Calculate Estimated Domain Authority
Use detailed SEO signals to estimate authority strength, compare websites, and identify the biggest ranking opportunities.
Example Data Table
Use this sample to understand typical input ranges for different website profiles.
| Website Type | Referring Domains | Quality Backlinks | Spam Score | Organic Keywords | Monthly Traffic | Topical Relevance |
|---|---|---|---|---|---|---|
| New Niche Blog | 28 | 40 | 12% | 160 | 900 | 63% |
| Growing SaaS Site | 240 | 920 | 7% | 3,400 | 24,000 | 81% |
| Established Publisher | 2,500 | 16,500 | 4% | 42,000 | 410,000 | 89% |
Formula Used
This calculator estimates authority. It does not reproduce any proprietary third party score. It combines normalized SEO signals into a weighted composite model.
Normalized Signal = log(1 + value) / log(1 + reference max)
Used for: referring domains, keywords, traffic, and brand mentions.
Percentage Signal = raw percentage / 100
Used for: link diversity, follow ratio, topical relevance, and page speed.
Quality Ratio = quality backlinks / total backlinks
Weighted Base = Σ(normalized signal × assigned weight)
Authority Score = clamp((Weighted Base × 100) - (Spam Score × 0.18), 1, 100)
Balanced mode emphasizes referring domains and backlink quality, while growth mode gives more room to traffic and keyword visibility.
How to Use This Calculator
- Enter the domain name you want to evaluate.
- Fill in backlink, traffic, trust, and relevance inputs.
- Select a weighting profile that fits your analysis goal.
- Press Check Authority to generate the score.
- Review the result card shown above the form.
- Study the chart and normalized metrics for deeper insight.
- Download the summary as CSV or PDF for reporting.
Frequently Asked Questions
1. Is this the official Domain Authority score?
No. This tool provides an estimated authority score using visible SEO inputs. It helps compare websites internally, but it does not replace proprietary third party scoring models.
2. Why do referring domains matter so much?
Unique linking websites usually show broader trust than repeated links from one source. Strong authority often grows faster when more relevant domains link naturally.
3. What is a good spam score?
Lower is better. A low spam score suggests cleaner link patterns and healthier trust signals. Rising spam can weaken authority estimates and expose risky backlink profiles.
4. Can traffic improve the result?
Yes. Traffic reflects content visibility and ranking strength. While links remain central, consistent organic visits support stronger authority estimates in growth focused analysis.
5. Why is topical relevance included?
Authority is stronger when links, content, and keyword themes align. Relevant signals usually support better ranking consistency than unrelated mentions or broad, weak coverage.
6. Which weighting profile should I choose?
Use Balanced for general benchmarking, Link Heavy for backlink audits, and Growth Focused when traffic and keyword momentum matter more in planning decisions.
7. Can I use this for competitor analysis?
Yes. Apply the same assumptions to your site and competitors. That keeps comparisons fair and helps identify where stronger link quality or visibility may be driving gaps.
8. Does page speed affect authority directly?
Not always directly, but faster pages improve user experience and trust. In this model, speed acts as a supporting signal that can strengthen the final estimate.