Fence Panel and Picket Calculator
ANA›Life Services Authority›National Calculator Authority›Fence Panel and Picket Calculator
.calc-container { max-width: 640px; margin: 2rem 0; padding: 1.5rem; background: #fff; border: 1px solid #ddd; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); font-family: system-ui, -apple-system, sans-serif; } .calc-container h3 { font-family: Georgia, serif; font-size: 1.15rem; color: #1a1a1a; margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-row { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; flex-wrap: wrap; } .calc-row label { min-width: 160px; font-size: 0.9rem; color: #333; font-weight: 500; } .calc-row input[type="number"], .calc-row select { flex: 1; min-width: 120px; max-width: 200px; padding: 0.5rem 0.6rem; border: 1px solid #ccc; border-radius: 4px; font-size: 0.9rem; font-family: system-ui, sans-serif; color: #1a1a1a; background: #fafaf8; } .calc-row input:focus, .calc-row select:focus { outline: none; border-color: var(--ac, #3d5a80); box-shadow: 0 0 0 2px rgba(26,74,138,0.12); } .calc-row .unit { font-size: 0.82rem; color: #888; min-width: 30px; } .calc-btn { display: inline-block; margin-top: 0.5rem; padding: 0.55rem 1.5rem; background: var(--ac, #3d5a80); color: #fff; border: none; border-radius: 4px; font-size: 0.9rem; font-weight: 600; cursor: pointer; font-family: system-ui, sans-serif; } .calc-btn:hover { opacity: 0.9; } .calc-result { margin-top: 1.25rem; padding: 1rem 1.25rem; background: #f0f6fc; border-left: 3px solid var(--ac, #3d5a80); border-radius: 0 6px 6px 0; display: none; } .calc-result.visible { display: block; } .calc-result-label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: #666; margin-bottom: 0.25rem; } .calc-result-value { font-size: 1.6rem; font-weight: 700; color: var(--ac, #3d5a80); } .calc-result-detail { font-size: 0.85rem; color: #555; margin-top: 0.5rem; line-height: 1.5; } .calc-note { margin-top: 1rem; font-size: 0.8rem; color: #888; font-style: italic; } .calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin-top: 0.75rem; } .calc-grid-item { padding: 0.6rem 0.8rem; background: #f8f9fa; border-radius: 4px; border: 1px solid #eee; } .calc-grid-item .label { font-size: 0.75rem; color: #888; text-transform: uppercase; letter-spacing: 0.04em; } .calc-grid-item .value { font-size: 1.1rem; font-weight: 600; color: #1a1a1a; } @media (max-width: 720px) { .calc-row { flex-direction: column; align-items: flex-start; gap: 0.3rem; } .calc-row label { min-width: auto; } .calc-row input[type="number"], .calc-row select { max-width: 100%; width: 100%; } .calc-grid { grid-template-columns: 1fr; } } .calc-chart { margin: 1rem 0; text-align: center; } .calc-chart svg { max-width: 100%; height: auto; } .calc-chart-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.6rem 1.2rem; margin-top: 0.6rem; font-size: 0.8rem; color: #555; } .calc-chart-legend span { display: inline-flex; align-items: center; gap: 0.3rem; } .calc-chart-legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; font-style: normal; } .calc-related { max-width: 640px; margin: 2rem 0 1rem; padding: 1.25rem 1.5rem; background: #f8f9fa; border: 1px solid #e8e8e8; border-radius: 8px; } .calc-related h3 { font-family: Georgia, serif; font-size: 1rem; color: #1a1a1a; margin: 0 0 0.75rem; padding-bottom: 0.4rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-related-list { list-style: none; padding: 0; margin: 0 0 0.75rem; display: grid; grid-template-columns: 1fr 1fr; gap: 0.4rem 1.5rem; } .calc-related-list li a { font-size: 0.88rem; color: var(--ac, #3d5a80); text-decoration: none; } .calc-related-list li a:hover { text-decoration: underline; } .calc-browse-all { margin: 0.5rem 0 0; font-size: 0.9rem; font-weight: 600; } .calc-browse-all a { color: var(--ac, #3d5a80); text-decoration: none; } .calc-browse-all a:hover { text-decoration: underline; } @media (max-width: 720px) { .calc-related-list { grid-template-columns: 1fr; } }
Fence Panel and Picket Calculator
Calculate the number of fence panels, pickets, posts, and rails needed for your fencing project based on total fence length and spacing.
