Price Per Square Foot Calculator - Real Estate Comparison

Calculate price per square foot for any property and compare up to three listings side by side to find the real value.

Last updatedHow we build & check our tools
$
Results will appear here once you enter your values.

The Two Listings That Look Identical Until You Do the Math

Two homes hit the market on the same street, both listed at $425,000. The first is 1,700 square feet. The second is 2,100 square feet. Same neighborhood, same schools, same asking price. Most buyers stop reading there and pick based on the kitchen photos.

Here's the number they skipped. The first home costs $250 per square foot. The second costs $202 per square foot. For the same money, the second home gives you 400 extra square feet of living space. That's a bedroom and a home office you're getting for free, hidden inside an identical price tag.

Price per square foot is the single fastest way to compare properties that aren't the same size. You take the price and divide it by the finished square footage. A $400,000 home with 2,000 square feet runs $200 per square foot. A $480,000 home with 2,400 square feet also runs $200 per square foot. Now you can see they're priced identically, even though one costs $80,000 more on paper.

Why agents quote it constantly: it normalizes everything. A 1,200-square-foot condo and a 3,500-square-foot house can't be compared by price alone. Per square foot, you can stack them next to each other and see which seller is reaching. In most U.S. metros, single-family homes trade somewhere between $150 and $400 per square foot, with coastal cities pushing well past $700 and some markets sitting under $120.

Where it gets you in trouble: square foot figures lie by omission. A finished basement might count in one listing and not another. A 1980s ranch at $180 per square foot can be a worse deal than a renovated home at $240, because you're about to spend $90,000 fixing the cheap one. Lot size, garage space, and a brand-new roof never show up in the per-square-foot number. Use it to filter, not to decide.

This calculator does the division instantly and lets you line up three comparable properties at once, so the home that looks cheap and the home that actually is cheap stop being the same thing in your head.

How to Use Price Per Square Foot Without Getting Fooled

The number is only useful when you compare apples to apples. Start by confirming that every property measures square footage the same way. The most reliable standard is finished, above-grade living space, which is what most appraisers and the ANSI standard use. A 2,000-square-foot home with an 800-square-foot finished basement might be advertised as 2,800 square feet, which drops its price per square foot and makes it look like a steal it isn't.

Compare within the same bracket. Price per square foot drops as homes get larger, because the expensive parts (kitchen, bathrooms, HVAC, roof) get spread across more space. A 1,400-square-foot starter home will almost always show a higher per-square-foot price than a 3,200-square-foot home in the same neighborhood. Comparing a condo to a mansion by this metric tells you nothing. Compare homes within roughly 20 percent of each other's size.

Use it to spot the outlier. When you run three comparable homes and one sits at $190 while the other two are at $245, that gap is a question, not an answer. Maybe it's priced to sell fast. Maybe the roof is shot, the layout is awkward, or it backs onto a highway. The per-square-foot number flags the home worth investigating, then your inspection and walkthrough tell you why it's cheap.

Adjust for condition and location. A renovated home and a fixer-upper at the same price per square foot are not the same deal. Neither are two homes a mile apart if one is in the better school zone. Treat the metric as your first filter, then layer in the things it can't see: lot, garage, age, finishes, and what comparable homes actually sold for, not just what they're asking.

This calculator provides estimates based on the information you enter. For advice tailored to your situation, consult a qualified financial professional.

Worked example: checking a listing against three comparable sales

The calculator divides your property's price by its square footage, does the same for three comparable properties, averages the three per-square-foot figures, and reports how far your property sits above or below that average. It also multiplies the average by your square footage to give an implied value.

