Urban Builder Guide
Comprehensive Toolset
Select from basic mathematical shapes or specialized civil engineering cross-sections for immediate area calculations.
Basic Geometry
Structural Members
Flexible Output
16 Standard Geometric Shapes
22 Civil Engineering Shapes
Instant Multi-Unit Conversions
Calculate surface coverage for squares, rectangles, triangles, circles, ellipses, sectors, annuluses, and regular polygons.
Dedicated formulas for slab surfaces, footing pads, beam cross-sections, column profiles, walls, and excavation trenches.
Input dimensions in feet, meters, or inches and automatically receive output in m², ft², acres, and hectares.
Complete Your Engineering Calculations
Pair your area calculations with our dedicated concrete, mortar, brick, and volume estimation spreadsheets.