📐 Conversion & Reference

8 calculators

Unit conversion, mix ratios, steel weights, timber spans and U-values.

Convert metres, feet, m², ft², m³, yd³, kg, tonnes and more.

Stretcher, Flemish and English bond patterns.

Mortar and concrete mix ratios by strength class.

Floor and roof imposed loads by use class.

Section weight per metre — UB, UC, RHS, CHS.

Maximum span by section size and timber grade.

Wall, roof and floor build-up thermal resistance.

Window area vs floor area and room depth.

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