AC Unit Replacement Cost Calculator

By Andrea · August 2026

Use this free 2026 estimator to get a planning range for replacing your air conditioner. Pick your system size, efficiency tier, and the scope of the job, and it returns a low-to-high installed cost range. It runs entirely in your browser — nothing you enter is sent anywhere or stored. Treat the result as a starting point for conversations with contractors, not a quote.

Estimate Your AC Unit Replacement Cost

Results are estimates only. Real pricing depends on your climate and region, the condition of your existing ductwork and line set, refrigerant type (R-410A vs. R-32), brand tier, electrical upgrades, permits, and local labor rates. Proper sizing should come from a Manual J load calculation — bigger is not better, and an oversized unit short-cycles and costs more to run.

What Moves Your Number

The biggest drivers are system size and scope. A larger home needs more tonnage, and cost climbs with it. Scope matters even more: swapping just the outdoor condenser is the cheapest path when the indoor coil and ductwork are healthy, while a full matched system with a new furnace sits at the top of the range. Efficiency is the next lever — a high-SEER2 system can cost well over one and a half times a standard-efficiency unit of the same size, though it may lower running costs. Ductwork that needs repair or replacement, refrigerant type, and regional labor rates round out the picture. Because the spread between the highest and lowest quote is often wide, getting three quotes from licensed HVAC contractors is the single best way to protect your budget.