AC Tonnage & Power Bill Calculator (India 2026)
Avoid high electricity bills and poor cooling. Enter your room specifics below to calculate the scientifically exact AC capacity and 5-star vs 3-star savings.
Based on 168 sq. ft with moderate sunlight .
For 1.5 Ton, we recommend 5-Star Dual Inverter models with copper coils and anti-corrosive coating for longevity.
Frequently Asked Questions About AC Sizing
What happens if I install an undersized AC?
An undersized AC (e.g. 1.0 Ton in a 180 sq ft room) will force the inverter compressor to run continuously at 100% capacity. It will struggle to lower the room temperature on 42°C+ summer afternoons and burn significantly more electricity.
Is an oversized AC better?
No. Installing a 2.0 Ton AC in a 100 sq ft room cools the air too rapidly without properly dehumidifying the space, leaving the room feeling cold and clammy while wasting money on higher upfront equipment costs.
Is a 5-Star AC worth the ₹5,000–₹8,000 premium over a 3-Star AC?
If you run your AC for more than 6 to 8 hours daily during summer, the 5-Star AC pays back its price difference in less than 2 years through electricity savings. If you only run it for 2 hours before sleeping, a 3-Star AC is more cost-effective.