TIMBER FENCING CALCULATOR
Calculate the materials needed for your project with our easy-to-use fence calculator. Enter the height and length of your fence to receive instant estimates, including area coverage and posts and rails. Perfect for accurate planning and budgeting!
CHOOSE YOUR FENCE CALCULATOR:
1) Your fence basics
This calculator is for vertical slatted fences using Kelvin Timber products.
Type in either metres or feet/inches — we’ll auto-fill the other.
Posts calculated at 1.8m centres (Kelvin setup for slatted fencing).
2) Slats, gaps & look
We’ll use your custom gap in the calculation.
3) Post setting & fixings
On exposed sites, we recommend airflow (19mm+) and extra post strength.
Mix & match = nails for slats + screws for rails/posts.
Nice to have — helps protect posts and gives a cleaner finish.
Advanced Settings
Your recommended materials
Prices update live. You can adjust quantities before adding to basket.
| Item | Qty | Unit | Line total | Notes |
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1) Fence length
Expert calculator for Overlap Panel Fencing using Kelvin Timber products.
Type in metres or feet/inches — we’ll auto-fill the other.
2) Panels & posts
All panels are 1828mm wide.
3) Foundations, gravel boards & fixings
Uses 18x150 treated slats (Kelvin stock).
Auto selects 4x4 or 5x5 caps based on post thickness.
Gravel board options
We’ll include RW75 nails + clout nails for gravel boards.
Your materials
Prices update live. You can adjust quantities before adding to basket.
| Item | Qty | Unit | Line total | Notes |
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1) Your fence basics
This calculator is for horizontal Venetian (slatted) fencing using Kelvin Timber products.
Type in either metres or feet/inches — we’ll auto-fill the other.
Posts calculated at 1.8m centres (Kelvin standard).
2) Battens, gap & privacy
We’ll use your custom gap in the calculation.
Membrane blocks visibility through gaps, hides backgrounds, and helps stop growth through the fence.
3) Post setting & fixings
On exposed sites, consider stronger posts and more Postcrete.
Mix & match includes both nails + screws so you can choose your preferred method on site.
Nice to have — helps protect posts and gives a cleaner finish.
Advanced Settings
Your recommended materials
Prices update live. You can adjust quantities before adding to basket.
| Item | Qty | Unit | Line total | Notes |
|---|