# How to measure a 3D model in the browser or in VR

Source: https://0xr.space/m/how/measure-a-3d-model-in-the-browser-or-vr  
Published 2026-10-10, updated 2026-10-20, by ZeroXR, the maker of Model Explorer (https://0xr.space/).

Open the model on 0xr.space, press Scale in the dock (it shows the current percentage), then Measure. Tap one point on the model, then a second: a line joins them and its length appears, like ~ 42 cm. A third tap starts a new measurement. It works with a mouse or a finger in a browser, on an Android phone in AR, and with a pinch in VR on Meta Quest.

The points land on the bounding box of the part you tap, not on its exact surface, which is why every reading has a ~; on a model of one part, that box is the whole model's. The length follows the scale on show, so measure at 1:1 Size to read real dimensions. Lengths are in centimetres and metres only. It is not a survey or CAD measuring tool.

## Steps

1. Open 0xr.space and open the model.
2. Press Scale in the dock, then 1:1 Size if you want real dimensions.
3. Press Measure. Tap the first point when it says Tap point, and the second when it says Tap next.
4. Read the length on the line. Tap again to start over, or press Measure to stop.

## Questions

### Why does every length start with ~?

The points are taken on the tapped part's bounding box, not its surface, so the number is an estimate.

### Can it show inches?

No. Lengths are shown in centimetres and metres only.

### Does it measure the model or the real object?

The model as it stands. At 50% scale a 1 m edge reads about 50 cm, so press 1:1 Size first, and check the file's units are right.

### Is my file uploaded?

No. It is read on the device, and nothing is sent to a server unless you create a share link yourself.

## Related guides

- [How to view a 3D model at real size](https://0xr.space/m/how/view-a-3d-model-at-real-size-1-to-1)
- [How to check a 3D print's real size before printing it](https://0xr.space/m/how/check-3d-print-size-before-printing)
- [How to play a GLB animation in VR or AR](https://0xr.space/m/how/play-glb-animation-in-vr-or-ar)
- [How to hide or delete parts of a 3D model](https://0xr.space/m/how/hide-or-delete-parts-of-a-3d-model)
- [How to clean up a 3D mesh: smooth, simplify and mirror](https://0xr.space/m/how/clean-up-a-3d-mesh-smooth-simplify-mirror)
- [How to cut through a 3D model with a section plane](https://0xr.space/m/how/cut-through-a-3d-model-with-a-section-plane)