Home Insulation Cost Calculator
Last updated: October 15, 2026
Estimate insulation upgrade cost, rebates, annual energy savings and simple payback using area, material and air-sealing assumptions.
Starting figures illustrate this model. Enter your own measurements, quoted costs and applicable terms; this page does not retrieve live prices or provider rates.
Estimated net insulation project cost
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- Gross project cost: —
- Rebates and incentives: —
- Estimated annual energy savings: —
- Simple payback period: —
On this page
Quick summary: Estimate insulation upgrade cost, rebates, annual energy savings and simple payback using area, material and air-sealing assumptions.
Read the complete guide
Updated reference sections in this guide are in English.
What this calculator estimates
Estimate insulation upgrade cost, rebates, annual energy savings and simple payback using area, material and air-sealing assumptions.
How to use it
Enter Insulation area (sq ft); Installed insulation cost per sq ft ($); Air sealing cost ($); Old insulation removal ($); Access and finish repairs ($); Rebates and incentives ($); Estimated annual energy savings ($). Select Calculate to update the results.
How the calculation works
Insulation area is multiplied by the installed unit rate. Air sealing, removal and access costs are added, rebates are subtracted and payback divides net cost by annual savings.
Worked example: starting scenario
| Insulation area (sq ft) | 2200 |
|---|---|
| Installed insulation cost per sq ft ($) | 3.25 |
| Air sealing cost ($) | 1800 |
| Old insulation removal ($) | 1200 |
| Access and finish repairs ($) | 700 |
| Rebates and incentives ($) | 1500 |
| Estimated annual energy savings ($) | 850 |
| Estimated net insulation project cost | $9,350.00 |
|---|---|
| Gross project cost | $10,850.00 |
| Rebates and incentives | $1,500.00 |
| Estimated annual energy savings | $850.00 |
| Simple payback period | 11 years |
Important limitations
Climate, R-value, material, ventilation, moisture, attic access, utility rates and rebate eligibility affect cost and savings.