How do I calculate square footage of a room?

Multiply length × width for rectangular rooms. A 12×15 foot room = 180 square feet. For L-shaped rooms, divide into rectangles, calculate each, and add them together. The calculator handles multiple shape types.

How do I convert square feet to square meters?

Divide square feet by 10.764 to get square meters. For example, 500 sq ft ÷ 10.764 = 46.45 sq m. The calculator automatically converts between unit systems.

How do I calculate the area of a circle?

Use the formula Area = π × radius². For a 10-foot diameter circle: radius = 5 feet, Area = 3.14159 × 25 = 78.54 square feet. The calculator handles circular areas automatically.

How do I measure an irregularly shaped room?

Break the room into basic shapes (rectangles, triangles, circles). Calculate each shape separately and add them together. For very complex shapes, use the average of length measurements.

What areas should I include when measuring a house?

Include all heated living space. Exclude garage, unfinished basement, and outdoor areas. Finished attics and basements count if they have permanent stairs, heating, and meet ceiling height requirements.

How is commercial square footage different from residential?

Commercial spaces often use 'rentable' vs 'usable' square footage. Rentable includes common areas (hallways, lobbies) proportionally. The difference (load factor) typically adds 10-20% to usable space.

Square Footage Calculator

GeometryReal EstateConstruction

GeometryReal Estate

Enter dimensions to calculate area in square feet or other units

Frequently Asked Questions

Common questions about this calculator

Square Footage Calculator

Shape Selection

Dimensions

Frequently Asked Questions

Square Footage Calculator

Shape Selection

Dimensions

Frequently Asked Questions

01How do I calculate square footage of a room?

02How do I convert square feet to square meters?

03How do I calculate the area of a circle?

04How do I measure an irregularly shaped room?

05What areas should I include when measuring a house?

06How is commercial square footage different from residential?