The answer to 'how much does air conditioner cost' is that the cost of an air conditioner can vary widely depending on several factors. In general, a new central air conditioning unit can range from $3,000 to $7,000 or more, installed. Factors that affect the cost include the size of your home, the efficiency rating of the unit, the complexity of the installation, and your local market conditions.
Smaller window units or portable air conditioners are typically less expensive, usually ranging from $300 to $800 or more. The final cost will also depend on any necessary electrical or ductwork modifications required for the installation. It's best to get quotes from local HVAC contractors to get an accurate estimate for your specific needs and location.