# What exactly does "border buffer" mean?

**URL:** https://forums.negativelabpro.com/t/what-exactly-does-border-buffer-mean/1614
**Category:** Guides and How-Tos
**Created:** [April 18, 2020, 3:30pm UTC](https://forums.negativelabpro.com/t/what-exactly-does-border-buffer-mean/1614 "2020-04-18T15:30:51Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![dizzymisslizzy](https://avatars.discourse-cdn.com/v4/letter/d/da6949/32.png) [@dizzymisslizzy](https://forums.negativelabpro.com/u/dizzymisslizzy)
#### Post date: [April 18, 2020, 3:30pm UTC](https://forums.negativelabpro.com/t/what-exactly-does-border-buffer-mean/1614/1 "2020-04-18T15:30:51Z")

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Hi ,  
What exactly does “border buffer” mean?  
or what’s the exact mathematical definition of “5% border buffer”?

For example, a 1000 \* 1000 px crop with 5% border buffer. what’s the exact outcome?

1. 950 \* 950 px (5% of the width and height in total length)
2. 974.7 \* 974.7 px (5% of the crop area)  
or otherwise?

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### Author: ![nate](https://yyz1.discourse-cdn.com/flex029/user_avatar/forums.negativelabpro.com/nate/32/4_2.png) [@nate](https://forums.negativelabpro.com/u/nate)
#### Post date: [April 18, 2020, 6:29pm UTC](https://forums.negativelabpro.com/t/what-exactly-does-border-buffer-mean/1614/2 "2020-04-18T18:29:09Z")

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It disregards the outer 5% of the image on all sides, so in this example, it disregards 50 pixels on each side. So the final, considered dimensions would be the center 900x900px, with 50px on each side disregarded.

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### Author: ![dizzymisslizzy](https://avatars.discourse-cdn.com/v4/letter/d/da6949/32.png) [@dizzymisslizzy](https://forums.negativelabpro.com/u/dizzymisslizzy)
#### Post date: [April 24, 2020, 10:32am UTC](https://forums.negativelabpro.com/t/what-exactly-does-border-buffer-mean/1614/3 "2020-04-24T10:32:11Z")

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thanks, it helps a lot!