AC replacement costs
Central air installation cost calculator: Method and Sizing Limits
Choose a project for a sourced planning range.
Installed planning range
Ready to calculate
National allowances are filled in. Calculate now or edit them to match your written scope.
Scope, itemized amounts and limits
Each low, typical and high total adds that column once. Endpoints are allowance sums, not statistical confidence limits. The guide high is not a price ceiling.
Tax, financing, incentives and unknown work are excluded.
Formula v2.1. Sources checked October 14, 2026. Method and corrections.
Paper method and limits
Add each low column once, then each typical column and each high column. An installed bundle already includes equipment and labor. Add only separately priced extras. Cooling already included adds no second amount. Keep unknown work outside the subtotal. Guide endpoints are not guaranteed prices.
National planning allowances and source limits
US dollars, checked October 14, 2026. These defaults include equipment and installation once. The typical column is a calculated allowance, not a measured national median. Each value is editable in the tool.
| Scenario | Low | Typical allowance | High guide endpoint | Efficiency and scope |
|---|---|---|---|---|
| Central AC, retained ducts | $3,000 | $7,425 | $15,000 | SEER2 not stated. Central AC guide envelope with equipment and installation. Confirm matched coil, line set and electrical scope. New ducts and unconfirmed work are unpriced; do not add a second labor charge. Sources: Angi central AC buying guide; Bryant HVAC pricing guide |
Low and high span the cited guide ranges. Typical is the median of the range midpoints, rounded to a whole dollar. It is a planning amount, not a measured project median.
Related source records are not claimed to be independent surveys. This is not one controlled set of equal-scope jobs. Unknown capacity stays unknown. No size, weather or location price multiplier is used.
- Angi central AC buying guide. Published/revised: See source for revision date. Checked: 2026-10-14. Installed central AC $3,800-$7,900. Reusable ducts assumed; no new duct network priced.
- Bryant HVAC pricing guide. Published/revised: 2026 guide; exact revision date not shown. Checked: 2026-10-14. Central AC $3,000-$15,000; complete HVAC $5,000-$28,000. Broad guide scope, not a matched-system quote.
Published scopes differ. Upper endpoints marked “+” in a source are open-ended. Taxes, incentives, financing and unresolved site work are outside the subtotal. Read the method and correction history.
Sections9
- Central air installation cost calculator: choose the job
- Capacity and matched equipment
- Existing, repaired or new ducts
- Electrical, line-set and access allowances
- Your installed budget breakdown
- Central air installation cost calculator method
- Quote checklist and print record
- FAQ
- Verdict: use the result to compare installed scope
This central air installation cost calculator gives an installed planning range from national guide allowances. You can get an estimate without entering your own prices, then edit the low, typical and high fields to match a written bid. The tool keeps unit and labor bundles separate from unknown ducts, power work and permits.
Start with the national central AC scenario if you do not yet have bids. It includes one installed base allowance. Mark ducts and other site work as included, extra or unknown. The typical point is calculated from source-range midpoints, not a measured median. New ducts and unconfirmed coil or power scope stay outside the subtotal until you price them.
Central air installation cost calculator: choose the job
Choose Replacement if the house already has central cooling. Choose New installation if you are adding it. The base guide envelope stays the same until you enter a documented scope difference. The tool does not guess a first-install surcharge.
That matters because adding central AC can involve work absent from a swap. An existing heating duct system may need airflow changes. A house without ducts needs an air distribution plan. A price for an outdoor cabinet does not answer either question.
Use the central air installation cost guide for retrofit scope. For a like-for-like change, the AC replacement guide explains indoor and outdoor matching. Both routes keep the job definition ahead of the number.
Capacity and matched equipment
Size is optional in this budget tool. Leave it blank if you do not have a load report or full model record. The result will state that size is unknown. Entering a size records your basis; it does not apply a hidden price multiplier.
The source ranges cover many sizes and job types. They do not supply a controlled price curve for every tonnage. That is why changing the size field cannot honestly double or halve the allowance.
| Field | What to enter | What the tool does |
|---|---|---|
| Capacity | A stated equipment or load figure | Prints it beside the result |
| Unit | Cooling tons or the stated BTU/h unit | Keeps the meaning visible |
| SEER2 | Rating of the full matched system, if known | Records it; no assumed premium |
| Source or model | Guide reference or written quote details | Names the evidence for your prices |
Scroll for more →
Keep the full indoor and outdoor models in your bid sheet. ACCA Manual S is the unit-selection reference. Manual J is the load reference. This tool does neither task.
