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Floor Plan Measurement Tool — No Download Required

MeasureFloorPlan.com runs entirely in your browser. Upload any floor plan — PDF, JPG, PNG, or HEIC — trace the perimeter, set one wall length, and get accurate square footage in under two minutes. No app, no plugin, no installation.

What the tool does

• Upload any floor plan. PDF, JPG, PNG, and HEIC all supported. No conversion needed. PDFs are rendered automatically on upload.
• Trace any shape. Click around the perimeter of each room or area. The tool calculates polygon area in real time as you place points.
• Set scale from one known wall. You only need a single known dimension. Click two points on that wall, enter the length, and all other measurements scale accordingly.
• Multiple areas per session. Trace the main floor, second floor, and garage as separate polygons. Each is measured independently and all are summed in the total.
• PDF export. Export your result with the traced floor plan image and GLA total as a PDF document — useful for documentation, appraisal review, or contractor bids.
• Saved projects. Save your traced floor plans to your account and return to them later. Associate measurements with a property address for easy organization.

Who it is for

• Appraisers. Verify GLA from scanned appraisal sketches, CubiCasa exports, or architect drawings. ANSI Z765-consistent workflow.
• Real estate agents. Check listing square footage before it goes live. Catch data entry errors before they become disclosure problems.
• Investors. Measure floor plans across multiple properties quickly without buying expensive desktop software.
• Homebuyers. Verify the listed square footage of a property before making an offer.
• Property managers. Calculate usable area from as-built drawings for leasing or renovation planning.

How it works technically

The tool runs entirely in your browser using JavaScript. PDF rendering uses PDF.js — the same library Firefox uses for PDF viewing. Image processing and polygon area calculation happen locally. There is no server call during measurement, which means it works offline after the initial page load and your floor plan never leaves your device.

This architecture is intentional. Floor plans for real estate transactions are sensitive documents. Processing them on-device means no third party receives your property data.

How accurate is it?

Accuracy depends on two factors: 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 variance. See how accurate are floor plan measurements for a full breakdown.