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Plan your cargo trailer camper in 3D.
Vanometry is a free, browser-based 3D layout planner for cargo trailer camper conversions. Pick an enclosed trailer from 6×10 to 8.5×24, or enter the numbers off your own tape measure, and lay out the interior with real components: bed, cabinets, fridge, power. Everything is to scale, snaps to a 1-inch grid, and cannot overlap.
No account needed. Your design autosaves in this browser.
The 7×14 in section, from the template's real dimensions.
The templates
| MODEL | BARE INTERIOR L × W × H | PAYLOAD |
|---|---|---|
| 6×10 cargo trailer | 135 × 69 × 75″ (343 × 175 × 191 cm) | 1,790 lb |
| 6×12 cargo trailer | 159 × 69 × 75″ (404 × 175 × 191 cm) | 5,300 lb |
| 7×12 cargo trailer | 161 × 81 × 78″ (409 × 206 × 198 cm) | 5,050 lb |
| 7×14 cargo trailer | 185 × 81 × 78″ (470 × 206 × 198 cm) | 4,900 lb |
| 7×16 cargo trailer | 209 × 81 × 78″ (531 × 206 × 198 cm) | 4,750 lb |
| 8.5×16 cargo trailer | 213 × 97 × 78″ (541 × 246 × 198 cm) | 4,400 lb |
| 8.5×20 cargo trailer | 261 × 97 × 78″ (663 × 246 × 198 cm) | 3,800 lb |
| 8.5×24 cargo trailer | 309 × 97 × 78″ (785 × 246 × 198 cm) | 3,400 lb |
Trailers are sold by exterior footprint, so the dimensions here are the bare interior: wall construction takes 2 to 4 inches from the nominal width, and a 7-foot trailer runs about 82 inches inside. The planner accounts for insulation and paneling when it derives the finished interior, and you can replace any number with your own measurements. Payload figures are typical ratings for each size and vary by axle package.
What to know
Sold by the outside
A cargo trailer is advertised by its exterior footprint, and the interior is smaller than the name suggests: a nominal 7×14 runs about 81 inches wide inside. The templates state the bare interior, so what you plan against is the space you actually have. Most enclosed trailers have a V-nose, and the templates model it: about two extra feet of floor at the centerline, tapering to a point.
A simple box
A trailer has flat walls and no cab or engine to plan around, so the whole floor is buildable. The V-nose is the one shape to plan: the floor between its angled walls is usable, and the angled walls hold cabinets, windows, and doors like the straight ones. Place your own walls, doors, and windows where the build needs them, and the layout works from a blank box.
Weight is the tow limit
Each template carries a payload figure for its size. With Pro you see the added weight of everything you place against it while you plan, and the same total is what your tow vehicle has to be rated to pull.
Common questions
Which trailer sizes are in the planner?+
6×10, 6×12, 7×12, 7×14, 7×16, 8.5×16, 8.5×20, and 8.5×24, each with a V-nose you can turn off for a flat front. If yours is a different size, enter the interior length, width, and height from your own tape measure, and the grid, snapping, and payload math follow your numbers.
Why is the interior smaller than the listed size?+
Trailers are sold by exterior footprint. Wall framing and paneling take 2 to 4 inches from the nominal width, and interior height varies by model. The templates state the bare interior from typical builds, and measuring your own trailer is always the better path. The box length runs 3 inches under the nominal figure. The V-nose adds back 18 to 24 inches at the centerline.
Can I share the design?+
Every design can become a public link. Anyone you send it to can orbit the build in 3D and walk it in first person, in the browser, with no install and no account.
Is it free?+
Yes. The editor, the parts list, share links, and the blueprint download are free with no account required. There is a paid tier, Vanometry Pro, for cost tracking, payload math, and exports once a build gets real. See the pricing page for the full split.
CHOOSING YOUR VEHICLE
Is this the right vehicle for your build?
Explore the benefits and tradeoffs, or browse all conversion guides.
INTERIOR DIMENSIONSCargo trailers
Plan it before you build it.
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