Insulating a loft, wall or floor? Enter the area to cover and the coverage per pack to find out how many packs of insulation you need. This free calculator rounds up so you never run short.
Insulation Calculator
How to Use
- Measure the area you want to insulate in square metres.
- Check the coverage per pack on the insulation packaging.
- Click “Calculate Packs” to see how many packs you need.
- The result rounds up so you have enough material.
Key Features
- Rounds up to whole packs — no shortfalls.
- Works for lofts, walls and floors.
- Instant calculation in your browser.
- Helps reduce waste and save money.
- Free with no sign-up.
FAQs
Why does it round up?
You cannot buy part of a pack, so the calculator rounds up to ensure full coverage.
What if my area is irregular?
Break it into rectangles, calculate each, and add the areas together.
Does it account for wastage?
Add 5 to 10 percent to your area for cutting waste on complex shapes.