Picket Spacing Calculator
Find the exact even gap between fence pickets for any panel. Enter your post-to-post distance, picket width, and number of pickets — get the precise spacing so every gap is identical.
Picket Spacing Calculator
Enter your panel width and picket dimensions to find the perfect even gap between pickets.
Standard Picket Gap Sizes
Different fence styles use different gap standards. Here's a quick reference:
| Fence Style | Standard Gap | Notes |
|---|---|---|
| Wood Picket | 1/4 in (0.25") | Allows for wood expansion |
| Decorative Open Picket | 1.5–3 in | Open, decorative look |
| Semi-Privacy | 1/2–1 in | Partial visibility, some airflow |
| Privacy Solid | 0 in | Boards butted tight |
| Privacy Board-on-Board | −1.5 in (overlap) | Boards overlap 1.5 in on each side |
How to Calculate Picket Spacing by Hand
If you want to verify the calculator manually:
- Measure post-to-post distance in inches (8 ft = 96 inches)
- Multiply picket width × number of pickets (e.g., 25 × 3.5" = 87.5 inches total picket width)
- Subtract from panel width: 96 − 87.5 = 8.5 inches of total gap space
- Count the gaps: 25 pickets with half-gap at each end = 26 gaps total
- Divide: 8.5 ÷ 26 = 0.327 inches per gap
How Many Pickets Per Panel?
Reference table for standard 3.5-inch (1×4) pickets at common gap sizes:
| Panel Width | 1/4-in gap | 1/2-in gap | 1-in gap |
|---|---|---|---|
| 72 in (6 ft) | 19 pickets | 18 pickets | 17 pickets |
| 96 in (8 ft) | 25 pickets | 24 pickets | 22 pickets |
| 120 in (10 ft) | 32 pickets | 30 pickets | 28 pickets |
Picket Spacing for Privacy Fences
Privacy fences use a different approach than open picket fences:
- Solid board: 1×6 boards (5.5" actual) butted tightly together with zero gap. Simple to install but boards can warp without room to expand.
- Board-on-board: Boards alternate sides of the rail, overlapping the adjacent board by 1–1.5 inches. Allows airflow, looks good from both sides, and hides any gaps that appear as boards dry.
- Tongue-and-groove: Interlocking boards that form a perfectly smooth surface. Premium option — nearly zero gap but requires exact installation.
Common Picket Spacing Mistakes
- Same calculation for every bay — measure each post-to-post span individually; they differ slightly in practice
- Using nominal lumber dimensions — a 1×4 is 3.5 inches actual, not 4 inches; always use actual dimensions
- Forgetting the kerf — if cutting your spacer block from a board, subtract ~1/8 inch for the saw blade width
- Ignoring the end gaps — decide whether you want half-gaps at the posts (centered layout) or flush-to-post placement before calculating
- Not checking plumb per picket — use a level on every 3rd or 4th picket; even small lean compounds across a long run
Frequently Asked Questions
What is the standard gap between fence pickets?
The standard gap for wood picket fences is 1/4 inch (0.25 inches). This allows for wood expansion in humid weather while keeping the spacing tight and neat. Decorative fences often use 1.5–3 inch gaps for a more open appearance.
How do I space fence pickets evenly?
Measure the post-to-post distance, subtract the total width of all pickets, and divide by the number of gaps. Cut a spacer block from scrap wood to this exact dimension and use it to position every picket. The calculator above handles all the math automatically.
How many pickets fit in an 8-foot panel?
An 8-foot (96-inch) panel fits approximately 25 standard pickets (3.5-inch wide 1×4 boards) with 1/4-inch gaps. Use the calculator above to get the exact gap for your specific picket width and desired count.
Should fence pickets touch each other?
For privacy fences, yes — boards are butted tight or overlapped. For standard picket fences, always leave at least 1/4-inch gap. Wood pickets pressed too tightly in dry weather will warp and buckle when they absorb moisture and expand.
What size spacer block should I use?
Cut your spacer from scrap wood to the exact gap dimension shown by the calculator. For a standard 8-foot panel with 25 pickets and a centered layout, the spacer is typically around 0.33 inches wide — use a strip of 3/8-inch plywood as a starting point and adjust to your calculation.
Do all fence panels need the same number of pickets?
Not necessarily. If your fence has different bay widths due to uneven terrain or gate placement, calculate each bay separately. Use the calculator for each unique bay width to maintain visually consistent gap sizes across the whole fence.
Can I keep the same gap across the whole fence?
Yes — calculate the gap for your most common bay width and try to keep it consistent. In non-standard bays, slightly adjust the picket count (add or remove one picket) rather than changing the gap. Small gap variations under 1/4 inch are virtually invisible from a distance.