How We Calculate Your AC Bill
The biggest mistake people make when calculating AC power consumption is assuming the AC draws maximum power 100% of the time. If you have an Inverter AC, the compressor actually throttles down to about 40% to 60% capacity once the room reaches your desired temperature.
Our calculator mathematically accounts for this by applying an operational efficiency modifier. Non-inverter ACs operate at roughly 95% capacity while they are switched on, whereas modern inverter ACs average around 60% capacity over an 8-hour period (assuming your room is properly sealed and you set the temperature to a reasonable 24°C).
How to Find Your AC's Input Power (Watts)
Do not confuse "Cooling Capacity" with "Input Power". A 1.5 Ton AC has a cooling capacity of roughly 5200 Watts, but its actual electrical Input Power will be between 1300W and 1800W depending on its Star Rating.
- 5-Star 1.5 Ton Inverter: ~1250W to 1450W
- 3-Star 1.5 Ton Inverter: ~1550W to 1750W
- 5-Star 1.0 Ton Inverter: ~850W to 950W
- 3-Star 1.0 Ton Inverter: ~1000W to 1150W
To get the most accurate result, look at the physical BEE Star Label pasted on your indoor unit. Look for the row that says "Power Consumption" or "Input Power".