Your AC & Usage
Your Running Costs
| AC Size | 5-star / A+++ (inverter) | 3-star (standard inverter) | Non-inverter / old unit |
|---|---|---|---|
| 0.75 ton / 9,000 BTU | 550–700 W | 700–900 W | 900–1,100 W |
| 1 ton / 12,000 BTU | 700–900 W | 900–1,150 W | 1,100–1,400 W |
| 1.5 ton / 18,000 BTU | 900–1,150 W | 1,200–1,550 W | 1,550–2,000 W |
| 2 ton / 24,000 BTU | 1,200–1,500 W | 1,600–2,000 W | 2,000–2,600 W |
| 2.5 ton / 30,000 BTU | 1,500–1,900 W | 2,000–2,500 W | 2,500–3,200 W |
| Country / Region | Typical domestic tariff | Monthly cost example (1.5 ton 5-star, 8 hrs/day) |
|---|---|---|
| USA (average) | $0.12–0.18/kWh | $28–$43 / month |
| UK | £0.24–0.30/kWh | £56–£70 / month |
| Australia | AU$0.25–0.35/kWh | AU$58–$82 / month |
| Germany | €0.30–0.40/kWh | €70–€94 / month |
| India | ₹5–10/kWh | ₹1,175–₹2,350 / month |
| UAE | AED 0.23/kWh | AED 54 / month |
| Saudi Arabia | SAR 0.05–0.18/kWh | SAR 12–42 / month |
| Singapore | S$0.27–0.30/kWh | S$63–$70 / month |
| Canada | CAD 0.10–0.18/kWh | CAD $23–$42 / month |
| AC type | Wattage | Monthly cost (8 hrs, $0.14/kWh) | Yearly cost (6 months) | 5-year total |
|---|---|---|---|---|
| 1.5 ton 5-star inverter | 1,000 W | $33.60 | $201.60 | $1,008 |
| 1.5 ton 3-star inverter | 1,350 W | $45.36 | $272.16 | $1,361 |
| 1.5 ton non-inverter | 1,700 W | $57.12 | $342.72 | $1,714 |
How much electricity does a 1.5 ton AC use per month?
Running 8 hrs/day for 30 days: a 5-star inverter 1.5 ton uses ~240 kWh. A 3-star non-inverter uses ~410 kWh. Multiply by your local tariff for the cost in your currency.
Where do I find my AC's wattage?
On the energy label on the indoor unit, in the product manual, or on the manufacturer's website under specifications. For inverter ACs, use the rated input at standard conditions — around 75% of the maximum — for an average estimate.
What is the electricity tariff in my country?
Typical rates: USA $0.12–0.18/kWh; UK £0.24–0.30/kWh; Australia AU$0.25–0.35/kWh; India ₹5–10/kWh; UAE AED 0.23/kWh. Check your electricity bill for your exact rate — it varies by provider and consumption slab.
How much does it cost to run AC all day (24 hours)?
A 1.5 ton 5-star inverter running 24 hours at ~1,000W uses ~24 kWh. At $0.15/kWh (USA): $3.60/day. At £0.27/kWh (UK): £6.48/day. At ₹8/kWh (India): ₹192/day.
Does a lower temperature setting use more electricity?
Yes — each degree lower adds ~6% to electricity consumption. Setting 22°C instead of 26°C uses roughly 24% more electricity. The most cost-effective setting is 24–26°C with a ceiling fan running.
How accurate is this calculator?
The formula is exact — it multiplies your wattage by hours by rate. The approximation comes from the wattage input: inverter ACs vary their draw. For a more accurate figure, check your smart meter or electricity bill for the kWh drawn by the AC circuit over a known period.
Estimates are based on the wattage and tariff you enter. Actual consumption varies with outdoor temperature, set point, room conditions, and unit efficiency over time.