Zumen - PDF Drawing Measure

Zumen measures lengths, floor areas and wall areas on PDF and image drawings. Enter one dimension printed on the drawing, tap its two ends, and the whole sheet becomes a ruler. For iPhone, iPad and Mac. Measurements are estimates and can differ from actual dimensions (see ABOUT ACCURACY). SET THE SCALE IN SECONDS Set horizontal and vertical scales separately for scanned or faxed drawings with uneven stretch. Zumen shows an estimated accuracy (±%) right after calibration and tells you how to improve it. For CAD PDFs, just pick the paper scale (such as 1:50). No printed scale, as on a real-estate listing? Outline a room of known size and enter its area. MEASURE LENGTHS Tap points to measure walls, runs and distances as a polyline. Each segment and the total are labeled on the drawing. Angle snapping in 15° steps. OUTLINE A ROOM TO MEASURE ITS AREA Tap the corners of a room to get its floor area. L-shaped and multiple rooms are fine, with a total. WALL AREA Multiply measured lengths by the ceiling height to get wall areas, per wall or all at once. QUANTITY TABLE (CSV, EXCEL) Export floor areas, lengths, wall areas and furniture sizes as a page-by-page list with totals, in CSV or Excel (.xlsx). FURNITURE AND NOTES Place furniture to scale by width and depth, move it by dragging, rotate in 15° steps. Pin notes anywhere on the drawing. LOUPE AND APPLE PENCIL Touch and hold for a magnifier loupe, so your finger never hides the point you are placing. Apple Pencil is supported, including double-tap to finish. SHARE A PDF THAT KEEPS ITS SCALE Export the drawing with your measurements as a PDF. Lines and text from the original PDF stay vector, and the page keeps its original size, so a 1:50 drawing still prints at 1:50. SCAN PAPER DRAWINGS Scan paper drawings with the iPhone or iPad camera, and straighten angled photos or faxes by matching the sheet's four corners. FILES • PDF (multi-page) and images (PNG, JPEG, HEIC, TIFF and more) • Open drawings from Files and iCloud Drive; your original files are never changed • Rotate pages in 90° steps; undo • Units: mm, cm, m, ft, in YOUR DRAWINGS STAY YOURS No account needed. Drawings and measurements are stored only on your device and in the iCloud Drive you choose, never on our servers. FREE • Open, rotate and zoom drawings • Set the scale (horizontal and vertical, or paper scale) with accuracy estimate • Measure lengths with the loupe, Apple Pencil and 15° snapping PRO (ONE-TIME PURCHASE) • Floor area (with perimeter) and wall area • Scale from a known area • Furniture and notes • Save your work as a project file (.data) and pick up later • Export PDF and quantity tables (CSV, Excel) • Scan paper drawings and straighten photos • No ads One purchase unlocks Pro on all your iPhone, iPad and Mac devices with the same Apple Account. Try every Pro feature free for 7 days first; the trial never turns into a charge. ABOUT ACCURACY Zumen calculates lengths and areas from the points you place on the drawing image, so measurements can include errors: • Point placement: when the dimension you used to set the scale spans 1,000 pixels on screen, a 1-pixel offset changes lengths by about 0.1% (about 1% at 100 pixels). Area errors are roughly twice the length error. • The drawing itself: scanned, faxed or photographed drawings may be stretched or skewed, and low-resolution images make line ends hard to pinpoint. To reduce errors: 1. Set the scale with the longest dimension printed on the drawing. 2. Zoom in before placing points (use the loupe when working with a finger). 3. After setting the scale, measure another printed dimension and confirm that it matches. Use measurements for planning and quoting. When exact dimensions matter, such as for design, construction or ordering materials, check them in CAD or other dedicated software using the original drawing data. The free version shows ads on iPhone and iPad.