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THE SUMFIZZ LIBRARY

Home renovation and materials calculators

Explore 25 free tools for home renovation and materials. Find wall paint quantity, flooring packs, tile quantity and more. Each calculator explains its inputs and method, with examples you can try using your own numbers.

THE SUMFIZZ LIBRARY

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25 calculators

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Wall paint quantity

Use net paintable area times coats divided by product coverage.

Home renovation and materials

Flooring packs

Waste is added before rounding up to complete packs.

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Tile quantity

Uses tile face area and a waste allowance; no reduction for grout gaps.

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Wallpaper rolls

Full drops are rounded up; pattern repeat rounds the drop length up to a repeat.

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Concrete volume

Volume equals length × width × depth, with depth converted from centimetres.

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Grout quantity

Uses the common thin-joint approximation.

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Tile adhesive quantity

Use the supplier consumption for the substrate and trowel.

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Plaster quantity

Consumption is per square metre per millimetre.

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Skirting board lengths

This is a total-length estimate.

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Coving length

Uses rectangular-room perimeter and entered exclusions; corner cuts are not optimised.

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Roof sheet quantity

Use effective cover dimensions after overlap.

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Gutter lengths

Rounds each independent run separately.

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Insulation packs

Use the coverage stated for the selected insulation thickness.

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Drywall sheets

An area-based material estimate; framing, sheet orientation and offcuts can increase the requirement.

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Brick quantity

Counts a single visible wall face using nominal modules including joints.

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Mortar quantity

Enter a mortar allowance suitable for the brick and joint geometry.

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Fence panels

Model assumes a straight run with posts at both ends and one post between panels.

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Decking boards

Total-area estimate using effective board cover width.

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Stair geometry

Assumes the upper landing serves as the final tread.

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Ramp gradient

Gradient is rise divided by horizontal run.

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Roof pitch

Use the same units for rise and run.

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Roof area

Applies to roof planes with one common pitch.

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Sealant cartridges

Rectangular joint cross-section, without waste.

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Radiator paint area

The surface multiplier approximates additional panels and contours.

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Renovation contingency budget

Contingency is a budget allowance chosen by you, not a prediction of final cost.

Home renovation and materials