Corner Post Calculator
Corner posts cover outside and inside corners where siding panels meet. Enter your corner count and wall height to estimate how many posts you'll need.
Corners & height
Corner posts needed
- Total corners
- 0
- Corner linear feet
- 0 LF
How corner posts are estimated
Corner posts are typically sold in standard 10 ft lengths. If your wall is taller than one post length, you'll need multiple stacked posts per corner, rounded up to a whole post.
This is a planning estimate
Frequently asked questions
How many corner posts do I need?
Multiply your total corner count by the number of standard-length posts needed to cover your tallest wall height, rounding up.
Do inside corners need posts too?
Yes, inside corners typically use a similar (sometimes different profile) corner post — include them in your total corner count.
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