Van conversion without weight guesswork.

Plan your layout in 2D, see it live in 3D, and get instant analysis of axle loads, center of gravity, and tilt risk. Perfect for self-built furniture with real build methods and material — your technical edge for inspection approval.

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Two things no one else combines

The most common reason a vehicle inspection fails isn't careless building — it's weight planning that only starts after the conversion is finished. That's why VanLogic combines two things no other tool offers together: one of the most detailed self-build environments for camper furniture — with eight real build methods, free material choice for the carcass, panelling, and fronts, and multi-part assemblies — and automatic weight calculation that turns exactly this data into real-time axle load, center of gravity, and collisions with the real vehicle structure. You're not just planning what your build looks like — you know from the very first click how it'll behave on the scale.

Read our blog. What's important for van conversions? What are the dangers? How can you avoid them?

Guide

Camper Floor Plan Planning: The Ultimate Guide to Your Van Conversion

Reading time: approx. 18 minutes

From your first vehicle click to a finished inspection report: this guide uses real screenshots from the app to show you how to plan your floor plan, avoid collisions with the vehicle structure, keep weight and centre of gravity in view live, and choose the right build method.

Read the guide

Sprinter & Ducato: Calculating Payload and Weight the Right Way

Reading time: approx. 6 minutes

Most campervan builders make the same mistake: they start building without knowing how heavy their van will eventually be. Months later they're at the inspection — and the scale shows a number they didn't expect. This article shows you how to keep the weight of your Sprinter or Ducato build under control from the start. Not after the build. Before.

Read full article

Van Conversion and Technical Inspection: What You Need to Know

Reading time: approx. 6 minutes

For many self-builders, the vehicle inspection is the most nerve-wracking part of the whole project. Not because it's so difficult — but because most people don't know exactly what gets checked. And a failed inspection is expensive: modifications, a second appointment, lost time. This article explains what is actually checked at the inspection, what role weight plays in that process — and how to prepare so you pass first time.

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Centre of Gravity in a Campervan: Why Your Van Sways in Corners — and What to Do About It

Reading time: approx. 5 minutes

Anyone who drives their fully converted van on the motorway for the first time sometimes gets an unpleasant surprise: the van feels different than before. Slower to respond in corners, more sensitive to crosswinds, a slight sway during quick lane changes. This is not imagination. It's physics. The centre of gravity of your vehicle has changed — and that directly affects how the van behaves on the road.

Read full article

VanLogic Physics Lab

Use the real app logic directly in your browser with our web app

Real calculation, live in your browser.

What you see on the left (this is not an image) is the **real VanLogic engine**. We use the same code as in the mobile app with the same features. Test it now! You can try everything here!

  • Real-time axle load calculation
  • Dynamic center of gravity analysis
  • Collision checks against the real vehicle structure
  • Cavity detection for DIY furniture
  • Automatic weight analysis instead of guesswork
Unlock full range of functions

Your web project is currently only saved locally. For permanent access, get the mobile app.

Some Pro features are already active here in the web version, but will only arrive in the app stores with the next update.

The app also has a "Test Mode" where you can try every Pro feature for a limited time. More details in the app's Detailed Help.

Physics & Safety

"Solve the most dangerous problem first."

Warnings for high center of gravity (CoG) or critical side tilt risk.

Physik

2D Editor

"It's child's play to use."

Easy drag & drop moving with instant impact on all loads.

Editor

Materials

"We are precise down to the detail."

Weight calculation based on material density (kg/m³) and individual dimensions.

Material

Unit Switch

"We can go global & technical."

Seamless switching between metric (mm/kg) and imperial (in/lbs) systems.

Switch

Result & Payload

"Your goal: A legal, safe van."

Monitor the total limit and axle load distribution in real-time during loading.

Result

Inspection / Report

"Facts that convince every inspector."

Generate a PDF with all technical data and tank scenarios at the touch of a button.

PDF

Fair Testing.

(All Pro features – except export/import – can be tried for free in the Free version.)

Free

0€
  • Accurate basic 2D floor planning
  • Vehicle database of all common types (Ducato, Sprinter, Crafter, Transit, T5/T6…) - Templates with real dimensions
  • Vehicle structures like wheel wells, roof tapers, sliding doors with collision alerts
  • Instant weight & axle load calculation
  • Instant center of gravity / tipping risk
  • Warning messages for axle loads & limits
  • Limited material/component selection
  • Limited DIY construction methods
  • No internet connection required, plan everything offline
  • Sandbox mode: try all Pro features for as long as you like – your plan isn't saved here*
  • Share your build: send your plan, build stats & technical data as image/PDF/text
Recommended for builders

Pro

Subscription or one-time purchase
  • Full material and component database
  • Physics analysis: Center of gravity & tipping values
  • Custom materials/components & categories with own weight/density data
  • Object duplication
  • For DIY: all types of construction methods, such as slanted boxes, frames...
  • For DIY: material thickness, shelves, components selectable (affects weight)
  • Export/Import of your projects - unlimited projects
  • Technical inspection limits & warnings
  • Manual dimensions (mm/inch)
  • PDF Export & material list
  • Legal payload check
  • Tank simulation: Full vs. Empty
  • 3D preview of your complete build
  • Assemblies: group multiple objects into one piece of furniture
  • Build templates: 8 ready-made floor plans for your vehicle*
  • Assembly template library: 21 ready-made furniture assemblies*
  • 3D X-ray view: see through furniture*
  • 3D exploded view: assemblies broken down into individual parts*

Download now for your smartphone/tablet

* These features are already fully developed and will arrive in one of the next app updates.

Support & Feedback

We are constantly improving the app and rely on your feedback to do so. Write to us!

Note If you need help with the app: Leaving a review without contacting us first when an issue occurs is not helpful for further development.
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