How do I measure distance or area on a drawing?

Load a PDF or image, set the scale using a long dimension written on the drawing (such as an overall dimension), then click on the drawing in length or floor-area mode. The real-world length, area, and wall area are calculated automatically in mm, cm, m, ft, or in (areas in m² or ft²).

Does it support multi-page PDFs?

Yes. When you load a multi-page PDF, a page switcher appears and each page keeps its own scale and measurement results.

Are my uploaded drawings sent to a server?

No. Loading, measuring, and saving all happen inside your browser (in on-device IndexedDB). Your drawings and measurement data are never sent to an external server.

Yes, the web tool is free to use. No installation is required — it runs entirely in your browser.

Is there an app for iPhone, iPad, or Mac?

Yes. Zumen ("Zumen - PDF Drawing Measure" on the App Store) is one app for iPhone, iPad, and Mac, with a magnifier loupe, Apple Pencil, paper-drawing scanning and straightening, and quantity tables (CSV, Excel). Setting the scale and measuring lengths are free; floor area and more are in Pro, a one-time purchase with a 7-day free trial. The .data project file is shared with the web tool.

Free PDF Measuring Tool Online – Measure Length & Area on Drawings

⑤ Furniture layout (rectangle)

Enter width and depth to place a scaled rectangle over the drawing. Drag to move; use the round handle to rotate (Shift = 15°). Shift-click to select multiple and move them together.

Width × Depth (mm)

Features you'd like

These don't exist yet. Tap the ones you want (as many as you like); the votes help decide what to build next. Only the feature names are counted. Drawings and measurements are never sent.

Free PDF measuring tool for length and area on drawings and floor plans

This free online PDF measuring tool loads a PDF or image drawing in your browser and lets you measure distance (length), floor area, and wall area — an area calculator for floor plans, site plans, and blueprints. Just match the scale using a known dimension on the drawing, and it converts the distance between two clicked points, or the area of a polygon you draw around a room, into real-world units — metric (m, m²) or imperial (ft, ft²), so you can get the square footage of a room straight from a floor plan PDF. No installation is needed and everything runs on your device, so your drawings are never uploaded.

Main features

Load PDF & images (multi-page PDF supported / drag & drop)
Page rotation (90° left or right, per page; kept in the PDF export)
Scale calibration (set horizontal and vertical separately, with an estimated accuracy)
Floor area measurement (polygon, m² or ft², multiple)
Length measurement (polyline, multiple / Shift for 15° snapping)
Wall area calculation (total length × height)
Metric and imperial units: mm, cm, m, ft, in (type feet-inches such as 12'-6")
Furniture layout (place, move and rotate rectangles to scale)
Point notes (annotations): add and move
Auto-save of work in progress (saved on device, restored next time)
Export to PDF, or save and resume your work as a .data file

How to use (3 easy steps)

Load a drawing (PDF / image)
Set the scale using a long dimension on the drawing
Measure length and area

For a fuller introduction, see the Drawing Measure product page. On iPhone, iPad, and Mac, the Zumen app adds a magnifier loupe, Apple Pencil, and paper-drawing scanning (the .data project file is shared). More tools are available at SoNice!.