Price per square foot (PPSF) is the single most portable metric in residential real estate. It strips away the raw sticker price and lets you compare a compact urban condo to a sprawling suburban ranch on equal footing — all in one number. Whether you are buying, selling, or renting, understanding PPSF helps you spot overpriced listings, recognize genuine value, and negotiate with data rather than gut feel.
How price per square foot is calculated
The formula is straightforward: divide the total price by the total area. A $400,000 home with 2,000 sq ft costs $200/sq ft. A $600,000 condo with 1,400 sq ft costs $428/sq ft. Despite the larger absolute price, the condo is more expensive on a per-area basis — information that only surfaces when you normalize for size.
The calculator supports both square feet (used in the United States and Canada) and square meters (the international standard). Internally it converts between the two using the exact factor of 1 sq m = 10.7639 sq ft, so you always see both figures regardless of which unit you enter.
What drives PPSF differences between properties
Location is by far the largest driver. PPSF can vary by 5× or more between neighborhoods in the same metro area. Within a location, finishes, age, lot size, and views create secondary variation. New construction typically commands a premium of 10–25% over comparable resale homes in the same area. High-rise condos in dense urban markets can trade at $600–$1,500+/sq ft, while rural single-family homes may sit at $80–$150/sq ft.
Year of sale matters too. During 2020–2022, median PPSF across major U.S. markets rose 30–50% in under two years before moderating. Always compare a subject property against recent comps (within the last 6 months in a fast market) rather than older data.
Limits of the metric
PPSF assumes all square footage is equally valuable — it is not. A third bedroom on the same floor adds more value than a finished basement. Outdoor living space, garage area, and unfinished square footage inflate the denominator without contributing equivalently to sale price. Listings also vary in what counts: some include garages, others do not.
Use PPSF as a screening metric and directional guide, not a final valuation tool. When you find a property with a PPSF that looks low relative to the market, dig into what explains the gap before assuming it is underpriced — deferred maintenance, layout problems, or a difficult location are common culprits.