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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

1. 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.
2. Upload to MeasureFloorPlan.com. Drag the file in or click to browse. The image loads in your browser. Nothing is sent to a server.
3. Trace the perimeter. Click around the exterior of the above-grade living area. Each click places a vertex. Close the polygon by double-clicking.
4. Set scale. Click two points along any wall where you know the real-world length. Type that measurement. The tool recalculates the area instantly.
5. 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.