Estimate wood fence posts, rails, pickets or pre-made panels, post-hole concrete and optional material costs for multiple fence runs and gates.
Estimate materials for wood privacy fences, open picket fences and pre-made panels. Enter each straight run separately, then add gate openings, post spacing and material dimensions to estimate posts, rail pieces, boards or panels, and concrete.
Use it as a planning worksheet for a wood fence project. It turns the fence runs you enter into a practical material takeoff, then separates the effect of gate openings from the covered fence length.
This fence material calculator helps estimate the main supplies for a wood fence: posts, horizontal rails, pickets or pre-made panels, and concrete for post holes. For a useful wood fence material calculator estimate, measure every straight fence run separately, note the gate openings, and check whether connected runs share corner posts.
Choose the construction style before calculating. A privacy fence uses closely spaced boards, an open picket fence includes a gap between boards, and a panel fence is estimated from the panel width. Add a realistic waste allowance for cuts and damaged materials, then enter local unit prices if you want an optional material-cost estimate.
This is a planning estimate rather than a construction specification. Confirm dimensions, post spacing, footing depth and material requirements against your fence design, local rules, site conditions and product instructions.
The formulas are intentionally visible so you can audit the result. Rounding, the exact position of gates, slopes, cut-down panels and local installation requirements can change the final purchase quantity.
For one straight 100 ft run with a 6 ft fence height and 8 ft maximum post spacing, the calculator starts with 13 sections and 14 post positions. With three rail courses, 8 ft rail stock, 5.5 in boards with no gap and a 10% material overage, the example estimate is:
| Material | Example quantity | Assumptions |
|---|---|---|
| Fence posts | 14 | One run, no gates or shared corners |
| Rail pieces | 43 | Three courses, 8 ft stock, 10% overage |
| Boards / pickets | 241 | 5.5 in board width, zero gap, 10% overage |
| Concrete | 23 bags | 8 in hole, 36 in depth, 3 in gravel base, 3.5 in square post, 60 lb bag yield of 0.45 ft³ |
These are illustrative planning quantities, not a construction specification. The example uses the default layout and material assumptions shown. Actual post spacing, gate locations, stock lengths, cuts, soil and concrete product yield can change the purchase list. Confirm the design and product instructions before ordering.
At an 8 ft maximum spacing, one straight 100 ft run produces 13 sections after rounding up and 14 post positions. The actual layout can require shorter bays at gates, corners or obstacles, so use the calculator with your individual runs for a more practical estimate.
Enter each straight run separately, choose the maximum post spacing and select a wood fence or pre-made panel layout. The calculator rounds post-spacing sections per run, subtracts any shared corners you enter, and estimates rail pieces and boards or panels with your waste allowance. Gate width is distributed proportionally across runs because exact gate locations are not entered. Add post-hole dimensions and the concrete bag yield for a footing estimate.
Choose Pre-made fence panels and enter the panel width. The calculator rounds panel quantities up separately for each fence run after its proportional gate-width allowance. Actual panel cuts, gate placement and layout details can change the final purchase quantity.
Each run has its own end positions, so the calculator estimates post positions separately for every non-empty run, then subtracts the shared-corner count you enter. Only count a shared corner when two runs really use the same physical post.
Total gate width is removed from the covered fence length. Because exact gate locations are not entered, the opening width is distributed proportionally across the runs for material estimates. Two gate-position posts per opening are added as a conservative allowance; this can overcount when a gate post replaces an ordinary line post. Gate hardware and exact gate-frame materials are not included.
The tool calculates the volume of the cylindrical hole, subtracts the volume occupied by the post within the concrete depth, multiplies by the number of posts and divides by the selected bag yield. It then rounds up to whole bags.
This version is intended for common wood picket/privacy layouts and pre-made fence panels. Chain-link and metal systems use different components and installation rules, so they are not treated as interchangeable with this material model.
The calculator is a planning model. Source material is used for general installation and concrete-yield references; the calculator does not claim a single universal fence standard.