Drawing Measure · Free web tool · Zumen app for iPhone, iPad & Mac

Measure length & area from PDF & image drawings

Drawing Measure measures length, floor area, and wall area on PDF and image drawings in real-world units — match the scale using one known dimension, and that's it. Overlay furniture rectangles and notes too. Use the free web tool in your browser or the Zumen app for iPhone, iPad, and Mac; either way, drawings are processed on your device.

Last updated: 2026-10-13

Load a drawing,
click to measure

PDF & images

Everything runs
inside your browser

No upload · No sign-up

Length, area &
wall area, to scale

mm/cm/m · ft/in

Furniture, notes &
auto-save

Resume where you left off

Open the tool (free, no sign-up)

Runs in your browser · No install · Drawings stay on your device

Measure in 3 steps

1

Load a drawing

Drag & drop a PDF or image. Multi-page PDFs are supported.

2

Match the scale

Enter the longest dimension written on the drawing, then click both of its ends to set the scale. The tool also shows how accurate the scale is.

3

Measure length & area

Click to measure length, floor area, and wall area. Overlay furniture rectangles and notes too.

Key features

  • Scale calibration — set horizontal and vertical separately, correcting fax/scan distortion. The tool shows an estimated accuracy (high / medium / low) and suggests a longer dimension when it is low.
  • Metric & imperial units — mm, cm, m, ft, or in. Type feet-inches such as 12'-6" straight from the drawing.
  • Length measurement — measure distance with a polyline. Shift snaps to 15°; double-click to finish.
  • Zoom — zoom the drawing with the mouse wheel or a two-finger pinch on a trackpad, phone, or tablet.
  • Page rotation — turn a sideways page 90° left or right, page by page; the PDF export keeps the rotation.
  • Floor area — draw a polygon and read the area in m² or ft². Register multiple areas.
  • Wall area — length × height, with a per-length height you can set individually.
  • Furniture layout (rectangles) — enter width and depth to place, move, and rotate scaled rectangles.
  • Annotations (notes) — add and move notes at any point on the drawing.
  • Auto-save & export — work is auto-saved on your device. Export to PDF or save/restore a project file (.data).

Great for

Planning DIY and renovation layouts, pulling dimensions off a PDF drawing, estimating floor and wall areas of a room, and testing furniture layouts. Because images never leave your device, it is safe for company drawings and private floor plans alike.

Open the tool (free, no sign-up)

Runs in your browser · No install · Drawings stay on your device

The Zumen app for iPhone, iPad & Mac

Zumen (“Zumen - PDF Drawing Measure” on the App Store) is the app version for iPhone, iPad, and Mac. It works the same way as the web tool: match one dimension written on the drawing and measure lengths and areas. The .data project file is shared, so you can open a file saved in the web tool in the app and keep measuring (and vice versa).

  • Magnifier loupe & Apple Pencil — press and hold to see the spot under your finger, and double-tap Apple Pencil to finish.
  • Three ways to set the scale — tap both ends of a dimension, pick the paper scale (such as 1:50), or outline a room whose area you know.
  • Scan & straighten paper drawings — capture a paper drawing with the iPhone or iPad camera, and straighten angled photos and faxes by matching the four corners.
  • Quantity table (CSV, Excel) & PDF export — list every length, area, and wall area. PDFs keep the original page size, so printed drawings stay to scale.

Setting the scale and measuring lengths are free. Floor area, wall area, furniture, notes, exports and more are in Pro, a one-time purchase with a 7-day free trial (no automatic charge). The free iPhone and iPad app shows ads.

Get the app (free download)

Download on the App Store

iPhone & iPad (iOS 18+) · Mac (macOS 15+) · Pro is a one-time purchase with a 7-day free trial

FAQ

QHow do I measure distance or area on a drawing?
A
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 metric (mm, cm, m) or imperial (ft, in) units.
QIs there an app for iPhone, iPad, or Mac?
A
Yes. Zumen ("Zumen - PDF Drawing Measure" on the App Store) is one app for iPhone, iPad, and Mac. Setting the scale and measuring lengths are free; floor area, wall area, exports and more are in Pro, a one-time purchase. Pro has a 7-day free trial with no automatic charge, and one purchase works on all your devices with the same Apple Account.
QWhat is the difference between the web tool and the app?
A
The web tool is free and runs in your browser, including floor area and furniture. The app adds a magnifier loupe and Apple Pencil for precise points, scanning and straightening paper drawings, setting the scale from a paper scale (such as 1:50) or from a room of known area, perimeter, and quantity tables (CSV, Excel). The .data project file is shared: open a file saved in the web tool in the app and continue, and vice versa.
QAre my drawings sent to a server?
A
No. The web tool loads, measures, and saves everything inside your browser (on-device IndexedDB), and the app keeps drawings and measurements only on your device and in iCloud Drive if you choose it. The free iPhone and iPad app shows ads.
QDoes it support multi-page PDFs?
A
Yes. When you load a multi-page PDF, a page switcher appears and each page keeps its own scale and measurement results.
QIs it free?
A
The web tool is free with no install or sign-up. The app is a free download: setting the scale and measuring lengths are free, and Pro features such as floor area are a one-time purchase with a 7-day free trial.

Related guides

These articles walk through measuring lengths and areas on drawings, setting the scale, and converting units.

For image format conversion, try WebP Converter. and Image Tool+ as well.



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