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Room Square Footage Calculator

Calculate floor area in square feet

Length (feet)

Width (feet)

Height (feet)

Number of Rooms

Square Footage Formula

Floor Area = Length × Width

Wall Area = 2 × (Length + Width) × Height

Total Area = Floor + Walls + Ceiling

Calculate room dimensions for flooring, painting, and decorating projects.

⚠ Add 10-15% extra for waste and cutting mistakes when ordering materials.

Common Room Sizes

Small Bedroom

10×12 ft = 120 sq ft

Master Bedroom

14×16 ft = 224 sq ft

Living Room

16×20 ft = 320 sq ft

Standard Kitchen

10×12 ft = 120 sq ft

Teaching Example: Room 15×12 ft with 8 ft ceilings. Floor = 180 sq ft. Walls = 2×(15+12)×8 = 432 sq ft. Ceiling = 180 sq ft.

Applications

Flooring Carpet Painting Real Estate Home Improvement

Frequently Asked Questions

How to calculate square footage?▼

Square Footage = Length × Width. For irregular rooms, divide into rectangles and sum the areas.

What is the formula for room area?▼

Rectangle: Length × Width. Triangle: (Base × Height) / 2. Circle: π × r². Add all sections for total.

How to measure a room?▼

Measure the longest length and width in feet. Use a tape measure and record dimensions to the nearest inch.

Why calculate square footage?▼

Needed for flooring, carpet, paint, wallpaper, real estate listings, and property value assessments.

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