How Napkin Plan works

The complete guide to getting an accurate "will it fit?" answer — from uploading your first floor plan to collaborating with the people you share it with in real time.

On this page
  1. Uploading a floor plan
  2. Calibrating the scale (the important part)
  3. Placing, rotating, and deleting furniture
  4. Custom furniture
  5. The measure tool
  6. Printing your plan
  7. What is a workspace?
  8. Workspaces and real-time collaboration
  9. Multiple plans and multi-level homes
  10. The iPhone & iPad app
  11. FAQ — account, billing, and data

1. Uploading a floor plan

Napkin Plan works with any image of a floor plan: a screenshot from an apartment listing, a photo of the plan posted in the leasing office, a scan of architect drawings, or a photo of your own hand-drawn sketch. JPG and PNG both work. If your plan is a PDF, take a screenshot of the page and upload that.

For best results:

2. Calibrating the scale (the important part)

Calibration is what turns your picture into a measurable plan. You tell Napkin Plan one real-world distance, and it derives everything else. The flow:

  1. Click Calibrate (it also opens automatically on a new upload).
  2. Enter a distance you know, in your own units — feet and inches, or metres and centimetres. Set which you use from the account menu; a plan marked 451 is entered as 0 m 451 cm.
  3. Click the two endpoints of that distance on the plan.

Everything depends on the quality of that one reference, so choose it well:

ReferenceReliabilityNotes
A printed room dimension (e.g. "12'-6" × 10'" or "3.80 × 3.05 m")BestUse the longest labeled dimension you can — longer references reduce click error
Overall apartment width/lengthBestOften listed in the floor plan or listing text
A bathtub (60" / 152 cm long)GoodA standard tub is 60 inches (152 cm); easy to spot
An interior door (30–36" / 76–91 cm wide)OKWidths vary; use 32" (81 cm) as a typical guess for apartment interiors. UK internal doors are usually 762 or 838 mm; most of Europe, 800 mm
Kitchen counter depth (24" / 60 cm)Last resortShort reference = bigger relative error
Accuracy tip: after calibrating, sanity-check with the measure tool — measure a second dimension you know (another labeled room, a different door). If it reads within an inch or two, your calibration is solid. If it's off, recalibrate with a longer reference line.

Each floor plan stores its own scale, so a workspace with several plans can mix listing screenshots at different sizes without conflict. New to floor plan notation? Our guide to reading floor plans covers symbols and dimension formats.

3. Placing, rotating, and deleting furniture

Pick a piece from the categorized dropdown — beds, sofas, desks, dining, dressers, chairs, and more, all at standard real-world dimensions — and click Add Furniture. The piece appears on your canvas, sized to your calibrated scale. (Curious what the standard sizes are? See our furniture dimensions cheat sheet.)

4. Custom furniture

For pieces not in the catalog — your specific sectional, a vintage armoire, a piano — open the Furniture Catalog Manager and add a custom item: choose a category, name it, and enter its width and depth in your chosen units (check "circular" for round pieces, where width = diameter). Custom items appear in the dropdown with a ★ and sync to your account, so they're available on every plan and device. The free plan includes 3 custom pieces; Pro removes the limit.

5. The measure tool

Toggle Measure, then click any two points — the distance appears in your chosen units, using your calibrated scale. Use it to check walkway widths (aim for 30–36 inches (76–91 cm) on main paths), clearance in front of dressers and closets, and whether the TV-to-sofa distance lands in the comfortable 1.5–2.5× screen-diagonal range. Click again to start the next measurement.

Saving measurements (Pro). After a measurement, tap Save on the measure bar to keep it on the plan. Saved measurements stay on the floor you drew them on, and their lengths follow your calibration, so if you recalibrate they update. Click a saved measurement to delete it, and use Show measurements in Tools to hide or show them on this device.

6. Printing your plan

Choose 🖨️ Print in Tools to get a PDF sized to the page, with your furniture exactly where you put it. Pick how much detail you want: just the plan, or every piece numbered on the plan with a list beside it giving its name — and its width and depth, if you like. Tick Include measurements to print your saved measurements too. Print it, save it, or send it to someone: handy for walking a space with a tape measure, showing a partner what you're thinking, or handing movers a page that says where the sofa goes.

Printing is part of Pro.

7. What is a workspace?

A workspace is where your plans live. Every floor plan you upload belongs to one, and a workspace is also the thing you share: invite someone into it and they see every plan inside it — the same plans, kept in sync, not a copy.

Most people only ever need one. A second workspace is for when a different group of people should see a different set of plans. For example:

You do NOT need a separate workspace for each community or apartment you're comparing. Put them all as plans in one workspace. Comparing places is exactly what multiple plans are for — one plan per candidate, side by side, with your furniture in each (see Multiple plans). Splitting them across workspaces just makes you switch back and forth.

Give a workspace a name that says which home it is, so everyone you invite knows at a glance. Free accounts get 1 workspace; Pro gets up to 4.

8. Workspaces and real-time collaboration

Your plans live inside a workspace — share it with a partner, a roommate, or a parent you're helping move and you both see the same plans, live. When someone drags a piece, everyone else watching the plan sees it move and the piece locks against simultaneous edits. Members can be editors (full layout control) or viewers (look, don't touch). The free plan includes 2 workspace members; Pro raises it to 4.

It's the answer to the eternal "what if the sofa faced the window?" debate — you can both look at the same live plan from different couches (or different cities).

9. Multiple plans and multi-level homes

Each floor plan is independent, with its own image, scale, and furniture. Pro users can keep up to 10 at once — the killer use case is apartment comparison: one plan per candidate apartment, your same furniture arranged in each, decided side by side. Multi-level plans (Pro) add floors within one plan, for townhouses, duplexes, and lofts — switch levels with one click while keeping everything in one place.

10. The iPhone & iPad app

Napkin Plan is a universal app that runs natively on both iPhone and iPad — same plans, same workspace, same real-time sync, with touch-first controls that make dragging furniture feel especially natural. You get the full editing experience on both, and iPhone is especially handy for checking measurements while you are standing in the room. An App Store Pro subscription automatically includes web Pro, so you never pay twice.

Download Napkin Plan on the App Store

11. FAQ — account, billing, and data

What does the free plan include?

One floor plan, the full furniture catalog plus 3 custom pieces, the measure and calibration tools, real-time collaboration with 2 workspace members, and sync across devices. It's genuinely free — no credit card, no trial countdown.

What does Pro add, and what does it cost?

Pro is $3.99 USD/month or $31.99 USD/year (about 33% off). It adds up to 10 concurrent floor plans, multi-level plans, unlimited custom furniture, 4 workspace members, and removes ads. There's a 7-day free trial and you can cancel anytime from your billing portal.

How do I cancel or change my subscription?

Open the billing portal from inside the app (your account menu → Manage Subscription). You can switch monthly/annual, update your card, or cancel — changes take effect at the end of the current billing period, and your plans remain accessible on the free tier afterward.

Where is my data stored? Is it private?

Floor plan images and layout data are stored encrypted in our cloud (AWS) and are only accessible to you and the workspace members you invite. Images are never public — they're served through expiring private links. See our privacy policy for details.

Does it work offline?

Your most recent data is cached locally, so you can view and edit during brief disconnections; changes sync when you're back online. For extended offline use (e.g. a basement apartment viewing with no signal), the iPhone and iPad app handles it most gracefully.

I found a bug / I have a feature request.

We read everything: hello@napkinplan.app.

Ready to try it?

Upload a floor plan and find out if it fits — free, no credit card, 30 seconds to start.

Open Napkin Plan →