The formula
Panels = (run length − gate opening) ÷ panel width, rounded up. Posts = number of panel bays + gate bays + 1. Post-mix bags = posts × bags per post.
Garden • UK CALCULATOR
Fence Panel Calculator UK
Estimate materials for one straight fence run using standard panels, with an optional gate opening. We calculate approximate panels, post count and post-mix bags.
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Your estimate starts here
Enter your measurements and calculate to see materials, quantities and an optional price estimate.
GOOD TO KNOW
How this calculator works
Worked example
A straight 10.8 m run using 1.8 m panels needs 6 panels and about 7 posts without a gate.
Check before ordering
This assumes a single straight fence without corners or changes of level. Gate placement, post thickness, cuts, end fixings and foundation depth may change quantities. Check wind exposure and manufacturer instructions before choosing post sizes or foundations.