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Insulation & Plasterboard Calculators

Estimate insulation, vapour barriers, plasterboard sheets, screws, and jointing compound for interior finish work.

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How many insulation batts do I need? Free calculator for mineral wool and PIR insulation — covers standard wall cavities.

How much plasterboard do I need? Free calculator for 12.5 mm & 15 mm sheets — estimates 1200×2400 mm boards for walls and ceilings.

Plasterboard screw calculator: How many screws per board? Free estimator — gives total count and boxes needed.

How much jointing compound do I need? Free calculator for plasterboard finishing — estimates buckets for taping, bedding & skim coats.

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