Total Fence Length (ft)
Panel Width (ft)
Fence Height (ft)
Picket Width (in)
Gap Between Pickets (in)
Number of Rails per Panel
Post Width (in)
Waste Factor (%)
Calculate
function fenCalc() { var resultDiv = document.getElementById('fen-result');
var totalLength = parseFloat(document.getElementById('fen-total-length').value); var panelWidth = parseFloat(document.getElementById('fen-panel-width').value); var fenceHeight = parseFloat(document.getElementById('fen-fence-height').value); var picketWidthIn = parseFloat(document.getElementById('fen-picket-width').value); var picketGapIn = parseFloat(document.getElementById('fen-picket-gap').value); var numRails = parseInt(document.getElementById('fen-num-rails').value); var postWidthIn = parseFloat(document.getElementById('fen-post-width').value); var wastePct = parseFloat(document.getElementById('fen-waste-pct').value);
// --- Validation --- var errors = []; if (isNaN(totalLength) || totalLength 5) errors.push("Number of rails must be between 1 and 5."); if (isNaN(postWidthIn) || postWidthIn 50) errors.push("Waste factor must be between 0% and 50%.");
var picketSpacingIn = picketWidthIn + picketGapIn; if (!isNaN(picketSpacingIn) && picketSpacingIn 0) { resultDiv.style.display = 'block'; resultDiv.innerHTML = 'Please fix the following:' + errors.map(function(e){ return ''; }).join('') + ''; return; }
// --- Core Calculations ---
// Convert post width to feet var postWidthFt = postWidthIn / 12;
// Number of panels (ceiling division) // Each panel span = panelWidth; posts sit between panels // Total panels = ceil(totalLength / panelWidth) var numPanels = Math.ceil(totalLength / panelWidth);
// Number of posts = numPanels + 1 (one at each end and between each panel) var numPosts = numPanels + 1;
// Effective usable width per panel (subtract post widths at each end of panel) // For a standard fence: posts are at panel boundaries // Usable picket space per panel = panelWidth - postWidthFt (one post per panel boundary shared) // More precisely: total post width = numPosts * postWidthFt // Total picket space = totalLength - (numPosts * postWidthFt) var totalPostWidth = numPosts * postWidthFt; var totalPicketSpace = totalLength - totalPostWidth; if (totalPicketSpace '; html += 'ItemValueWith ' + wastePct + '% Waste'; html += 'Total Fence Length' + totalLength.toFixed(1) + ' ft—'; html += 'Number of Panels' + numPanels + '—'; html += 'Number of Posts' + numPosts + '' + totalPostsWithWaste + ''; html += 'Pickets per Panel' + picketsPerPanel + '—'; html += 'Total Pickets' + totalPickets + '' + totalPicketsWithWaste + ''; html += 'Rails per Panel' + numRails + '—'; html += 'Total Rails' + totalRails + '' + totalRailsWithWaste + ''; html += 'Total Rail Length' + totalRailLength.toFixed(1) + ' ft' + totalRailLengthWithWaste.toFixed(1) + ' ft'; html += 'Picket Board Feet—' + picketBoardFeet.toFixed(1) + ' bd ft'; html += '';
html += ''; html += 'Note: Last panel is approximately ' + lastPanelLength.toFixed(2) + ' ft wide (' + lastPanelPct + '% of a full panel). '; html += 'Usable picket space per panel: ' + (usableWidthPerPanel * 12).toFixed(2) + ' in. '; html += 'Picket spacing (width + gap): ' + picketSpacingIn.toFixed(2) + ' in.'; html += '';
resultDiv.style.display = 'block'; resultDiv.innerHTML = html; }
#### Formulas Used
Number of Panels: Panels = ⌈ Total Length ÷ Panel Width ⌉
Number of Posts: Posts = Panels + 1
Total Picket Space: Picket Space (ft) = Total Length − (Posts × Post Width in ft)
Pickets per Panel: Pickets/Panel = ⌈ (Picket Space ÷ Panels) ÷ (Picket Width + Gap in ft) ⌉
Total Pickets: Total Pickets = Pickets/Panel × Panels
Total Rails: Total Rails = Rails/Panel × Panels
With Waste Factor: Adjusted Quantity = ⌈ Base Quantity × (1 + Waste% ÷ 100) ⌉
Picket Board Feet: Board Feet = (1 in × Picket Width in × Fence Height ft ÷ 12) × Total Pickets (with waste)
#### Assumptions & References
- Posts are placed at every panel boundary (one post per panel end, shared between adjacent panels), giving Panels + 1 total posts.
- Picket width and gap are entered in inches; all other dimensions are in feet.
- Reference: RS Means Building Construction Cost Data; NAHB framing guidelines.
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