Guides & How-Tos

Square Footage Guides

Step-by-step guides with formulas, diagrams, tables and worked examples — for every common material, land and geometry calculation.

Library

Guides16
Categories3
DiagramsEvery guide
CostFree

Each guide explains the formula, shows a labelled diagram, walks a worked example, and includes reference tables you can use on the job. Pick a topic below.

Construction & Materials

Flooring Calculator (Square Feet)Room area, waste factors and how many boxes to order.Tile Calculator (Square & Rectangle)Convert tile size to sq ft and get an exact tile count.Mulch Calculator (Bulk Yards)Bed area × depth to cubic yards, plus bag conversions.Concrete Patio CalculatorCubic yards, bags per yard and slab thickness.Gable Wall Siding CalculatorRectangle + triangle area and siding squares.Drywall Square Footage EstimatorWalls + ceiling to sheets, mud, tape and screws.Roof Square Footage CalculatorFootprint × pitch multiplier to roofing squares.House Square Footage CalculatorANSI Z765 gross living area, explained.

Real Estate & Land

Lot Square Footage CalculatorWidth × depth to square feet and acres.Acreage for Irregular PlotsTriangulation and the Shoelace formula.Property Area CalculatorCombine shapes into one parcel area.

Core Geometry

Square Feet CalculatorThe formula, conversions and odd shapes.Triangle Area CalculatorBase × height and Heron's formula.Circle Area Calculatorπr², diameter and reference table.Trapezoid Area Calculator½(a + b) × height, made clear.Octagon Deck CalculatorArea and deck-board estimating.