Maths
Area & Geometry Calculator
Choose a geometric shape and calculate area, perimeter and angles with a visual representation.
TesCalculs advice
Area sizes surface-covering materials; perimeter is more useful for edging, skirting or fencing.
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Deck & patio guides
Plan the build, then calculate accurately
How to build a deck or patio: complete guideFrom planning and base preparation to materials, installation and finishing.Practical guideCalculate a deck or patio budgetQuantities, packs, labour, delivery, waste and identified risks.Practical guideBuild a deck or patio over soilChoose the foundation, excavate, compact and drain before installation.Practical guide
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