縦板フェンス計算ツール

A classic picket fence sets a visible gap between boards, commonly around 1.5 to 2 inches, rather than the zero gap used on a privacy fence. That gap goes straight into the picket pitch, board width plus gap, which is why the same run of fence needs noticeably fewer boards in picket style than in a butted layout. This page shares its underlying post, rail and picket formulas with the general wood fence calculator, with the picket style and a shorter default height, often 3 to 4 feet, already dialed in for the front-yard look picket fencing is usually built for.

If the picket count needs checking against a different width or gap than the defaults here, the fence picket calculator isolates that single formula and shows the pitch arithmetic directly, which is useful when comparing a quote that uses a slightly different board. Widening the gap lowers the picket count for the same run; narrowing it raises the count, and there is no single correct gap, only a design choice that this calculator lets you test instantly rather than recomputing by hand each time.

Posts on a picket fence follow the same spacing rules as any other wood style, commonly 6 to 8 feet on center, since the lighter, more open infill does not change the post load the way a tall solid privacy fence does. The fence post calculator is the place to check post count and spacing on its own, independent of the picket style. For a taller, fuller look that still lets light through on both sides rather than the solid privacy look, the shadowbox fence calculator uses a similar width-plus-gap formula but doubles the board count because it covers both faces of the rail.

For the picket count on a specific run length, how many pickets for 100 feet of fence walks through the math with worked numbers at a few common board widths. The wood fence installation guide covers layout, post setting and rail attachment once the picket style and gap are decided, and the wood fence calculators hub lists every other wood style this site covers if picket is not the final choice.

A gate across a picket fence run is handled the same way as any other wood style: its width is removed from the fenced run before the picket count is computed, and two gate posts plus a hardware set are added to the post total. Picket fences commonly cross a front walkway, so this step matters more here than on a side or rear-yard fence that may not need a gate at all. Entering the gate width accurately avoids both an inflated picket order and a post count that is short by the posts the gate actually needs.

The top profile, whether pointed, flat, dog-eared or arched, is a decorative choice that does not change the picket count, since count is driven entirely by run length, board width and gap rather than how the top of each board is cut. What does matter for a clean result is establishing the pitch, board width plus gap, once and laying it out consistently from the post centers down the run, rather than restarting the gap measurement at each new post, which is how uneven spacing creeps into an otherwise correct material count.

Picket spacing also interacts with sightline rules some municipalities apply to corner lots, where a fence near an intersection may need to stay below a certain height or maintain a clear sightline triangle regardless of how open the picket gap is. That is a separate check from anything this calculator handles, since it is a placement and height rule rather than a material quantity, but it is worth confirming for a picket fence near a corner or driveway before finalizing the design.

Picket fences are also where mixed hardware choices show up most, since a decorative cap or finial on each picket top, if used, adds a small per-picket cost on top of the board itself and is easy to forget when pricing a job from the board count alone. Pickets with a routed or jig-cut point can also be ordered pre-cut from some suppliers rather than cut on site, which changes labor more than it changes the board count this calculator returns.

A picket fence is also one of the more common styles to run along a front property line rather than around a full perimeter, which means it often needs to tie into a different style, such as a taller privacy fence, at the side yard. Where two styles meet at a transition post, that post typically needs to be sized for whichever style demands more, usually the taller privacy run, even though the picket side of the run uses lighter spacing; planning that transition before ordering materials avoids a mismatched post at the junction.