Area Formulas for Construction

Common area formulas used in civil engineering and estimating.

Area Formulas for Construction
Area Formulas for ConstructionVisual reference for this tool.

Area Formulas for Construction

Use these formulas for room areas, slabs, walls, plots and finishing quantities.

Rectangle A=L×W; Triangle A=½bh; Circle A=πr²; Trapezoid A=(a+b)h/2

Example

A 5 m × 4 m room has 20 m² area.

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Use this page with

  • Related calculators
  • Quantity estimators
  • Construction guides
  • Unit converters

Frequently Asked Questions

Are these values exact?

They are estimation values. Site conditions, product specifications and local practice can change final quantities.

Can I use this on mobile?

Yes. Civil Micros is designed to work on mobile browsers without a backend.

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