Existing, repaired or new ducts
Use the ductwork scope field to record what the bid covers. A retained network is not by itself sound. Its layout and airflow need to fit the new cooling system. This page supplies no duct design rules or job steps.
| Duct condition | Useful record | Calculator treatment |
|---|---|---|
| Retained and covered by base scope | Bid states the accepted existing network | Mark confirmed included or not required |
| Priced repair | Written repair scope and amount | Enter a separately priced extra |
| New network | Design and installation proposal | Enter the stated extra once |
| Not assessed | No written scope | Leave unknown and unpriced |
Scroll for more →
An unknown duct amount is not a zero-dollar duct job. The tool places it on a separate unpriced list. You can still obtain the base planning subtotal, but the output explains that the whole-project total is not yet known.
Electrical, line-set and access allowances
The base scenario includes the installation job once. Do not add a second full job charge unless you switch to separate unit and installation fields using written amounts. That switch clears the old bundle amounts to avoid disguising an installed price as a unit price.
For an extra allowance, fill all three price fields. The typical amount must sit within the low and high endpoints. A known fixed quote can use the same amount in all three fields. Do not use a token dollar amount for work you have not priced.
Keep the line set and drainage scope separate from power supply. An existing circuit may be accepted, or the bid may require a new one. The price and required work are home-specific. You cannot settle them with a national job average.
Record access and restoration duties. The access field adds only a stated task outside the base bundle.
Your installed budget breakdown
The result shows a low-to-high subtotal and a typical planning allowance. It lists every amount that was added, then lists unknown work separately. Confirmed included work adds no second charge.
Read the result in this order: price basis, counted scope, unknown scope. A smaller subtotal can simply mean more work is unpriced. The tool cannot tell which bidder has the better offer until those scope gaps are resolved.
Taxes, loan costs and rebates are excluded. This prevents an unverified credit or rate from making the estimate look more precise. A future rebate may matter to your decision, but it does not reduce this planning subtotal without current evidence.
Central air installation cost calculator method
For each column, add the base amount and every separately priced extra. In separate mode, add the unit and job amounts. In bundle mode, the unit and labor are counted together.
| Column | Paper worksheet formula | Meaning |
|---|---|---|
| Low | Base low + each extra low | Low allowance sum |
| Typical | Base typical + each extra typical | Calculated planning point |
| High | Base high + each extra high | High allowance sum, not a maximum price |
| Unknown work | List the name and missing evidence | No amount silently added |
Scroll for more →
The source block shows guide scopes and dates. The method page records the midpoint rule. Those sources are planning context, not a price survey of equal jobs.
Quote checklist and print record
Before using a bid as an override, record the full model combination. Check coil, controls, line set, drainage, circuit and disposal scope. State whether permits and new ducts are included. Use the same record for every bid.
Print after calculating to retain the populated fields and result. Changes to any input mark the old output stale. Recalculate before printing an updated total. Reset restores the national defaults and clears the prior result.
Without JavaScript, the fields, national source table and formulas remain visible. Add the three columns by hand. Keep the unpriced checklist on the same sheet so the subtotal cannot be mistaken for the full bid.
FAQ
Do I need a ZIP code to get the estimate?
No. The estimate uses national ranges. It asks for no personal details. You can edit prices when actual bids arrive; it does not promise local labor rates.
Why is there no automatic price change by tonnage?
The sources cover different jobs. They do not prove one dollars-per-ton rule. Record size beside the result, then price the actual matched equipment and site work.
Can I put zero in an unknown permit field?
Leave the permit state unknown. Zero would imply a known amount. Mark included only when the actual scope supports it, or add the real fee.
Is the typical allowance what I will probably pay?
No probability claim is made. It is the median of the cited range midpoints and is shown to help build a working budget. The sources are not one controlled set of equal-scope local jobs. A written bid for your home can differ from that point and from the guide endpoints.
Verdict: use the result to compare installed scope
The central air installation cost calculator gives you a useful starting subtotal and a list of work still to price. Replace defaults when a written bid supplies better evidence. For a project that also changes heating, use the main furnace and AC worksheet rather than adding two overlapping installed bundles.