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Plan your box truck conversion in 3D.
Vanometry is a free, browser-based 3D layout planner for box truck conversions. Pick a box from 12 to 26 feet, or enter the numbers off your own tape measure, and drag real components around the interior: beds, cabinets, fridges, power stations, walls. Everything is to scale, snaps to a 1-inch grid, and cannot overlap, so a layout that works on screen works in the truck.
No account needed. Your design autosaves in this browser.
The 16-foot box in section, from the template's real dimensions.
The templates
| MODEL | BARE INTERIOR L × W × H | PAYLOAD |
|---|---|---|
| 10 ft U-Haul | 119 × 75 × 73″ (302 × 191 × 185 cm) | 2,850 lb |
| 12 ft box truck | 144 × 92 × 85″ (366 × 234 × 216 cm) | 5,000 lb |
| 14 ft box truck | 168 × 92 × 88″ (427 × 234 × 224 cm) | 6,000 lb |
| 15 ft U-Haul | 174 × 92 × 86″ (442 × 234 × 218 cm) | 6,385 lb |
| 16 ft box truck | 192 × 92 × 90″ (488 × 234 × 229 cm) | 6,500 lb |
| 18 ft box truck | 216 × 92 × 92″ (549 × 234 × 234 cm) | 7,000 lb |
| 20 ft U-Haul | 233 × 92 × 85″ (592 × 234 × 216 cm) | 5,700 lb |
| 20 ft box truck | 240 × 97 × 96″ (610 × 246 × 244 cm) | 8,000 lb |
| 22 ft box truck | 263 × 97 × 97″ (668 × 246 × 246 cm) | 10,000 lb |
| 24 ft box truck | 287 × 97 × 100″ (729 × 246 × 254 cm) | 10,000 lb |
| 26 ft box truck | 312 × 97 × 102″ (792 × 246 × 259 cm) | 10,000 lb |
| 26 ft U-Haul | 314 × 97 × 99″ (798 × 246 × 251 cm) | 12,859 lb |
Dimensions are the bare interior from manufacturer and body-builder specs: a 96-inch-wide body runs about 92 inches inside, and the 102-inch bodies on the 20 and 26 footers run about 97. 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 ratings where published and estimates where not.
What to know
Flat walls, square corners
A box truck’s vertical walls and mostly square corners make panels and rectangular cabinetry easier to fit. Check the roof curve, posts, and rails on the actual body. Our smaller box-truck templates start at 92 inches wide inside, leaving room to plan a crosswise bed after accounting for finishes.
The U-Haul shelf is modeled
The 15, 20 and 26-foot U-Haul templates carry the raised shelf over the cab at its published height. Drag items onto it to plan storage or a sleeping platform, and lay out the flat floor below it as usual.
Tested against a real build
Mike, the founder, is about halfway through converting a 16-foot Isuzu NPR. He started Vanometry because the planning tools he could find were not worth the money. The demo is that build, a work in progress. See the demo build →
Common questions
Which box trucks are in the planner?+
12, 14, 16, 18, 20, and 26-foot boxes, plus the 15, 20 and 26-foot U-Haul trucks with their published inside dimensions and the shelf over the cab. If your box is different, enter your own interior length, width, and height, and the grid, snapping, and payload math follow your numbers.
Will the dimensions match my truck?+
The templates state the bare interior from body-builder specs, and real boxes vary by an inch or two. The best path is to measure your own box and enter the numbers. The templates are starting points.
Does it track weight?+
With Pro you see the added weight of everything you place against the truck’s payload rating while you plan. Box conversions get heavy, and most builds run out of payload before they run out of floor.
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 DIMENSIONSBox trucksU-Haul trucks
Plan it before you build it.
The layout is the cheapest part of the build to change. Get it right before you buy materials.
Start designing — freeLoads in seconds. Saves as you go. See Mike’s build in progress
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