AC Replacement Cost Calculator
Central air conditioning is sized in tons, and efficiency sets the price per ton. Enter your system size and efficiency level to estimate the installed cost.
Most homeowners pay $6,800 to $10,200 for 3 tons, mid efficiency (16 to 17 SEER2).
Your estimate
- Materials and labor
- Add-ons
- Permit and disposal
National installed prices, materials and labor included. Your local quotes may differ.
AC Replacement cost by option
Installed totals (based on 3 tons), with standard conditions and permit and disposal included.
| Option | Typical total |
|---|---|
| Standard efficiency (14 to 15 SEER2) | $5,300 to $8,400 |
| Mid efficiency (16 to 17 SEER2) | $6,800 to $10,200 |
| High efficiency, variable speed (18+ SEER2) | $9,200 to $14,100 |
Installed price per unit
| Option | Installed price |
|---|---|
| Standard efficiency (14 to 15 SEER2) | $1,700 to $2,600 per ton |
| Mid efficiency (16 to 17 SEER2) | $2,200 to $3,200 per ton |
| High efficiency, variable speed (18+ SEER2) | $3,000 to $4,500 per ton |
What drives the price
- System sizeMost homes need 1.5 to 5 tons. A proper load calculation (Manual J) sizes the system to your house, not just its square footage.
- EfficiencyHigher SEER2 units cost more but use less electricity. They pay off fastest in hot climates.
- Matched componentsReplacing only the outdoor unit on an old indoor coil can hurt efficiency, so many installers replace both.
- TimingEmergency replacements in peak summer can cost more and take longer to schedule.
How this estimate works
The calculator multiplies your system size by the installed price range for the option you pick, then adds any extras you tick and typical permit and disposal. The headline number is the midpoint of your range. Low-end prices fit simple jobs in lower-cost areas. High-end prices fit complex jobs, premium brands and high-cost metros.
Get at least three written quotes before you hire. Ask each contractor to list materials, labor, permits and disposal separately so you can compare them line by line. Read how we build our ranges.
Common questions
How long does AC replacement take?
A straightforward replacement usually takes one day. Ductwork changes add time.
How long do central AC units last?
Many last around 12 to 17 years, depending on climate and maintenance.
What size AC do I need?
Size depends on climate, insulation, windows and layout. Ask installers for a load calculation rather than a rule of thumb.
Sources and method
Price ranges are national installed estimates maintained by the HouseMath editorial team and last reviewed September 2026. For the labor side of the job, see the U.S. Bureau of Labor Statistics Occupational Employment and Wage Statistics data for heating, air conditioning, and refrigeration mechanics and installers (SOC 49-9021), which shows how trade wages differ by state.