Free trade calculators

Quick material and cost calculators for the trades — no sign-up. Work out the numbers, then turn them into a professional estimate with a free BuilderBuddi account.

Concrete Calculator

Slab volume in m³, bags, and cost.

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Paint Calculator

Litres, cans to buy, and cost.

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Tile Calculator

Tiles, adhesive, and cost.

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Drywall Calculator

Boards (sheets) needed and cost.

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Plaster Calculator

Plaster bags and cost.

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Brick Calculator

Bricks, mortar, and cost.

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Roofing Calculator

Roof area, squares, tiles, and cost.

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Decking Calculator

Deck boards, length, and cost.

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Fence Calculator

Posts, panels, concrete, and cost.

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Retaining Wall Calculator

Blocks, courses, and cost.

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Gravel Calculator

Tonnes, m³, and cost.

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Topsoil Calculator

Cubic metres, bags, and cost.

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Flooring Calculator

Laminate / vinyl boxes and cost.

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Stair Calculator

Risers, treads, and stringer.

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Aircon BTU Calculator

Cooling load and unit size.

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More calculators coming — tiling, decking, plastering, fencing, and dozens more inside the app.

50+ trade calculators, quotes, and invoices in one app

BuilderBuddi runs your estimates and job admin from your phone — no office required. Free to start.

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