Domain Authority Calculator
body {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
background-color: #f8f9fa;
color: #333;
line-height: 1.6;
margin: 0;
padding: 20px;
}
.calculator-container {
max-width: 800px;
margin: 40px auto;
background-color: #ffffff;
border-radius: 8px;
box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
padding: 30px;
border: 1px solid #e0e0e0;
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h1, h2 {
text-align: center;
color: #004a99;
margin-bottom: 20px;
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.input-group {
margin-bottom: 20px;
display: flex;
flex-direction: column;
gap: 10px;
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.input-group label {
font-weight: bold;
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margin-bottom: 5px;
color: #004a99;
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padding: 12px 15px;
border: 1px solid #ccc;
border-radius: 5px;
box-sizing: border-box;
font-size: 1rem;
transition: border-color 0.3s ease;
}
.input-group input[type="number"]:focus,
.input-group input[type="text"]:focus {
border-color: #004a99;
outline: none;
}
button {
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width: 100%;
padding: 15px 20px;
background-color: #004a99;
color: white;
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border-radius: 5px;
font-size: 1.1rem;
font-weight: bold;
cursor: pointer;
transition: background-color 0.3s ease, transform 0.2s ease;
margin-top: 10px;
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button:hover {
background-color: #003366;
transform: translateY(-2px);
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#result-container {
margin-top: 30px;
padding: 25px;
background-color: #eef7ff;
border-left: 5px solid #004a99;
border-radius: 5px;
text-align: center;
}
#result-container h3 {
margin-top: 0;
color: #004a99;
font-size: 1.4rem;
}
#domain-authority-score {
font-size: 2.5rem;
font-weight: bold;
color: #28a745;
margin-top: 10px;
}
.article-section {
margin-top: 40px;
padding: 30px;
background-color: #ffffff;
border-radius: 8px;
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border: 1px solid #e0e0e0;
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margin-bottom: 15px;
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.disclaimer {
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text-align: center;
margin-top: 20px;
}
@media (min-width: 768px) {
.input-group {
flex-direction: row;
align-items: center;
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.input-group label {
flex-basis: 40%;
margin-bottom: 0;
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.input-group input[type="number"],
.input-group input[type="text"] {
flex-basis: 60%;
}
}
Domain Authority Calculator
Note: Domain Authority (DA) is a proprietary score developed by Moz. This calculator provides an estimation based on key SEO factors, but the actual Moz score may vary.
Estimated Domain Authority (DA)
Understanding Domain Authority (DA) and How It's Calculated
Domain Authority (DA) is a search engine ranking score developed by Moz that predicts how well a website will rank on search engine result pages (SERPs). DA scores range from 1 to 100, with higher scores indicating a greater likelihood of ranking higher. It's crucial to understand that DA is a predictive metric, not a direct ranking factor used by Google. However, it serves as an excellent benchmark for comparing the SEO strength of different websites and tracking your own site's progress over time.
While Moz does not publicly disclose the exact algorithm for calculating DA, industry experts and SEO professionals have identified several key factors that heavily influence the score. This calculator aims to provide an estimated DA based on these commonly accepted factors.
Key Factors Influencing Domain Authority:
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Linking Root Domains: This is arguably the most significant factor. The number of unique domains linking to your website is a strong indicator of your site's authority and trustworthiness. More diverse and authoritative backlinks generally lead to a higher DA.
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Total Backlinks: While linking root domains are more critical, the total number of backlinks still plays a role. A high volume of backlinks, even from a smaller number of referring domains, can contribute to a higher score, assuming quality is maintained.
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Domain Age: Older domains tend to have more established authority and a longer history of content and backlinks. While not a direct score booster, age often correlates with other positive SEO signals.
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Website Traffic: Higher organic traffic often indicates a site that users find valuable and that search engines deem relevant. This indirect signal can positively influence DA.
-
Brand Mentions: While harder to quantify precisely, mentions of your brand across the web, even without a direct link, can contribute to brand recognition and indirectly impact authority.
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Content Quality and Relevance: Though not directly inputted here, high-quality, relevant content is the foundation for attracting backlinks and traffic, which *are* factored into DA.
-
On-Page SEO: Optimized titles, meta descriptions, header tags, and internal linking also contribute to a site's overall SEO health.
How This Calculator Estimates DA:
This calculator uses a simplified, weighted model to estimate Domain Authority. The inputs you provide are assigned weights based on their perceived importance in the SEO community. The formula is designed to scale, giving more significant boosts for higher numbers of linking root domains and total backlinks, while also considering the age and traffic of the domain. Brand mentions are included as a supplementary factor.
Important Note: This is an approximation. For the definitive Domain Authority score, you should use Moz's own tools like MozBar or Link Explorer. This calculator is intended for educational purposes and to give you a general understanding of the factors that contribute to a strong online presence.
Use Cases:
- Competitor Analysis: Compare your estimated DA against competitors to gauge your relative SEO strength.
