# Facearea calc auto update

**URL:** <https://forums.sketchup.com/t/facearea-calc-auto-update/49855>\
**Category:** Dynamic Components\
**Created:** [August 11, 2017, 7:17pm UTC](https://forums.sketchup.com/t/facearea-calc-auto-update/49855 "2017-08-11T19:17:28Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![archtak](https://avatars.discourse-cdn.com/v4/letter/a/76d3ee/32.png) [@archtak](https://forums.sketchup.com/u/archtak)\
**Post date:** [August 11, 2017, 7:17pm UTC](https://forums.sketchup.com/t/facearea-calc-auto-update/49855/1 "2017-08-11T19:17:28Z")

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Hi i created a dynamic component and used the facearea function to calculate the area of one of the faces in the component. How ever if i change the size of the component the face area does not update. If i click in to the function and hit enter it does but i would like it to automatically update if i can the component.

Thanks

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**Author:** ![pcmoor](https://sea2.discourse-cdn.com/sketchup/user_avatar/forums.sketchup.com/pcmoor/32/3427_2.png) [@pcmoor](https://forums.sketchup.com/u/pcmoor)\
**Post date:** [August 12, 2017, 12:00am UTC](https://forums.sketchup.com/t/facearea-calc-auto-update/49855/2 "2017-08-12T00:00:44Z")

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there is no automatic way of doing this, the area is stretched or scaled when you change the boundary box via its length attributes, this you can see when you right click menu and select reset scale. There is a manual way to achieve your goal by right click menu, scale definition, right click menu, dynamic components/ Redraw. You can assign key short cuts to these commands whilst the component is selected via the window/preferences/shortcuts to make life a little easier.

 ![Capture](https://global.discourse-cdn.com/sketchup/original/3X/0/f/0f7e582faf953132d1fffb0189ab1739718df3cb.PNG)  
 ![Capture2](https://global.discourse-cdn.com/sketchup/original/3X/6/3/63ac75d69a65fb6eb1ac355750984cbe8d482a74.PNG)

“n” and “u” are are free if you have not already assigned them, so once assigned u to scale definition, n to redraw; one can press keyboard “u” “enter” “n” “enter” after the changes

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**Author:** ![archtak](https://avatars.discourse-cdn.com/v4/letter/a/76d3ee/32.png) [@archtak](https://forums.sketchup.com/u/archtak)\
**Post date:** [August 14, 2017, 4:28pm UTC](https://forums.sketchup.com/t/facearea-calc-auto-update/49855/3 "2017-08-14T16:28:42Z")

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This helps, at least it makes it way easier. Thanks!

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**Author:** ![system](https://global.discourse-cdn.com/sketchup/original/3X/f/2/f2a121500b085ed60806607a82720b092d800bb3.png) [@system](https://forums.sketchup.com/u/system)\
**Post date:** [November 14, 2017, 8:28am UTC](https://forums.sketchup.com/t/facearea-calc-auto-update/49855/4 "2017-11-14T08:28:46Z")

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