Your AC Usage
Monthly Bill Breakdown
The monthly cost shown is for the AC alone, not your entire electricity bill. Add this to your other appliances to understand the AC's share. In most households that use AC actively during summer, the AC accounts for 50 to 70% of the total summer electricity bill.
| AC Size & Rating | USA ($0.15/kWh) | UK (£0.27/kWh) | India (₹8/kWh) | Australia (AU$0.29/kWh) |
|---|---|---|---|---|
| 1 ton 5-star inverter | $29 | £52 | ₹1,536 | AU$56 |
| 1.5 ton 5-star inverter | $36 | £65 | ₹1,920 | AU$70 |
| 1.5 ton 3-star inverter | $45 | £81 | ₹2,400 | AU$87 |
| 1.5 ton non-inverter | $58 | £104 | ₹3,072 | AU$112 |
| 2 ton 5-star inverter | $47 | £85 | ₹2,520 | AU$91 |
| 2 ton 3-star inverter | $60 | £108 | ₹3,240 | AU$117 |
The bill is directly proportional to both hours per day and days per month. Running the AC 10 hours instead of 8 hours (25% more) increases the bill by exactly 25%. Running it 25 days instead of 30 (17% fewer days) reduces the bill by 17%. Use the calculator to model your actual usage pattern for a realistic estimate.
The most common over-estimate comes from assuming 30 days × 8 hours in a month where you are only home and running the AC for 20 days. Enter your actual days for a more accurate figure.
A family runs a 1.5 ton 3-star inverter AC (about 1,100 W) for 9 hours a night through a hot July, at a rate of 0.14 per kWh.
The single largest lever for most households is not the unit itself but the set temperature and the number of running hours, both of which the calculator lets you model directly.
How much is the monthly bill for a 1.5 ton AC?
5-star inverter, 8 hrs/day, 30 days: USA ~$36; UK ~£65; India ~₹1,920; UAE ~AED 89; Australia ~AU$70. Enter your wattage and tariff above for your exact figure.
How does star rating affect the monthly bill?
Each star class improves efficiency by ~10 to 15%. A 5-star unit costs ~30 to 40% less per month than a 1-star or non-rated unit of the same tonnage.
What is the most expensive month to run an AC?
Peak summer months when outdoor temperature is highest. May to June in India; June to August in the Gulf; July to August in southern USA; December to January in Australia. On peak days, hourly consumption can be 40 to 60% higher than on a moderate summer day.
How can I reduce my monthly bill without reducing usage?
Raise the set temperature to 26°C (saves ~24%); clean filters (saves 10 to 25%); use a ceiling fan (allows higher set point); use the sleep timer overnight. Together these can reduce the monthly bill by 30 to 40% with no loss of comfort.
Does the monthly cost vary by season?
Significantly. The same AC can cost 40 to 70% more per month in peak summer than in mild shoulder months, because the compressor fights a larger temperature gap and often runs more hours per day.
Estimates are based on the wattage and tariff entered. Actual costs vary with outdoor temperature, set point, and unit condition. Override wattage field with your label reading for maximum accuracy.