Calculate Square Footage Online from a Floor Plan
MeasureFloorPlan.com is a browser-based tool that calculates square footage from any to-scale floor plan image or PDF. Here is how it works and when to use it.
The fastest way to calculate square footage from a floor plan
The traditional approaches: physical scale rulers, printed graph paper, or recalculating by hand. Are slow and error-prone. Digital floor plan measurement tools have made this much faster. MeasureFloorPlan.com is purpose-built for this exact job: upload a floor plan, trace the area, set one scale reference, and read the result.
The entire process takes under two minutes for a simple single-story home. Complex multi-story properties with separate per-floor plans take 5-10 minutes total.
Step-by-step: calculate square footage from a floor plan online
- Get your floor plan. JPG, PNG, HEIC, or PDF: any format works. CubiCasa, Matterport, iGUIDE, Apex Sketch, architect drawings, and MLS floor plans all upload directly.
- Upload to MeasureFloorPlan.com. Drag the file in or click to browse. The image loads in your browser. Nothing is sent to a server.
- Trace the perimeter. Click around the exterior of the above-grade living area. Each click places a vertex. Close the polygon by double-clicking.
- Set scale. Click two points along any wall where you know the real-world length. Type that measurement. The tool recalculates the area instantly.
- Read the result. Square footage appears in the sidebar. For multi-story homes, trace each floor separately and sum.
Who uses it
- Appraisers: verify GLA from CubiCasa and Matterport plans, double-check sketch calculations
- Real estate agents: catch square footage errors before listing, verify MLS square footage
- Homebuyers: independently verify square footage before making an offer
- Investors: quickly verify square footage on acquisition targets from floor plans
- Landlords: measure unit square footage accurately for lease pricing
- Homeowners: calculate square footage for renovation quotes, insurance verification, or tax assessment disputes
What makes it different from a simple square footage calculator
Basic square footage calculators ask you to enter length and width. That works for one rectangular room. It does not work for an L-shaped home, a two-story home with different footprints per floor, or any home with irregular geometry.
MeasureFloorPlan.com traces the actual floor plan shape. Any polygon, any number of vertices, any floor count. The result reflects the actual footprint, not an approximation based on rectangular inputs.
Pricing
MeasureFloorPlan.com runs entirely in your browser and costs $4.99 per measurement. One-time payment, no subscription. That unlocks your square footage result, a PDF export, and 24 hours of additional measurements if you need them.
Calculate square footage from your floor plan now
Upload your floor plan and trace square footage in any browser: no software required.
Start Measuring →Frequently Asked Questions
How do I calculate square footage from a floor plan online?
Upload the floor plan image or PDF, trace the exterior perimeter of the area you want to measure, set the scale from any labeled wall dimension, and the tool returns the calculated square footage instantly. The full workflow takes about two minutes.
What file types work?
JPG, PNG, HEIC, and PDF all work. For PDFs the first page is rendered. Higher resolution always traces more cleanly. Phone photos work as long as the floor plan is photographed flat (not at an angle).
How accurate is online floor plan measurement?
For a clean to-scale architect drawing or appraisal sketch, results are typically within 1 to 2 percent of a measured GLA. Hand sketches and angled phone photos vary more (5 to 10 percent). A longer scale reference (40-foot wall vs 3-foot door) improves accuracy.
Do I need an account to calculate online?
No account is required. Pay per measurement at $4.99, get the result instantly, and move on. There is no subscription and no signup.
Can I measure a multi-story home online?
Yes. Trace each floor as a separate polygon, set scale on each floor (the dimensions may differ slightly between floors), and the tool sums the polygons for total GLA.