Fence Post Concrete Calculator
Planning a full fence? This calculator first estimates how many posts your run needs, then calculates the concrete volume and bag count for all of those post holes together.
Start with the essentials
Enter the main project measurements. Additional assumptions stay available below when needed.
CUSTOMIZE PROJECT DETAILSAdjust assumptions & product details+
View full takeoff
What you'll need
Key purchase quantities from the same complete BOM used below.
The preview and copied list come from the shared BOM. Planning estimate — verify product sizes, structural requirements and local conditions before purchasing.
Check the method or common questions
Method, formula & assumptions
Fence material planning
Formula: Fence calculations divide each fence run into bays based on your chosen maximum spacing. Multi-side layouts calculate bays per side so direction changes land on posts. Picket calculations use the combined picket width and gap, and gate openings are deducted from the planned fence run.
Worked example: Example: a 64 ft straight run with an 8 ft maximum spacing creates 8 bays and normally 9 posts before gate adjustments. Multi-side layouts repeat the bay calculation separately for each side.
Before you buy: Corners, gates, grade changes and local structural requirements can affect material quantities. Enter each side in the project plan for multi-run layouts, then verify field dimensions, gate locations and local requirements before ordering.
Fence Post Concrete Calculator FAQ
Why can actual post spacing be less than my maximum?
Each run is divided into equal bays so no bay exceeds the maximum spacing you entered.
Does the Fence Calculator include gates?
Yes. Enter the number and width of gate openings under Customize project details. BuildGauge deducts the openings from the planned fence run and includes the gate posts in the takeoff; verify the actual gate framing and hardware before building.
Continue your Fence project
Use the Fence planning hub for related calculators and quick-reference guides.
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