Ductwork Replacement Cost Calculator
Last updated: July 2026
Estimate HVAC ductwork replacement cost from conditioned area, unit rate, demolition, access difficulty, sealing, repairs, permits and contingency.
Estimated ductwork replacement cost
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- New ductwork before access adjustment: —
- Access-adjusted ductwork cost: —
- Removal, sealing and repairs: —
- Contingency: —
On this page
Quick summary: Estimate HVAC ductwork replacement cost from conditioned area, unit rate, demolition, access difficulty, sealing, repairs, permits and contingency. Enter the requested values, calculate, review the result, and compare more than one realistic scenario before making a decision.
Read the complete guide
What this calculator estimates
Estimate HVAC ductwork replacement cost from conditioned area, unit rate, demolition, access difficulty, sealing, repairs, permits and contingency. It is designed for fast planning and comparison in the United States. The output is an estimate, not a binding quote, approval, tax determination, insurance offer or professional recommendation.
How to use it
Enter the requested values using a single consistent time period and currency. Select Calculate, review the headline result and supporting figures, then change one assumption at a time to compare another scenario.
How the calculation works
Conditioned area is multiplied by the entered unit rate and adjusted for access difficulty. Removal, sealing, repairs, permits and contingency are added.
Important limitations
Layout, duct type, asbestos, crawlspace height, zoning, registers, insulation, code and contractor minimums affect actual bids.
Frequently asked questions
Is the result exact?
No. It is a planning estimate based on the assumptions entered.
Can I compare different scenarios?
Yes. Change one input at a time so you can see which assumption changes the result.
Does the calculator store my inputs?
The calculation runs in the browser and does not require an account. Avoid entering unnecessary confidential information.