Fence Panel and Picket Count Calculator

ANALife Services AuthorityNational Calculator Authority›Fence Panel and Picket Count Calculator

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Fence Panel and Picket Count Calculator

Calculate the number of fence panels, pickets, and posts needed for your fencing project based on your fence length and spacing preferences.

Total Fence Length (feet)

Panel Width (feet)

Picket Width (inches)

Gap Between Pickets (inches)

Total Gate Width (feet) (optional)

Waste / Overage (%)

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 picketWidth = parseFloat(document.getElementById('fen-picket-width').value); var picketGap = parseFloat(document.getElementById('fen-picket-gap').value); var gateWidth = parseFloat(document.getElementById('fen-gate-width').value) || 0; var wastePct = parseFloat(document.getElementById('fen-waste').value);

// --- Validation --- if (isNaN(totalLength) || totalLength ⚠ Please enter a valid Total Fence Length greater than 0.'; return; } if (isNaN(panelWidth) || panelWidth ⚠ Please enter a valid Panel Width greater than 0.'; return; } if (isNaN(picketWidth) || picketWidth ⚠ Please enter a valid Picket Width greater than 0.'; return; } if (isNaN(picketGap) || picketGap ⚠ Gap Between Pickets cannot be negative.'; return; } if (isNaN(wastePct) || wastePct 50) { resultDiv.style.display = 'block'; resultDiv.innerHTML = '⚠ Waste percentage must be between 0 and 50.'; return; } if (gateWidth ⚠ Gate width cannot be negative.'; return; } if (gateWidth >= totalLength) { resultDiv.style.display = 'block'; resultDiv.innerHTML = '⚠ Gate width must be less than total fence length.'; return; }

// --- Core Calculations ---

// Effective fencing length (subtract gate openings) var effectiveLength = totalLength - gateWidth;

// Number of panels (round up to nearest whole panel) var panelsExact = effectiveLength / panelWidth; var panelsNeeded = Math.ceil(panelsExact);

// Number of posts = panels + 1 (one post on each side of every panel) var postsNeeded = panelsNeeded + 1;

// Pickets per panel // picket spacing unit = picketWidth (inches) + picketGap (inches), converted to feet var spacingFt = (picketWidth + picketGap) / 12; var picketsPerPanel = Math.ceil(panelWidth / spacingFt);

// Total pickets (base) var totalPicketsBase = picketsPerPanel * panelsNeeded;

// Apply waste factor var wasteFactor = 1 + (wastePct / 100); var totalPicketsWithWaste = Math.ceil(totalPicketsBase * wasteFactor); var extraPickets = totalPicketsWithWaste - totalPicketsBase;

// Linear feet of picket material var linearFeetBase = totalPicketsBase * (picketWidth / 12); var linearFeetWithWaste = totalPicketsWithWaste * (picketWidth / 12);

// --- Output --- resultDiv.style.display = 'block'; resultDiv.innerHTML = '### Results ' + '' + 'Effective Fence Length' + '' + effectiveLength.toFixed(2) + ' ft' + 'Panels Needed' + '' + panelsNeeded + ' panels' + 'Posts Needed' + '' + postsNeeded + ' posts' + 'Pickets per Panel' + '' + picketsPerPanel + ' pickets' + 'Total Pickets (no waste)' + '' + totalPicketsBase + ' pickets' + 'Total Pickets (with ' + wastePct + '% waste)' + '' + totalPicketsWithWaste + ' pickets' + 'Extra Pickets for Waste' + '' + extraPickets + ' pickets' + 'Linear Feet of Picket Material' + '' + linearFeetWithWaste.toFixed(2) + ' ft' + ''; }

#### Formulas Used

Effective Fence Length Effective Length = Total Fence Length − Total Gate Width

Number of Panels Panels = ⌈ Effective Length ÷ Panel Width ⌉  (rounded up)

Number of Posts Posts = Panels + 1  (one post at each end and between every panel)

Pickets per Panel Spacing Unit (ft) = (Picket Width + Gap) ÷ 12 Pickets per Panel = ⌈ Panel Width ÷ Spacing Unit ⌉  (rounded up)

Total Pickets Base Pickets = Pickets per Panel × Panels Total Pickets (with waste) = ⌈ Base Pickets × (1 + Waste% ÷ 100) ⌉

Linear Feet of Picket Material Linear Feet = Total Pickets (with waste) × (Picket Width ÷ 12)

#### Assumptions & References

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References