Australian Construction Calculators · 251 Tools
Construction estimates, with the maths shown.
Free, instant, Australian metric.
Concrete volumes. Roof tiles. Paint litres. Boiler sizes. Every formula is shown, every number is editable, and nothing leaves your browser.
Most-used calculators
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Concrete Slab Calculator
Calculates concrete volume for slabs, paths, and driveways
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Colorbond Roofing Calculator
Estimates metal roof panels, screws, and trim for standing seam and corrugated
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Paint Calculator
Calculates litres or gallons of paint for walls, ceilings, and trim
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Brick Calculator
Estimates bricks for walls
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Ceiling / Roof Insulation Calculator
Calculates rolls of mineral-wool ceiling insulation
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Home Extension Cost Calculator
Estimates build cost for extensions per m² or ft²
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Concrete & Foundations (17)
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View all →Time & Labour (10)
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View all →HVAC & Ventilation (1)
View all →Landscaping & Outdoor (22)
View all →Structural Steel & Metal (5)
View all →Project Cost Estimators (16)
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View all →Swimming Pool (6)
View all →Estimates, not advice.
BuildMetricLab is a planning tool. Results are intended to help you scope a job and request quotes — they are not a substitute for a qualified trade quote, structural engineer's calculation, or National Construction Code (NCC) sign-off. Always verify with a professional before ordering materials or starting works.