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Upload any floor plan image and get accurate square footage in under 2 minutes. Set the scale from one known wall, trace each room, and get an accurate GLA total consistent with ANSI Z765 methodology. No software to install — works in any browser. $4.99 per measurement.
Works with floor plans from CubiCasa, Matterport, iGUIDE, Apex Sketch, architect drawings, or any photo of a to-scale sketch.
Works with any to-scale floor plan — builder plans, MLS listings, CubiCasa or Matterport exports, or a phone photo of a paper sketch.
Gross Living Area (GLA) is the standard measure of residential square footage used by licensed appraisers under ANSI Z765-2021. It counts only finished, above-grade, heated and cooled space — measured from exterior walls.
GLA is what determines comparable sales adjustments, listing accuracy, and lender value. Finished basements, garages, and unheated porches are measured separately and do not count toward GLA regardless of how finished they are.
Upload your floor plan image, set the scale by tracing a known wall length, then click to trace each room. The tool calculates square footage automatically as you go. You get a running total and can add multiple areas for multi-story homes.
$4.99 for one measurement. That unlocks your result, lets you export a PDF, and gives you 24 hours of unlimited additional measurements on the same floor plans if you have more to check. One-time payment, no subscription.
JPG, PNG, HEIC, or any image export of a PDF floor plan. As long as the floor plan is visible as an image, you can upload and trace it. PDFs are automatically rendered to an image on upload.
The tool measures gross living area (GLA) by tracing the exterior perimeter of finished above-grade space, consistent with ANSI Z765-2021 methodology used in residential appraisal. You control which areas to include, so below-grade space can be measured separately.
Accuracy depends on two things: the quality of your floor plan and how precisely you set the scale. For a professional to-scale floor plan from CubiCasa, Matterport, or iGUIDE, you can expect results within 1-2% of a field measurement. Hand-drawn or rough sketches will have more error.
Real estate appraisers verifying GLA from scanned sketches, agents checking listing square footage before it goes live, property managers calculating usable area from as-built drawings, and homeowners measuring rooms for renovation planning.
No. You only need one known measurement — any wall where you know the real-world length. Set that as your scale reference and the tool calculates all other dimensions from that single input.
Yes. You can add multiple separate polygon areas — one for each floor. Each polygon is measured independently and all areas are summed in the total. Measure the main floor, upper floor, and garage separately to keep above-grade and below-grade area organized.
The tool measures what is in the image. If the floor plan is not drawn to a consistent scale — for example a rough hand sketch where proportions are eyeballed — the result will reflect those proportions, not the actual structure. For best results, use a to-scale floor plan from a scanner, professional software, or an architect drawing.
Yes. The tool is built specifically for real estate appraisers who need to verify or recalculate GLA from floor plan sketches or scans. It is faster than manually re-sketching and provides a reliable second check. The appraiser is responsible for confirming the input floor plan is accurate and to scale.
The tool is optimized for desktop and laptop use — precise point placement works best with a mouse or trackpad. It will load on a tablet but touch-based tracing on small screens is less accurate. Best results on a desktop browser.
The tool shows your square footage on screen once you unlock your results. You can screenshot the summary or copy the values into your own report.
Measure from a Photo
Use a photo of any floor plan
Appraisal Sketch Measurement
Verify GLA from any appraisal sketch
CubiCasa Floor Plans
Get GLA from CubiCasa exports
Matterport Floor Plans
Measure from Matterport exports
iGUIDE Floor Plans
Get square footage from iGUIDE
Apex Sketch Floor Plans
Export and measure Apex sketches
Condo Floor Plans
Interior condo unit measurement
ANSI Z765 Guide
ANSI-compliant GLA methodology
GLA vs Total Sq Ft
What counts and what doesn't
How to Set Scale
The most important step, explained
For Appraisers
Verify GLA from scanned sketches
For Agents
Catch sqft errors before listing
MeasureFloorPlan.com — online floor plan measurement, $4.99 per measurement