Fencing calculator
Enter the fence length in metres, the panel width and the post width to see how many panels, posts and gravel boards a straight run needs.
Estimates only. Check the manufacturer's coverage rates.
How this is calculated
Standard UK fence panels are about 1.83 m (6 ft) wide. Each panel sits between two posts, so a straight run needs one more post than panels. The calculator divides the run length, less one post width, by the width of one panel plus one post, and rounds up to whole panels. Gravel boards match the panel count, one per panel, sitting at the bottom of each bay.
It also shows the total length covered by that many panels and posts, so you can see how far the run reaches and how much it overshoots. The last panel often needs cutting to fit the exact length, which is normal on most runs.
This page covers a single straight run only. Corners and gates need extra posts, so add them separately when you order. Concrete or post mix is needed for every post, but quantities vary with hole size, so this page does not estimate it; check the post mix bag for its coverage per hole.
- Corners and gates need extra posts; add them separately.
- Concrete or post mix is needed for every post, but quantities vary with hole size, so it is not estimated here.
Frequently asked questions
How wide is a standard fence panel?
About 1.83 m (6 ft) in the UK. Check your panels and enter the actual width if it differs.
How many posts do I need?
A straight run needs one more post than panels. Corners and gates need extra posts, so add those separately.
Does this include concrete or post mix?
No. Every post needs concrete or post mix, but quantities vary with hole size, so this page does not estimate it.