Insulation Calculator

Estimate insulation bags or batt packs from area coverage and waste.
Use standard measurements for quick calculations or draw irregular spaces, then apply package coverage and overage to get a more reliable shopping number for your target install area.

Currency

Length (m)Width (m)

Coverage per bag/batt pack (sq m)Waste percentage

Estimated insulation packs

17 bags/packs

Area: 55.75 sq m

Coverage per pack: 3.72 sq m

Waste: 8%

Cost & Budget Planner

Use your local pricing to turn quantity into a working budget range before calling stores or contractors.

Price per pack (CAD)Estimated labor (CAD)Contingency (%) (extra buffer for surprises)

Quantity basis: 17.0 insulation packs

Materials subtotal: CAD $0

Project subtotal: CAD $0

Contingency: CAD $0

Total budget: CAD $0

Planning ranges: DIY CAD $0 to CAD $0 | Contractor CAD $0 to CAD $0

Tips for Insulation Projects

Do not compress batts—coverage and R-value drop.
Plan for edge cuts and awkward cavities.
Attics usually need a higher R-value than walls.

Calculator

For quick arithmetic while measuring (areas, totals)—separate from the paint estimate.

How this estimate is calculated

Area: length x width (or draw mode area), converted to square feet internally.
Packs: area x (1 + waste %) divided by package coverage, rounded up.
Coverage: use the exact label coverage for your selected R-value.
Cost planning: use your entered material price for each calculated unit (or converted paint package pricing), then add labor and contingency to produce the total budget range.

DIY Learning Hub

Learn installation basics, material selection tips, and common mistakes before you buy.

Learn this project View all guides