Sisal Rope Calculator
Enter your post's dimensions to estimate how much 4mm sisal rope you'll need. The calculator supports both square posts (e.g. a 70x70mm post built from two 70x35mm timbers) and round posts / branches.
e.g. 2m = 200cm. A typical cat post is 90–120cm tall.
Covers corner slack, end ties and non-perfect wrapping. ~40% matches our real-world figure of one 200m roll ≈ 2m of 70x70 post.