# is distance in mm?
**URL:** https://discourse.paraview.org/t/is-distance-in-mm/7551
**Category:** ParaView Support
**Created:** [July 5, 2021, 1:39pm UTC](https://discourse.paraview.org/t/is-distance-in-mm/7551 "2021-07-05T13:39:37Z")
**Posts on this page:** 9
**Page:** 1
### Author:  [@Fun\_Mania](https://discourse.paraview.org/u/Fun_Mania)
#### Post date: [July 5, 2021, 1:39pm UTC](https://discourse.paraview.org/t/is-distance-in-mm/7551/1 "2021-07-05T13:39:37Z")
Hello guys,
I have to track the distance between two meshes. When I used Ruler option to measure distance it show “distance:0.22”. So is it mm ?
For reference, I didn’t use any transformation scales.
Thank you
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [July 5, 2021, 1:40pm UTC](https://discourse.paraview.org/t/is-distance-in-mm/7551/2 "2021-07-05T13:40:47Z")
It depends on the scale of your data. There is no units in ParaView.
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### Author:  [@Fun\_Mania](https://discourse.paraview.org/u/Fun_Mania)
#### Post date: [July 5, 2021, 1:45pm UTC](https://discourse.paraview.org/t/is-distance-in-mm/7551/3 "2021-07-05T13:45:02Z")
Thank you for the quick reply.
So any idea to know units? This is my mesh. White part is the distance.When I used transform filter it shows 1, 1, 1 in scale.
Thank you.
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [July 5, 2021, 1:46pm UTC](https://discourse.paraview.org/t/is-distance-in-mm/7551/4 "2021-07-05T13:46:55Z")
Once again, it depends on your dataset, do you know the units of your dataset ?
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### Author:  [@Fun\_Mania](https://discourse.paraview.org/u/Fun_Mania)
#### Post date: [July 5, 2021, 1:52pm UTC](https://discourse.paraview.org/t/is-distance-in-mm/7551/5 "2021-07-05T13:52:37Z")
Apologies, if I am misunderstanding your answer. I am using these meshes in LIGGGHTS . Units of my dataset in DEM are si units : For style _si_, these are the units:
- mass = kilograms
- distance = meters
- time = seconds
- energy = Joules
Are you talking about this unit?
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [July 5, 2021, 1:53pm UTC](https://discourse.paraview.org/t/is-distance-in-mm/7551/6 "2021-07-05T13:53:26Z")
yes, then the results of the ruler are in meters.
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### Author:  [@Fun\_Mania](https://discourse.paraview.org/u/Fun_Mania)
#### Post date: [July 5, 2021, 1:54pm UTC](https://discourse.paraview.org/t/is-distance-in-mm/7551/7 "2021-07-05T13:54:18Z")
Thank you so much.
I got it.
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### Author:  [@ChiaraYoung](https://discourse.paraview.org/u/ChiaraYoung)
#### Post date: [January 17, 2023, 2:05pm UTC](https://discourse.paraview.org/t/is-distance-in-mm/7551/8 "2023-01-17T14:05:19Z")
Is there a way to export the measure computed by the Ruler?
I have 100 timesteps and wanted to plot the distance between two points (after applying Warp by Vector) over time. Or save itin a “.csv” file
Thank you!
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [January 17, 2023, 2:50pm UTC](https://discourse.paraview.org/t/is-distance-in-mm/7551/9 "2023-01-17T14:50:36Z")
Not directly I’m afraid. You could compute it (again) in a programmable filter from the ruler points then save it.