Trowla

Insulation Calculator

Estimate how many bags or rolls of insulation your project needs based on the area and the product coverage.

Built for contractors, not spreadsheets

525.00 sq ft — Coverage to buy
14.00 bags — Bags / rolls

Build a priced estimate

Material prices are your cost — add a markup. Your labor rate is what you bill the client. Saved on this device.

Add your company details

Optional — puts your company on branded PDF quotes and unlocks your saved dashboard. Everything stays on your device.

Frequently asked questions

How do I calculate insulation coverage?

Divide the area to insulate by the coverage listed on the bag or roll, then add a small waste factor. This calculator does it for you.