How to compare states
Use the same AC size, SEER rating, and runtime assumptions, then change only the electricity rate and cooling days. This keeps comparisons fair and shows whether rate or runtime is the main cost driver.
State guides
Best use of this page
Use state comparisons for planning, then use your own utility rate for a personal estimate. Utility bills often include fixed fees and taxes that are not part of the pure AC running-cost formula.
Where to verify electricity rates
Use your utility bill for your exact price per kWh. For state-level background data, compare against public electricity resources from the U.S. Energy Information Administration.