC consumes ~1.6 units/hour, costing ~₹11.20 per hour.
Running a 1.5 Ton 5-Star Inverter AC overnight for 8 hours at 24°C consumes approximately 9.6 kWh units, costing between ₹65 and ₹75 per night (~₹2,000 monthly bill).
Yes, modern 5-Star inverter ACs are engineered for continuous 24/7 operation. Running a 1.5 Ton inverter AC for 12 hours at 24°C consumes about 14.4 units per day, resulting in a monthly bill of ~₹3,000.
No! Two standard 75W ceiling fans consume 150 Watts total, whereas a 1.5 Ton AC consumes 1,200 to 1,600 Watts. One 1.5 Ton AC uses as much electricity as 8 to 10 ceiling fans running simultaneously.
Formula: (AC Wattage in Watts × Daily Operating Hours × 30 Days ÷ 1000) × State Electricity Tariff Rate (₹/unit). Example: 1200W × 8 Hours × 30 ÷ 1000 = 288 units × ₹7 = ₹2,016 per month.
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Simple household adjustments can reduce your monthly power consumption and keep you in lower tariff slabs.
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Brushless DC (BLDC) motor fans consume only 28W compared to 75W for traditional ceiling fans, cutting fan power usage by over 60%.
Appliances in standby mode (TVs, set-top boxes, chargers) consume 5–10% idle electricity. Turn them off at the main switch.
Residential rooftop solar installations receive up to ₹78,000 in central subsidies, generating free green power with net-metering.
Clean refrigerator condenser coils annually and set geysers to 50°C with an auto-timer to prevent overheating and energy waste.
Energy-efficient 9W LED bulbs output the same light as 60W incandescent lamps while consuming 85% less electricity.
Consumed units (kWh) are split into progressive tariff tiers with respective unit rates.
Monthly fixed charges are calculated per kW (or kVA) of sanctioned load.
Fuel Adjustment Charges (FAC/FPPPA) and state electricity duty percentages are added.
State government zero-bill / free unit schemes (e.g. Gruha Jyothi, DERC) are deducted for the final estimate.
All calculations and reports on ElectricityBillcalc.com are estimated models computed according to published State Electricity Regulatory Commission (SERC) tariff schedules for FY 2025-26. Actual utility bills may include municipal taxes, meter rent, arrears, or power factor adjustments. Please verify against your official electricity board invoice.