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CENTRAL AC

Central AC Replacement Cost Calculator

Estimate the cost of a central AC replacement by size and efficiency.

JOB INPUTS

Enter your numbers

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Capacity in tons

Capacity in tons

Current U.S. seasonal efficiency class

Current U.S. seasonal efficiency class

Install hours

h
Install hours

Replace the indoor coil

Replace the indoor coil

Remove the old system

Remove the old system

Include permits

Include permits
Results update automatically
CALCULATED RESULTUSD
Estimated total cost$8,660.00
Outdoor + indoor units$6,210.00
Labor$900.00
Coil$800.00
Old unit removal$400.00
Permits$350.00
FORMULA USED3 t × $1,800.00 × efficiency + labor + coil + removal + permits = $8,660.00

HOW TO USE IT

How to use the Central AC Replacement Cost Calculator

  1. 1

    Choose the size in tons (2-5).

  2. 2

    Select the efficiency class (SEER2).

  3. 3

    Set labor hours, coil and old-unit removal.

  4. 4

    Review the total cost and line-item breakdown.

THE MATH

Central AC replacement cost formula

Total = size × price per ton × efficiency + labor + coil + removal + permits

The unit price runs ~$1,800/ton; SEER2 16 adds 15%, SEER2 20+ adds 40%. Labor runs ~$75/hr. The indoor coil ~$800.

PRACTICAL EXAMPLE

3 tons, SEER2 16, 12 hrs, coil included

Units = 3 × $1,800 × 1.15 = $6,210. Labor = 12 × $75 = $900. Coil = $800. Removal = $400. Permits = $350. Total ≈ $8,660.

FAQ

Frequently asked questions

How much does a central AC replacement cost in 2026?

Nationally, $5,500-$14,000 depending on size and efficiency.

What size do I need?

A professional should complete a load calculation; square footage alone is not enough.

SEER2 16 or 20+?

The higher tier costs more upfront but can reduce seasonal electricity use.