How do I calculate square footage from a floor plan photo?

1) Upload your floor plan into the tool, 2) Calibrate scale by drawing a line over a known dimension (like a standard 36-inch / 3-foot doorway or drawing scale bar), and 3) Select the Polygon tool and click around the corners of the room. The tool computes square footage (ft²) and square meters (m²) instantly.

What standard reference objects work on architectural blueprints?

Interior residential doors are almost universally 32 or 36 inches (81 to 91 cm) wide. Kitchen counter depths are typically 24 inches (61 cm). You can also use printed graphic scale bars (e.g., 1 inch = 10 feet or 1:100 scale).

Can I measure irregular or non-rectangular room areas?

Yes! The multi-point Polygon tool supports any arbitrary shape (L-shaped rooms, curved alcoves, bay windows, and triangular spaces) using Gauss's Shoelace formula to compute precise surface area.

📐 Instant Floor Plan & Blueprint Area Takeoff

Measure Area & Square Footage on Images

Calculate square feet (ft²), square meters (m²), and perimeters on house plans, satellite land photos, and construction blueprints.

ImageMeasure

Architectural Floorplan

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Corner:

Canvas: Zoom with Wheel|Outside / Shift: Page Scroll

How to Calculate Square Footage from a Blueprint or Floor Plan

Import Floor Plan

Drag & drop your architectural drawing, PNG sketch, or scanned PDF page into the workspace.

Set Known Scale

Use the Scale tool to trace a known dimension (e.g., standard door width 3.0 ft / 914 mm or 10-foot scale bar).

Trace Room Perimeters

Select Polygon or Rectangle tool and click room corners. The tool calculates exact square footage (ft²) and square meters (m²).

Precision Shoelace Polygon Area Algorithm

The mathematical engine calculates non-convex and irregular polygon areas using Gauss's area formula (Shoelace theorem):

Area = 0.5 × | ∑ (x_i × y_(i+1) - x_(i+1) × y_i) | × (ScaleFactor)²

Ideal For Contractors, Real Estate & DIY Flooring

🏡 Flooring & Tile Estimators

Measure square footage to calculate exact tile, carpet, or hardwood lumber material quantities with waste margins.

📋 Real Estate Appraisers & Agents

Verify living area, bedroom dimensions, and total heated square footage before listing properties on MLS.

🎨 Painters & Drywall Contractors

Measure wall surface areas and ceiling square footage to provide fast, accurate client bids and paint gallon estimates.

🌿 Landscapers & Turf Installers

Calculate lawn square yardage, driveway asphalt area, and patio paver dimensions from drone and aerial satellite photos.