- Link Building Strategy: Understand which factors to prioritize when building backlinks.
- SEO Progress Tracking: Monitor how your DA estimate changes as you implement SEO strategies.
- Website Valuation: DA can be a minor component in assessing a website's potential value.
function calculateDomainAuthority() {
var linkingRootDomainsInput = document.getElementById("linkingRootDomains");
var totalBacklinksInput = document.getElementById("totalBacklinks");
var domainAgeYearsInput = document.getElementById("domainAgeYears");
var siteTrafficMonthlyInput = document.getElementById("siteTrafficMonthly");
var brandMentionsInput = document.getElementById("brandMentions");
var linkingRootDomains = parseFloat(linkingRootDomainsInput.value);
var totalBacklinks = parseFloat(totalBacklinksInput.value);
var domainAgeYears = parseFloat(domainAgeYearsInput.value);
var siteTrafficMonthly = parseFloat(siteTrafficMonthlyInput.value);
var brandMentions = parseFloat(brandMentionsInput.value);
var resultContainer = document.getElementById("result-container");
var domainAuthorityScoreDiv = document.getElementById("domain-authority-score");
var resultMessageP = document.getElementById("result-message");
// Basic validation to prevent NaN
if (isNaN(linkingRootDomains) || isNaN(totalBacklinks) || isNaN(domainAgeYears) || isNaN(siteTrafficMonthly) || isNaN(brandMentions)) {
domainAuthorityScoreDiv.textContent = "N/A";
resultMessageP.textContent = "Please enter valid numbers for all fields.";
resultContainer.style.display = "block";
return;
}
// — Simplified DA Estimation Formula —
// This is a hypothetical formula designed to simulate DA trends.
// It's not the actual Moz algorithm, which is proprietary.
// Assign weights (these are arbitrary and for demonstration)
var weightRootDomains = 0.45;
var weightTotalBacklinks = 0.20;
var weightDomainAge = 0.15;
var weightTraffic = 0.10;
var weightBrandMentions = 0.10;
// Normalize inputs to avoid extremely high scores and create a more linear relationship
// Logarithmic scaling often used to better represent diminishing returns
var normalizedRootDomains = Math.log(linkingRootDomains + 1); // +1 to handle 0
var normalizedTotalBacklinks = Math.log(totalBacklinks + 1); // +1 to handle 0
var normalizedDomainAge = Math.log(domainAgeYears * 12 + 1); // Convert years to months for finer granularity
var normalizedTraffic = Math.log(siteTrafficMonthly + 1);
var normalizedBrandMentions = Math.log(brandMentions + 1);
// Calculate weighted score
var rawScore = (weightRootDomains * normalizedRootDomains) +
(weightTotalBacklinks * normalizedTotalBacklinks) +
(weightDomainAge * normalizedDomainAge) +
(weightTraffic * normalizedTraffic) +
(weightBrandMentions * normalizedBrandMentions);
// Scale the raw score to the 1-100 DA range.
// This is a crucial step and requires tuning.
// We'll use a sigmoid-like function or a simple linear scaling with caps.
// For simplicity, let's try a scaled linear approach that caps at 100.
// Estimate a maximum possible raw score based on high input values (e.g., 10000 root domains, 1M backlinks, 20 years, 1M traffic, 10k mentions)
// Log(10001) ~ 9.2
// Log(1M+1) ~ 13.8
// Log(20*12+1) = Log(241) ~ 5.4
// Log(1M+1) ~ 13.8
// Log(10001) ~ 9.2
// Max Raw Score ~ (0.45*9.2) + (0.20*13.8) + (0.15*5.4) + (0.10*13.8) + (0.10*9.2)
// Max Raw Score ~ 4.14 + 2.76 + 0.81 + 1.38 + 0.92 = 9.01 (This rough estimate suggests the current weights might be too small for typical DA range)
// Let's adjust the scaling factor. The actual algorithm is complex.
// A simpler approach might be to aim for average DA scores for typical inputs.
// Let's assume typical inputs yield a raw score of ~3-5, and we want to map this to ~30-60 DA.
// Let's use a multiplier and an offset, then cap it.
var estimatedDA = (rawScore * 10) + 20; // Multiplier and offset to bring scores into a more typical range
// Cap the score between 1 and 100
estimatedDA = Math.max(1, Math.min(100, estimatedDA));
// Round to the nearest whole number
var finalDA = Math.round(estimatedDA);
domainAuthorityScoreDiv.textContent = finalDA;
var message = "";
if (finalDA < 20) {
message = "Your site has low Domain Authority. Focus on building quality backlinks and improving content.";
} else if (finalDA < 40) {
message = "Your site has moderate Domain Authority. Keep up the good work with SEO efforts!";
} else if (finalDA < 60) {
message = "Your site has good Domain Authority. You are on the right track for strong search rankings.";
} else {
message = "Your site has very high Domain Authority! This indicates a strong online presence.";
}
resultMessageP.textContent = message;
resultContainer.style.display = "block";
}