Fence Stain and Sealant Coverage Calculator

ANA›Life Services Authority›National Calculator Authority›Fence Stain and Sealant Coverage 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 Stain and Sealant Coverage Calculator

Calculate how many gallons of stain or sealant you need to cover your fence, accounting for fence style, number of coats, and waste factor.

Fence Length (feet)

Fence Height (feet)

Fence Style

Solid Board / Privacy (100% coverage) Shadowbox / Board-on-Board (~75% coverage) Split Rail / Picket (~50% coverage) Stockade (~85% coverage)

Sides to Coat

One Side Both Sides

Number of Coats

Product Coverage Rate (sq ft per gallon)

Check your product label. Typical range: 150–400 sq ft/gal.

Waste / Overage Factor (%)

Recommended: 10% for smooth surfaces, 15–20% for rough or weathered wood.

Calculate

function fenCalc() { var length = parseFloat(document.getElementById('fen-length').value); var height = parseFloat(document.getElementById('fen-height').value); var style = parseFloat(document.getElementById('fen-style').value); var sides = parseInt(document.getElementById('fen-sides').value); var coats = parseInt(document.getElementById('fen-coats').value); var coverage = parseFloat(document.getElementById('fen-coverage').value); var waste = parseFloat(document.getElementById('fen-waste').value);

var resultDiv = document.getElementById('fen-result'); resultDiv.style.display = 'block';

// --- Validation --- if (isNaN(length) || length 5) { resultDiv.innerHTML = 'Number of coats must be between 1 and 5.

'; return; } if (isNaN(coverage) || coverage 50) { resultDiv.innerHTML = 'Waste factor must be between 0% and 50%.

'; return; }

// --- Core Formula --- // Gross surface area (both sides if selected) var grossArea = length * height * sides;

// Net paintable area adjusted for fence style (open vs solid) var netArea = grossArea * style;

// Total area needed across all coats var totalArea = netArea * coats;

// Raw gallons needed var rawGallons = totalArea / coverage;

// Apply waste/overage factor var adjustedGallons = rawGallons * (1 + waste / 100);

// Round up to nearest whole gallon for purchase recommendation var gallonsToBuy = Math.ceil(adjustedGallons);

// Common container sizes var quarts = Math.ceil(adjustedGallons * 4); // 1 gal = 4 quarts var fiveGal = Math.ceil(adjustedGallons / 5); // 5-gallon buckets

resultDiv.innerHTML = '### Results ' + '' + 'Gross Fence Area (one side)' + (length * height).toFixed(1) + ' sq ft' + 'Net Paintable Area (' + sides + ' side(s), ' + (style * 100).toFixed(0) + '% solid)' + netArea.toFixed(1) + ' sq ft' + 'Total Area (× ' + coats + ' coat(s))' + totalArea.toFixed(1) + ' sq ft' + 'Raw Gallons Needed' + rawGallons.toFixed(2) + ' gal' + 'With ' + waste + '% Waste Factor' + adjustedGallons.toFixed(2) + ' gal' + 'Gallons to Purchase' + gallonsToBuy + ' gallon(s)' + '' + 'Buying Options: ' + quarts + ' quart(s)  |  ' + fiveGal + ' five-gallon bucket(s)

' + 'Coverage rate used: ' + coverage + ' sq ft/gal  |  Product label may vary — always verify before purchasing.

'; }

#### Formula

1. Gross Area = Fence Length × Fence Height × Number of Sides 2. Net Paintable Area = Gross Area × Fence Style Factor     (Solid = 1.00 | Stockade = 0.85 | Shadowbox = 0.75 | Split Rail/Picket = 0.50) 3. Total Area = Net Paintable Area × Number of Coats 4. Raw Gallons = Total Area ÷ Coverage Rate (sq ft/gal) 5. Adjusted Gallons = Raw Gallons × (1 + Waste Factor / 100) 6. Gallons to Purchase = ⌈ Adjusted Gallons ⌉ (rounded up to nearest whole gallon)

#### Assumptions & References

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References

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