Carpet Drying Time Estimator

ANA›Life Services Authority›National Calculator Authority›Carpet Drying Time Estimator

.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; } }

Carpet Drying Time Estimator

Estimate carpet drying time based on carpet thickness, moisture saturation, room temperature, relative humidity, and airflow conditions.

Carpet Type

Low-pile / Berber Medium-pile (standard) High-pile / Shag Thick / Wool / Padded

Thicker carpets retain more moisture and take longer to dry.

Moisture Saturation Level (%)

10% = slightly damp, 100% = fully saturated (flooding).

Room Temperature (°F)

Higher temperatures accelerate evaporation.

Relative Humidity (%)

Lower humidity speeds up drying significantly.

Airflow Condition

None (closed room, no fans) Low (ceiling fan or open window) Moderate (box fan or AC running) High (multiple fans / dehumidifier) Professional (air movers + dehumidifier)

Airflow is the single biggest factor in drying speed.

Carpet Area (sq ft) (optional, for water volume estimate)

Leave blank to skip water volume calculation.

Estimate Drying Time

function carCalc() { var resultDiv = document.getElementById('car-result');

// --- Gather inputs --- var carpetFactor = parseFloat(document.getElementById('car-carpet-type').value); var moisture = parseFloat(document.getElementById('car-moisture').value); var tempF = parseFloat(document.getElementById('car-temp').value); var humidity = parseFloat(document.getElementById('car-humidity').value); var airflowFactor= parseFloat(document.getElementById('car-airflow').value); var areaRaw = document.getElementById('car-area').value.trim();

// --- Validation --- var errors = []; if (isNaN(moisture) || moisture 100) errors.push("Moisture saturation must be between 10% and 100%."); if (isNaN(tempF) || tempF 120) errors.push("Temperature must be between 32°F and 120°F."); if (isNaN(humidity) || humidity 99) errors.push("Relative humidity must be between 1% and 99%.");

var hasArea = (areaRaw !== ""); var area = NaN; if (hasArea) { area = parseFloat(areaRaw); if (isNaN(area) || area 10000) errors.push("Carpet area must be between 1 and 10,000 sq ft."); }

if (errors.length > 0) { resultDiv.innerHTML = 'Please fix the following:' + errors.map(function(e){ return ''; }).join('') + ''; return; }

// --- Core Formula --- // Base drying time (hours) derived from empirical restoration industry data: // // Step 1: Temperature factor // Evaporation rate roughly doubles every 18°F above 50°F (Antoine-like approximation). // tempFactor = 1 / (0.5 * 2^((tempF - 50) / 18)) // Reference baseline: 72°F → tempFactor ≈ 1.0 var tempFactor = 1.0 / (0.5 * Math.pow(2, (tempF - 50) / 18));

// Step 2: Humidity factor // Drying slows as air approaches saturation. Factor scales from ~0.5 (dry) to ~3.0 (very humid). // humidityFactor = 1 / (1 - RH/100)^0.6 (bounded) // At RH=50% → factor ≈ 1.19; at RH=80% → factor ≈ 2.63; at RH=20% → factor ≈ 0.79 var humidityFactor = 1.0 / Math.pow(1 - humidity / 100, 0.6);

// Step 3: Moisture factor — more water = proportionally more time (linear) // Normalized to 80% saturation as baseline (= 1.0) var moistureFactor = moisture / 80.0;

// Step 4: Combine all factors // Base hours at standard conditions (medium pile, 80% moisture, 72°F, 50% RH, moderate airflow) = 6 hours var BASE_HOURS = 6.0; var rawHours = BASE_HOURS * carpetFactor * moistureFactor * tempFactor * humidityFactor * airflowFactor;

// Clamp to reasonable range rawHours = Math.max(0.5, Math.min(rawHours, 168)); // 30 min to 7 days

// --- Derive days / hours display --- var days = Math.floor(rawHours / 24); var hours = rawHours % 24;

// Round to nearest 0.5 hour for display var hoursRounded = Math.round(rawHours * 2) / 2;

// --- Risk category --- var risk, riskClass; if (rawHours = 0.5) timeStr += " " + hDisplay.toFixed(1) + " hours"; }

// --- Tips --- var tips = []; if (humidity > 60) tips.push("Run a dehumidifier — your humidity is high."); if (tempF 1.0) tips.push("Add fans or open windows to improve airflow."); if (rawHours > 48) tips.push("Consider professional water extraction equipment."); if (moisture > 90) tips.push("Extract standing water with a wet-vac before air drying.");

var tipsHTML = ""; if (tips.length > 0) { tipsHTML = "Tips to speed up drying:

" + tips.map(function(t){ return ""; }).join("") + ""; }

resultDiv.innerHTML = "### Estimated Drying Time: " + timeStr + " " + "Mold Risk: " + risk + "

" + waterHTML + "Breakdown of factors used:

" + "" + "" + "" + "" + "" + "" + "" + tipsHTML; }

#### Formula

Drying Time (hours) = 6 × Ccarpet × Mfactor × Tfactor × Hfactor × Afactor

#### Assumptions & References

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References

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