Fence Post Calculator. Count fence posts from separate straight runs, reviewed maximum spacing and shared endpoint IDs. Reconcile gates, exact post SKUs, usable stock and whole sale packs.
A quick decision brief for this specific tool
Reviewed layout revision, distinct straight centerline runs, per-run maximum spacing, shared endpoint IDs, separate gates and optional exact-SKU purchase assignments
Every run’s equal bays and intermediate posts, deduplicated named endpoints, complete post count and optional stock/pack/quoted-cost reconciliation
Round bays upward independently per run, add only unique endpoint posts, then reconcile all assigned product quantities before subtracting usable stock and buying whole sale packs
Choose your path
Reconcile separate maximum-spacing runs and shared endpoint posts with exact-SKU purchases without inventing concrete or structural approval.
Avoid a missed end bay and unsupported concrete quantities.
Enter a reviewed 100 ft run, maximum 8 ft, endpoints A and B; inspect 13 bays and 14 posts.
Both endpoints and 12 interior posts are visible, with no bag-per-post assumption.
Avoid adding the same shared terminal post twice.
Enter separately measured runs and gate endpoints; inspect deduplicated post IDs and reconcile exact SKU assignments.
Shared IDs count once; product assignments sum exactly to layout posts before stock and pack rounding.
Preserve source units and recover from an invalid or unpriced purchase.
Change display units, correct a linked error, replace a quote and inspect/download the complete record.
Original measurements remain traceable; invalid drafts cannot export stale results and blank prices are not zero.
Outputs and checklists are planning aids. Review the linked current authorities and the records, terms, instructions, and requirements that apply to your exact situation before a consequential decision.
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Equal bay spacing is run length divided by the whole bay count. Split the layout at each corner, branch and gate. This upper-limit model does not determine the installed module of a fixed-width panel system.
Bays = ceil(centerline length ÷ reviewed maximum spacing); intermediate posts = bays − 1Use the same ID only for the same physical post. Gate widths are measured separately between their post centers, with no intermediate posts. Crossings, overlapping lines and missing junctions are not detected from IDs.
Total layout posts = unique named endpoint IDs + sum(intermediate posts)Assigned quantities across exact product lines must equal all layout posts. Review role compatibility separately. Each purchased pack is charged in full when a sourced price is present; an unpriced needed item keeps the total unknown.
Required = assigned posts + explicit spares; packs = ceil(max(0, required − usable stock) ÷ posts per pack)Updated: August 2026
With an independently reviewed maximum of 8 ft, 13 bays need 12 intermediate posts plus endpoints A and B: 14 posts. Equal spacing is about 7.692308 ft, not a recommended design spacing.
Run A–B is 100 ft and B–C is 48 ft, each with an illustrative 8 ft maximum. There are 17 intermediate posts and three unique endpoints, for 20 posts; B is not added twice.
An illustrative 14-post assignment with two usable posts in stock and five posts per sale pack needs three packs: 15 purchased posts and three surplus purchased posts. A sourced 100 USD pack price gives a 300 USD post-only purchase.
Use shared endpoint IDs and count each physical post once. Separate post product roles from the number of posts.
Use exact matching SKU assignments, actual sale packs and sourced optional prices. Foundations and other unentered installation costs remain outside this record.
Build a traceable fence-post count from a reviewed layout. Each uninterrupted straight run keeps its own centerline length and maximum spacing. Shared corners and gate endpoints use one physical post ID, while optional exact-SKU assignments reconcile stock and whole-pack purchasing without inferring foundations.