How to Calculate Square Footage - Area Calculator

Learn how to calculate square footage for rectangles, circles, triangles, and more. Professional square footage calculator with visual preview and step-by-step instructions.

Basic

Rectangle

Example:

Length: 5, Width: 3 = 15 sq ft

Input Unit

Output Unit

Length*(m²)

Width*(m²)

Basic

Square

Example:

Side: 4 = 16 sq ft

Input Unit

Output Unit

Side*(m²)

Basic

Circle

Example:

Radius: 3 = 28.27 sq ft

Input Unit

Output Unit

Radius(m²)

Diameter(m²)

Provide radius or diameter. If diameter is provided, it will be converted to radius.

Basic

Triangle

Example:

Base: 6, Height: 4 = 12 sq ft

Input Unit

Output Unit

Base(m²)

Height(m²)

Side A(m²)

Side B(m²)

Side C(m²)

Provide (base and height) or (all three sides). For three sides, calculation uses Heron's formula.

How to Calculate Square Footage - Features & Guide

Key Features

• Multiple units support (sq ft, sq m, sq in, etc.)
• Visual shape preview with dimensions
• Step-by-step calculation process
• Automatic unit conversion
• Real-time calculation updates

How to Calculate Square Footage Methods

• Triangle: Base × Height or Heron's formula
• Circle: π × Radius² or from diameter
• Multi-component composite shapes
• Room area for renovation projects
• Material quantity estimation

Professional Applications

Construction

Floor area, wall area, roofing calculations

Design

Material requirements, paint coverage

Landscaping

Garden beds, lawn area, irrigation zones