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# Calculating Window and Door Trim

## Calculating Window and Door Trim

#1
10-22-19, 12:42 PM
Member
Join Date: May 2010
Location: USA
Posts: 141
Calculating Window and Door Trim

I'm installing 2 1/4" x 84" casing around 6 windows and a door. 4 of the windows are 47" x 47," the other 2 are 36" x 47" and the door is 82" x 36". Since I will be ordering the 2 1/4" x 84" pieces on line for delivery, how many of these pieces will I need?

Thanks.

#2
10-22-19, 01:40 PM
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Join Date: Sep 2019
Posts: 1,955
Following is my math assuming no splicing and 45 degree cut corners.
FYI : The door side trims will be too short.

4 @ 47X47 = 16 pieces
2 @ 36X47 = 6 pieces
1 @ 82X36 = 3 pieces

Total = 25 pieces plus a few in case you screw up or get bad pieces,

#3
10-22-19, 02:24 PM
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Join Date: May 2010
Location: USA
Posts: 141
Thanks. It looks like I'm going to have a lot left over.

#4
10-22-19, 02:47 PM
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Join Date: Dec 2004
Posts: 27,104
It would be better if you could get 9' pieces. You would only need 14pc.

#5
10-22-19, 03:52 PM
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Join Date: May 2010
Location: USA
Posts: 141
Good idea. I'll check around but most places that's the max.

#6
10-22-19, 04:21 PM
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Join Date: May 2010
Location: USA
Posts: 141
I can't find 9' but I found 10' which is a standard size. How many of those? Thanks.

#7
10-22-19, 04:27 PM
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Join Date: Dec 2004
Posts: 27,104
14 pc. Plus however many you need for mistakes.

#8
10-22-19, 07:10 PM
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Join Date: May 2010
Location: USA
Posts: 141
So, for 9' pieces I need 14 and 10' pieces I need 14?

#9
10-22-19, 07:19 PM
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Join Date: Dec 2004
Posts: 27,104
You seem to have figured that out, yes.