Why One Degree on Your AC Moves the Bill
The bigger the gap between your AC's set temperature and the actual room temperature, the harder the outdoor compressor works, which drives up power consumption. A widely cited rule of thumb from energy agencies holds that lowering the set temperature by 1 degree increases power draw by roughly 7%. Raising it by 1 degree tends to save a similar amount.
This calculator takes your current and target temperature, your AC's power draw, daily usage hours, and your electricity rate to compare monthly cost before and after the adjustment. During peak cooling season, seeing exactly how much a 1–2 degree change moves your bill helps you make a practical, informed decision instead of guessing.
Keep in mind the 7% figure is an average approximation — actual results depend on outdoor temperature, insulation, and whether the unit is inverter-based. Use this as a general guide to the direction and rough size of the cost impact rather than an exact prediction.
Frequently Asked Questions
As a general rule, lowering the set temperature by 1 degree increases power consumption by about 7%. Raising it by 1 degree tends to save about the same amount.
It is a widely cited empirical estimate from energy agencies that approximates the average increase in compressor load per degree. Actual results vary by unit and environment.
If there is no change in the set temperature, the cost difference is calculated as $0, and the new cost matches the original cost exactly.