Insulation batts calculator
Count packs of insulation batts for a ceiling or wall area, with extra layers if you need them.
Your measurements
How it's worked out
Packs = area × layers × (1 + waste) ÷ coverage per pack. Check the R-value your climate zone requires with your certifier or energy assessor.
Estimates only. Check sizes, coverage and quantities with your supplier, engineer or certifier before ordering. Standards references are a guide, not compliance advice.
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