Square Foot Calculator House
Calculate the total square footage of a house. Add rooms floor by floor to get the complete home area in square feet.
House Square Footage Calculator
Add each room in your house to calculate the total living area.
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Room 2
Room 3
How to Calculate Square Footage of a House
Calculating a house's total square footage is essential for real estate listings, property taxes, renovation planning, and HVAC sizing. The most accurate method is measuring each room individually.
House Measurement Method
- Create a floor plan sketch of each level of the house.
- Measure each room — length and width from wall to wall.
- Calculate each room's area (Length × Width) and write it on the sketch.
- Include hallways, closets, and staircases in the measurement.
- Add all room areas together for the total living space.
What to Include vs. Exclude
Bedrooms, bathrooms, kitchen, living room, dining room, hallways, closets, foyers, staircases, finished basements, finished attics.
Garage, unfinished basements, unfinished attics, exterior porches, patios, utility rooms without direct access.
Typical House Sizes
- Small house: 800–1,200 sq ft (74–111 sq m)
- Average house: 1,500–2,500 sq ft (139–232 sq m)
- Large house: 3,000–5,000 sq ft (279–465 sq m)
Frequently Asked Questions
How do I calculate the total square footage of a house? +
Measure each room individually (length × width), include hallways, closets, and staircases, then add all room areas together.
What rooms should I include? +
Include bedrooms, bathrooms, kitchen, living areas, hallways, closets, foyers, and staircases. Exclude garages, unfinished basements, and exterior areas.
How is square footage measured for real estate? +
Real estate square footage typically includes only finished, heated living space measured from exterior wall to exterior wall. Standards vary by region.
What is the average house size? +
The average US home is about 2,300 sq ft. Small homes: 800-1,200 sq ft. Medium: 1,500-2,500 sq ft. Large: 3,000+ sq ft.