Square Footage Calculator
Calculate the square footage of a room or lot, and the total cost based on a price per square foot.
Why square footage matters in real estate
Price per square foot is one of the most common ways to compare properties on a like-for-like basis, since it normalizes for size — a larger house isn't necessarily a better deal than a smaller one until you compare their price relative to actual living space.
That said, price per square foot has limitations as a comparison tool — it doesn't account for lot size, location desirability, finish quality, layout efficiency, or amenities, all of which can meaningfully affect a property's actual value beyond raw square footage.
Measuring irregular spaces
For a simple rectangular room, this calculation is straightforward. For irregular or multi-section spaces (an L-shaped room, a house with multiple wings), the most accurate approach is to break the space into simple rectangular sections, calculate each separately, then sum the totals.
It's also worth being consistent about what's included — some square footage figures include garages, porches, or unfinished basements while others don't, which can create confusion when comparing figures from different sources.
Frequently asked questions
Is price per square foot a reliable way to compare properties?
It's a useful starting point for comparing similar properties, but it doesn't account for lot size, location, finish quality, or layout — treat it as one data point among several rather than a complete valuation method.
How do I calculate square footage for an irregularly shaped room?
Break the space into simple rectangular sections, calculate the square footage of each separately, then add the totals together for the full area.