With the default numbers, a $450,000 home of 2,000 sq ft works out to $225.00 per square foot. The comparables are:

  • Comp 1: 420,000 ÷ 1,850 sq ft =227.03
  • Comp 2: 480,000 ÷ 2,200 sq ft =218.18
  • Comp 3: 400,000 ÷ 1,700 sq ft =235.29
  • Comp average: (227.03 +218.18 + $235.29) ÷ 3 = $226.83
  • Difference: ($225.00 − $226.83) ÷ $226.83 = −0.8%
  • Implied value: $226.83 × 2,000 = $453,669

Because the difference is within 5% either way, the badge reads Near Market. More than 5% above the average reads Above Market, and more than 5% below reads Below Market. Here the listing is about $3,700 under what the comps imply, which is small enough to be noise in a real negotiation.

Note that the average is a simple mean of the three per-square-foot prices, so each comp counts equally regardless of size. If one comp is much larger or smaller than your home, replace it with a closer match rather than letting it pull the average. The tool always uses three comp slots; to use fewer, enter a square footage of 0 for a slot, and that comp is left out of the average.

Choosing comps, and when price per square foot misleads

The quality of the comparison depends almost entirely on the three properties you enter. Appraisers typically look for sales that closed within the last three to six months, sit within about a mile in suburban areas (much closer in cities), and match on property type, age, bedroom and bathroom count, and condition.

  • Use sold prices, not asking prices. Asking prices tell you what sellers hope for. Closed sales from public records or your agent's MLS search tell you what buyers paid.
  • Keep the square footage definition consistent. If one listing includes a finished basement and another does not, the per-foot numbers are not comparable. Use above-grade finished area for all four properties where you can.
  • Mind the land. Price per square foot folds the lot into the building price. A home on a double lot or with water frontage will look expensive per foot even when the house itself is average.
  • Watch for size gaps. Smaller homes carry a higher price per foot because kitchens, bathrooms and mechanical systems cost roughly the same regardless of size.
  • New construction and teardowns. A new build next to a 1960s ranch can differ by $100 or more per foot for reasons the metric cannot see.
  • Implied value is not an appraisal. It ignores condition, updates, garage, views and lot size. Lenders and appraisers make line-item adjustments for each of those.

Use the result as a screen: a listing 10% above its comps deserves a clear reason, and one 10% below deserves a closer inspection. For an offer price or a tax appeal, get a comparative market analysis from an agent or a licensed appraisal.

Frequently Asked Questions

Common questions about the Price Per Square Foot Calculator - Real Estate Comparison

Divide the property's price by its finished square footage. A $400,000 home with 2,000 square feet costs $200 per square foot. Use the listing price for comparing homes you're considering, or the actual sale price when analyzing what comparable homes truly sold for. Always use the same square-footage standard, ideally finished above-grade living space, so your comparisons stay consistent across properties.

Sources & References

Mortgages and home-buying

Consumer guidance on mortgages, closing costs, and home financing.
→Source: Consumer Financial Protection Bureau (CFPB)

Explore More Tools

Explore these related tools for your next step.

real-estate

Rent Per Square Foot Calculator

Calculate rent per square foot, effective monthly cost, annualized rent per square foot, concessions, fees, and market rent differences for apartments and leases.

Try it now
real-estate

Listing Description Quality Checker

Listing Description Quality Checker helps review real estate inputs locally with private local analysis, browser-side previews, and optional cached model upgrades.

Try it now
real-estate

Rental Application Risk Note Analyzer

Rental Application Risk Note Analyzer helps review real estate inputs locally with private local analysis, browser-side previews, and optional cached model upgrades.

Try it now
real-estate

Home Inspection Note Summarizer

Home Inspection Note Summarizer helps review real estate inputs locally with private local analysis, browser-side previews, and optional cached model upgrades.

Try it now
real-estate

Property Photo Alt Text Preview

Property Photo Alt Text Preview helps review real estate inputs locally with private local analysis, browser-side previews, and optional cached model upgrades.

Try it now
real-estate

Lease Clause Plain English Summarizer

Lease Clause Plain English Summarizer helps review real estate inputs locally with private local analysis, browser-side previews, and optional cached model upgrades.

Try it now